PD Dr. Oliver Janka

PD Dr. Oliver Janka
Permanent staff scientist (Akademischer Rat)
phone: +49-(0)681-302 70665
ORCID-ID: 0000-0002-9480-3888


► Tasks

  • Support of the powder X-ray diffractometers in the Servicestelle Röntgenbeugung
  • Support of the IT infrastructure of AG Kickelbick
  • Teaching (see below)

► Teaching

  • Solid state and structural chemistry (Festkörperchemie und Strukturchemie, AC05), winter term, lecturers: Prof. Kickelbick and PD Dr. Janka
  • Structural chemistry and crystallography (Strukturchemie und Kristallographie, AC10), winter term, lecturers: Prof. Kickelbick and PD Dr. Janka
  • Lab class: Crystallography and structural chemistry (Praktikum Kristallographie und Strukturchemie, ACK), winter term, lecturers: Prof. Kickelbick and PD Dr. Janka

► Research interests

Synthesis and characterization of structure and properties of intermetallic aluminum compounds and Zintl-phases

  • Studies regarding the electron transfer in ternary intermetallics of the noble metals and the alkali or alkaline earth metals
    • via 27Al NMR spectroscopy
    • via X-ray photoelectron spectroscopy (XPS)
    • via quantum-chemical calculations (DFT)
  • Investigations of the physical properties of rare-earth metal containing aluminum intermetallics:
    • magnetism
    • magnetocaloric properties
    • specific heat
    • electrical conductivity
  • Mößbauer spectrocopic investigations (121Sb & 151Eu)
  • Solution and refinement of modulated crystal structures

DFG project: "Studies concerning the electronic structure and the electron transfer in electron poor intermetallics"


► Curriculum Vitae


Umhabiliation an der Universität des Saarlandes
venia legendi in Anorganischer Chemie

seit 02/2020Akademischer Rat an der Universität des Saarlandes
09/2018 - 01/2020Nachwuchsgruppenleiter an der Westfälische Wilhelms-Universität Münster
10/2015 - 09/2018Vertretungsprofessur für Anorganische Chemie an der Carl-von-Ossietzky Universität Oldenburg
03/2013 - 10/2017Habilitation an der Westfälische Wilhelms-Universität Münster
Mentor Prof. Dr. Rainer Pöttgen
venia legendi in Anorganischer Chemie
"Synthese, Struktur und Eigenschaften intermetallischer Aluminiumverbindungen"
02/2011 - 01/2013PostDoc an der University of California, Davis
Mentorin Prof. Dr. Susan M. Kauzlarich
"Enhancement of the thermoelectric properties of Mg2Si via Yb-silicide inclusions for automotive transportation"
"Single crystal structure analysis of intermetallic compounds in cooperation with Los Alamos National Lab (LANL)"
Doktorvater Prof. Dr. Thomas Schleid
"Synthese und Charakterisierung von multinären Selten-Erd-Metall(III)-Fluoriden und Untersuchungen zu deren optischem Verhalten"
Mentor Prof. Dr. Thomas Schleid
"Studien zur Synthese und Analyse von Selten-Erd-Metall(III)-Oxidfluoriden"
2001 - 2006Studium Chemie (Diplom) Universität Stuttgart

► Team

PhD students

since 08/2021

Stefan Engel, MSc.
Topic of dissertation: "Studies concerning the electronic structure and the electron transfer in electron poor intermetallics"
(german: Studien zur Bindungssituation und zum Elektronenübertrag in elektronenarmen intermetallischen Verbindungen)

(DFG project: https://gepris.dfg.de/gepris/projekt/441210509)


seit 05/2022

Elias Gießelmann, MSc.
Thema der Dissertation: "Strukturelle und spektroskopische Untersuchungen von (oxidierten) intermetallischen Aluminiumverbindungen der frühen Übergangsmetalle"

Gemeinsame Betreuung mit Prof. Guido Kickelbick



► Publications

Book chapter



O. Janka:
"Intermetallic materials" in Comprehensive Inorganic Chemistry III
Elsevier, 2022
[DOI: 10.1016/B978-0-12-823144-9.00092-3]



S. Engel, O. Janka:
"Bulk Metallic Glasses" in Applied Inorganic Chemistry
De Gruyter, 2022 Chapter 2.11
[Link to Volume 1]   [Link to Volume 2]   [Link to Volume 3]



S. Engel, O. Janka:
"Shape Memory Alloys" in Applied Inorganic Chemistry
De Gruyter, 2022 Chapter 2.10
[Link to Volume 1]   [Link to Volume 2]   [Link to Volume 3]



O. Janka, M. Bertau, R. Pöttgen:
"Slags as materials resource" in Applied Inorganic Chemistry
De Gruyter, 2022 Chapter 6.4
[Link to Volume 1]   [Link to Volume 2]   [Link to Volume 3]



M. Buchner, O. Janka:
"Be and Be alloys" in Applied Inorganic Chemistry
De Gruyter, 2022 Chapter 2.7
[Link to Volume 1]   [Link to Volume 2]   [Link to Volume 3]



O. Janka:
"Metallic light-weight alloys – Al, Ti, Mg" in Applied Inorganic Chemistry
De Gruyter, 2022 Chapter 2.3
[Link to Volume 1]   [Link to Volume 2]   [Link to Volume 3]



O. Janka, S. M. Kauzlarich:
"Zintl Compounds" in Encyclopedia of Inorganic and Bioinorganic Chemistry
Wiley, 2021.
[DOI: 10.1002/9781119951438.eibc0244.pub3]



O. Janka, R. Pöttgen:
"Intermetallic compounds" in Rare Earth Chemistry
De Gruyter, 2020 Chapter 2.4, 163-176.
[DOI: 10.1515/9783110654929]



R. Pöttgen, O. Janka:
"High-Temperature Methods" in Handbook of Solid State Chemistry
Wiley-VCH, 2017Volume 2: Synthesis, Chapter 1, 1-21.
[DOI: 10.1002/9783527691036.hsscvol2003]



O. Janka, R. Pöttgen:
"Reactive Fluxes" in Handbook of Solid State Chemistry
Wiley-VCH, 2017Volume 2: Synthesis, Chapter 10, 275-286.
[DOI: 10.1002/9783527691036.hsscvol2012]



O. Janka, S. M. Kauzlarich:
"Zintl Compounds" in Encyclopedia of Inorganic and Bioinorganic Chemistry
Wiley, 2013, 1–14.
[DOI: 10.1002/9781119951438.eibc0244.pub2]



Th. Schleid, H. Müller-Bunz, O. Janka:
"Geo-Inspired Phosphors Based on Rare- Earth Metal(III) Fluorides with Complex Oxoanions: I. Fluoride Oxocarbonates and Oxosilicates", in Minerals as Advanced Materials II
Springer, 2012, 353–366.
[DOI: 10.1007/978-3-642-20018-2_33]




N. Zaremba, V. Pavlyuk, F. Stegemann, V. Hlukhyy, S. Engel, S. Klenner, R. Pöttgen, O. Janka:
MAl4Ir2 (M = Ca, Sr, Eu) – Superstructures of the KAu4In2 type
Monatsh. Chem. 2022.


H. Hübner, B.-J. Niebuur, O. Janka, L. Gemmer, M. Koch, T. Kraus, G. Kickelbick, B. Stühn, M. Gallei:
Crystalline Carbosilane-Based Block Copolymers: Synthesis by Anionic Polymerization and Morphology Evaluation in the Bulk State
Macromol. Chem. Phys. 2022, 2200178.
[DOI: 10.1002/macp.202200178]


J. Keuter, M. Dimitrova, O. Janka, A. Hepp, R. J. F. Berger, F. Lips:
An Anionic Amido-Substituted Seven-Vertex Siliconoid Cluster
Chem. Eur. J. 2022, e202201473.
[DOI: 10.1002/chem.202201473]


S. Baur, K. Brix, A. Feuerstein, O. Janka, R. Kautenburger:
Retention of waste cocktail elements onto characterised calcium silicate hydrate (C–S–H) phases: A kinetic study under highly saline and hyperalkaline conditions
Appl. Geochem. 2022, 143, 105319.
[DOI: 10.1016/j.apgeochem.2022.105319]



J. P. Scheifers, J. Flores, O. Janka, R. Pöttgen,B. P.T. Fokwa:
Triangular Arrangement of Ferromagnetic Iron Chains in the High-TC Ferromagnet TiFe1−xOs2+xB2
Chem. Eur. J. 2022, 28, e202201058.
[DOI: 10.1002/chem.202201058]



S. Engel, J. Bönnighausen, F. Stegemann, R. S. Touzani, O. Janka:
SrAl5Pt3 and Sr2Al16Pt9 – two new strontium aluminum platinides
Z. Naturforsch B. 2022, accepted.
[DOI: 10.1515/znb-2022-0012]



M. Hämmer, F. Pielnhofer, O. Janka, H. Takahashi, P. Gross, R. Pöttgen, H. A. Höppe:
Polymorphism and Optical, Magnetic and Thermal Properties of the either Phyllo- or Inosilicate-analogous Borosulfate Cu[B2(SO4)4]
Dalton Trans. 2022, 51, 3104-3115.
[DOI: 10.1039/D1DT04090A]




A. K. Boehm, S. Husmann, M. Besch, O. Janka, V. Presser, M. Gallei:
Porous Mixed-Metal Oxide Li-Ion Battery Electrodes by Shear-Induced Co-assembly of Precursors and Tailored Polymer Particles
ACS Appl. Mater. Interfaces 2021, 13, 61166-61179.

[DOI: 10.1021/acsami.1c19027]




W. Cao, S. Yin, M. Bitsch, S. Liang, M. Plank, M. Opel, M. A. Scheel, M. Gallei, O. Janka, M. Schwartzkopf, S. V. Roth, P. Müller-Buschbaum:
In Situ Study of FePt Nanoparticles-Induced Morphology Development during Printing of Magnetic Hybrid Diblock Copolymer Films
Adv. Funct. Mater. 2021, 32, 2107667.

[DOI: 10.1002/adfm.202107667]




E. Gießelmann, Rachid S. Touzani, B. Morgenstern, O. Janka:
Synthesis, Crystal and Electronic Structure of CaNi2Al8
Z. Naturforsch. 2021, 76b, 659-668.

[DOI: 10.1515/znb-2021-0105]



F. Stegemann, T. Block, S. Klenner, Y. Zhang, B. P. T. Fokwa, C. Doerenkamp, H. Eckert, O. Janka:
Structural, Physical, Theoretical and Spectroscopic Investigations of Mixed-Valent Eu2Ni8Si3 and its Structural anti-Type Sr2Pt3Al8
Eur. J. Inorg. Chem. 2021, 3832-3845.

[DOI: 10.1002/ejic.202100564]



l. Wang, K. Frisella, P. Srimuk, O. Janka, G. Kickelbick, V. Presser:
Electrochemical lithium recovery with lithium iron phosphate: What causes performance degradation and how can we improve the stability?
Sustain. Energy Fuels 2021, 5, 3124-3133.

[DOI: 10.1039/D1SE00450F]



S. Pohl, O. Janka, E. Füglein, G. Kickelbick:
Thermoplastic Silsesquioxane Hybrid Polymers with a Local Ladder-Type Structure
Macromolecules 2021, 54, 3873–3885.

[DOI: 10.1021/acs.macromol.1c00310]



E. Selb, T. Buttlar, O. Janka, M. Tribus, S. G. Ebbinghaus, G. Heymann:
Multianvil high-pressure/high-temperature synthesis and characterization of magnetoelectric HP-Co3TeO6
J. Mater. Chem. C 2021, 9, 5486–5496.

[DOI: 10.1039/D0TC05210H]



D. D. Zimmermann, O. Janka, C. Buyer, R. Niewa, Th. Schleid:
Nd5OF5Se4 and Sm5OF5Se4: New layered oxide fluoride selenides of the lanthanoids
Solid State Sci. 2021, 116, 106601.

[DOI: 10.1016/j.solidstatesciences.2021.106601]



P. Shankhari, O. Janka, R. Pöttgen, B. P. T. Fokwa:
Rare-Earth-free Magnets: Enhancing Magnetic Anisotropy and Spin Exchange Toward High-TC Hf2MIr5B2(M = Mn, Fe)
J. Am. Chem. Soc. 2021, 143, 4205–4212.

[DOI: 10.1021/jacs.0c10778]



E. M. Heppke, S. Klenner, O. Janka, R. Pöttgen, T. Bredow, M. Lerch:
Cu2ZnSbS4 – A thioantimonate(V) with remarkably strong covalent Sb–S bonding
Inorg. Chem. 2021, 60, 2730–2739.

[DOI: 10.1021/acs.inorgchem.0c03601]



M. Radzieowski, T. Block, J. Koppe, M. R. Hansen, R. Pöttgen, O. Janka:
(Pseudo)binary Antimonides: Insights on Local Ordering and Effective Charge Configurations from 121Sb MAS NMR and Mössbauer Spectroscopies
J. Phys. Chem. C, 2021, 125, 1454–1466.

[DOI: 10.1021/acs.jpcc.0c09650]




P. Pues, F. Baur, S. Schwing, D. Rytz, R. Pöttgen, C. Paulsen, O. Janka, B. Rendenbach, D. Johrendt, T. Jüstel:
Temperature and time-dependent luminescence of single crystals of KTb3F10
J. Lumin, 2020, 227, 117523.

[DOI: 10.1016/j.jlumin.2020.117523]



L. Pasqualini, O. Janka, S. Olthof, H. Huppertz, K. Liedl, R. Pöttgen, M. Podewitz, J. Bruns:
Ni[B2(SO4)4] and Co[B2(SO4)4]: Unveiling systematic trends in phyllosilicate analogue borosulfates
Chem. Eur. J., 2020, 26, 17405-17415.

[DOI: 10.1002/chem.202002221]



C. Funk, O. Reckeweg, F. J. DiSalvo, A. Schulz, S. Klenner, R. Pöttgen, O. Janka, Th. Schleid:
A New Class of Mixed-Valent Europium Halide ortho-Oxoborates: Eu6X[BO3]4 (X = Cl, Br and I)
J. Alloys Compd., 2020, 844, 156038.

[DOI: 10.1016/j.jallcom.2020.156038]



M. Hämmer, O. Janka, J. Böddinghausen, S. Klenner, R. Pöttgen, H. A. Höppe:
On the Phosphors Na5M(WO4)4 (M = Y, La-Nd, Sm-Lu, Bi) - Crystal Structures, Thermal Decomposition, Optical and Magnetic Properties
Dalton Trans., 2020, 49, 8209-8225 .

[DOI: 10.1039/D0DT00782J]



F. Eustermann, M. Eilers-Rethwisch, M. K. Reimann, O. Janka:
Synthesis and magnetic properties of the extended RE4Pd9Al24 series (RE = Sc, Y, Ce–Nd, Sm, Gd–Lu)
Z. Naturforsch. B, 2020, 75, 633-641.

[DOI: 10.1515/znb-2020-0051]



F. Eustermann, M. Eilers-Rethwisch, M. K. Reimann, O. Janka:
Structural transition and antiferromagnetic ordering in the solid solution CePd1–xAuxAl (x = 0.1–0.9)
Z. Naturforsch. B, 2020, 75, 895-901.

[DOI: 10.1515/znb-2020-0025]



M. Radziewoski, S. Klenner, R.-D. Hoffmann, O. Janka:
Structure Solution of Incommensurately Modulated La6MnSb15
Z. Kristallogr., 2020, 235, 291-301.

[DOI: 10.1515/zkri-2020-0034]



F. Stegemann, Y. Zhang, B. P. T. Fokwa, O. Janka:
On the Formation of the Gd3Ru4Al12 versus the Y2Co3Ga9 Type Structure – M3Rh4Al12 (M = Ca, Eu) versus M2T3Al9 (M = Ca, Sr, Eu, Yb; T = Ir, Pt).
Dalton Trans., 2020, 49, 6398-6406.

[DOI: 10.1039/D0DT00521E]



M. Zoller, R. Bubnova, S. Filatov, Y. Biryukov, E. Haussühl, R. Pöttgen, O. Janka, S. Penner, C. Praty, H. Fitzek, J. Winkler, H. Huppertz:
Elucidating the physical properties of the molybdenum oxide Mo4O11 and its tantalum substituted variant Mo2Ta2O11
Z. Kristallogr., 2020, 235, 143-155.

[DOI: 10.1515/zkri-2019-0073]



M. Radzieowski, F. Stegemann, S. Klenner, O. Janka:
On the Divalent Character of the Eu Atoms in the Ternary Zintl Phases Eu5In2Pn6 and Eu3MAs3 (Pn = As-Bi; M = Al, Ga)
Mater. Chem. Front., 2020, 4, 1231-1248.
[DOI: 10.1039/C9QM00703B]



M. Radzieowski, F. Stegemann, O. Janka:
Magnetic Properties of the RE2Pt6X15 (RE = Y, La-Nd, Sm, Gd-Lu; X = Al, Ga) Series
Eur. J. Inorg. Chem., 2020, 1199-1210.
[DOI: 10.1002/ejic.201901332]



S. Engelbert, O. Janka, S. Klenner, R. Pöttgen:
Tin-rich Phases RE2Au3Sn6 with RE = La, Ce, Pr, Nd, Sm - Synthesis, Structure, Magnetic Properties, and 119Sn Mössbauer Spectra
Z. Anorg. Allg. Chem., 2020, 646, 1508-1516.
[DOI: 10.1002/zaac.201900329]


M. Radzieowski, F. Stegemann, J. Bönnighausen, O. Janka:
Physical and Magnetocaloric Properties of TbPdAl2 and the Ferromagnetic Solid Solution Tb1-xLuxPdAl2 (x = 0.1-0.9)
Inorg. Chem., 2020, 59, 1137-1144.
[DOI: 10.1021/acs.inorgchem.9b02753]



C. Paulsen, T. Block, C. Benndorf, O. Oeckler, J. Bönnighausen, O. Janka, R. Pöttgen:
Au4 squares and linear infinite cadmium chains as building units in the intermetallic phases REAu4Cd2 (RE = La-Nd, Sm) with YbAl4Mo2 type structure
Z. Naturforsch., 2020, 75b, 73-82.
[DOI: 10.1515/znb-2019-0153]



M. Witt, J. Bönnighausen, F. Eustermann, A. Savourat, J. Scheifers, B. P. T. Fokwa, C. Doerenkamp, H. Eckert, O. Janka:
Extending the Knowledge on the Quaternary Rare Earth Nickel Aluminum Germanides of the RENiAl4Ge2 Series (RE = Y, Sm, Gd-Tm, Lu) - Structural, Magnetic and NMR-Spectroscopic Investigations
Z. Naturforsch., 2020, 75b, 149-162.
[DOI: 10.1515/znb-2019-0176]


O. Janka, R. Pöttgen:
The Role of Beryllium in Alloys, Zintl Phases and Intermetallic Compounds
Z. Naturforsch., 2020, 75b, 421-439.
[DOI: 10.1515/znb-2019-0105]




S. Engelbert, F. Stegemann, J. Bönnighausen, S. Klenner, O. Janka, R. Pöttgen:
Intermetallics of the types REPd3X2 and REPt3X2 (RE = La-Nd, Sm, Gd, Tb; X = In, Sn) with substructures featuring tin and In atoms in distorted square-planar coordination
Z. Naturforsch., 2019, 74b, 865-878.
[DOI: 10.1515/znb-2019-0166]



E. M. Heppke, S. Klenner, O. Janka, R. Pöttgen, M. Lerch:
Mechanochemical synthesis of Cu2MgSn3S8 and Ag2MgSn3S8
Z. Allg. Anorg. Chem., 2019, 646, 5-9.
[DOI: 10.1002/zaac.201900190]



F. Eustermann, F. Stegemann, M. Radzieowski, O. Janka:
Intermetallic RE6T5Al7 Phases (RE = Sc, Y, Ce-Nd, Sm, Gd-Lu, T = Ru, Ir) - Diversity in their Magnetic, Magnetocaloric and Critical Properties
Inorg. Chem., 2019, 58, 16211-16226.
[DOI: 10.1021/acs.inorgchem.9b02732]



F. Stegemann, J. Stahl, M. Bartsch, H. Zacharias, D. Johrendt, O. Janka:
Temperature Induced Valence Phase Transition in Intermediate-Valent YbPd2Al3
Chem. Sci., 2019, 10, 11086-11094.
[DOI: 10.1039/C9SC04437J]



F. Stegemann, R. St. Touzani, O. Janka:
Unusually Strong Heteroatomic Bonding in the Complex Polyanion of Intermetallic Ba6Pt22Al53
Dalton Trans., 2019, 48, 14103-14114.
[DOI: 10.1039/C9DT02653C]



A. Egeberg, T. Block, O. Janka, O. Wenzel, D. Gerthsen, R. Pöttgen, C. Feldmann:
Lithiumpyridinyl-driven Synthesis of High-Purity Zero-valent Iron Nanoparticles and Their Use in Follow-up Reactions
Small, 2019, 15, 1902321.
[DOI: 10.1002/smll.201902321]



F. Stegemann, T. Block, S. Klenner, Y. Zhang, B. P. T. Fokwa, A. Timmer, H. Mönig, C. Doerenkamp, H. Eckert, O. Janka:
From 3D to 2D: Structural, Spectroscopical and Theoretical Investigations of the Dimensionality Reduction in the [PtAl2]δ- Polyanions of the Isotypic MPtAl2 Series (M = Ca-Ba, Eu)
Chem. Eur. J., 2019, 10735-10747.
[DOI: 10.1002/chem.201901867]



M. Radzieowski, F. Stegemann, C. Doerenkamp, S. Matar, H. Eckert, C. Dosche, G. Wittstock, O. Janka:
Correlations of Crystal and Electronic Structure via NMR and XPS Spectroscopy in the RETMAl2 (RE = Sc, Y, La-Nd, Sm, Gd-Tm, Lu; TM = Ni, Pd, Pt) Series
Inorg. Chem., 2019, 58, 7010-7025.
[DOI: 10.1021/acs.inorgchem.9b00648]



L. Funke, O. Janka, R. Pöttgen, L. Glebov, M. R. Hansen, H. Eckert:
Short and Medium Range Order in Photothermal Refractive Glass Revealed by Solid-State NMR Techniques
J. Phys. Chem. C, 2019, 123, 12411-12422.
[DOI: 10.1021/acs.jpcc.9b02143]



F. Stegemann, O. Janka:
New Members of the Tetragonal RE14T3Al3 (RE = Sc, Y, Dy-Tm, Lu; T = Cu, Rh, Pd) Series
Monatsh. Chem., 2019, 150, 1175-1185.
[DOI: 10.1007/s00706-019-02434-2]



F. Stegemann, T. Block, S. Klenner, O. Janka:
An Unusual Valence State - Trivalent Europium in Intermetallic Eu2Ir3Al9
Chem. Eur. J., 2019, 25, 3505-3509.
[DOI: 10.1002/chem.201806297]


F. Stegemann, O. Janka:
Crystal structure and magnetic properties of the ternary rare earth metal-rich transition metallides RE14T3Al3 (RE = Y, Gd-Tm, Lu; T = Co, Ni)
Z. Naturforsch., 2019, 74b, 125-136.
[DOI: 10.1515/znb-2018-0196]



S. D. Kloß, O. Janka, T. Block, R. Pöttgen, R. Glaum, W. Schnick:
Open-shell 3d Transition Metal Nitridophosphates MIIP8N14 (MII = Fe, Co, Ni) by High-pressure Metathesis
Angew. Chem., 2019, 131, 4733-4737.
[DOI: 10.1002/ange.201809146]



M. Radzieowski, T. Block, S. Klenner, Y. Zhang, B. P. T. Fokwa, O. Janka:
Synthesis, Crystal and Electronic Structure, Physical Properties and 121Sb and 151Eu Mössbauer Spectroscopy of the Eu14AlPn11 series (Pn = As, Sb)
Inorg. Chem. Front., 2019, 6, 137-147.
[DOI: 10.1039/C8QI01099D]




J. Exner, S. Eusterwiemann, O. Janka, C. Doerenkamp, A. Massolle, O. Niehaus, C. G. Daniliuc, R. Pöttgen, J. Neugebauer, A. Studer, H. Eckert:
Antiferromagnetic Ordering Based on Intermolecular London Dispersion Interactions in Amphiphilic TEMPO Ammonium Salts
Phys. Chem. Chem. Phys., 2018, 20, 28979-28983.
[DOI: 10.1039/C8CP05837G]


C. Stoll, O. Janka, R. Pöttgen, M. Seibald, D. Baumann, K. Wurst, H. Huppertz:
Short-Range Antiferromagnetic Ordering of Netlike S = 1/2 Linear Trimeric Units in the Copper Germanate K2Cu3Ge4O12
Inorg. Chem., 2018, 57, 14421-14426.
[DOI: 10.1021/acs.inorgchem.8b02594]


F. Stegemann, O. Janka:
Two series of rare earth metal-rich ternary aluminium transition metallides - RE6Co2Al (RE = Sc, Y, Nd, Sm, Gd-Tm, Lu) and RE6Ni2.25Al0.75 (RE = Y, Gd-Tm, Lu)
Z. Naturforsch., 2018, 73b, 927-942.
[DOI: 10.1515/znb-2018-0153]


F. Eustermann, F. Stegemann, S. Gausebeck, O. Janka:
Structural and magnetic investigations of the pseudo-ternary RE2TAl3 series (RE = Sc, Y, La-Nd, Sm, Gd-Lu; T = Ru, Rh, Ir) - size dependent formation of two different structure types
Z. Naturforsch., 2018, 73b, 819-830.
[DOI: 10.1515/znb-2018-0124]


S. Eusterwiemann, C. Doerenkamp, T. Dresselhaus, O. Janka, C.G. Daniliuc, R. Pöttgen, A. Studer, H. Eckert, J. Neugebauer:
Ferro- or Antiferromagnetism? Heisenberg Chains in the Crystal Structures of Verdazyl Radicals
Phys. Chem. Chem. Phys., 2018, 20, 22902-22908.
[DOI: 10.1039/C8CP03332C]


M. Glätzle, O. Janka, V. Svitlyk, D. Chernyshov, M. Bartsch, H. Zacharias, R. Pöttgen, H. Huppertz:
The high-pressure oxide Tb3O5 and its non-centrosymmetric low-temperature polymorph - a comprehensive study
Chem. Eur. J., 2018, 24, 15236-15245.
[DOI: 10.1002/chem.201804006]


P. Sander, A. Marković, M. Schmidtmann, O. Janka, G. Wittstock, R. Beckhaus:
Synthesis, Crystal Structures, and Magnetic and Electrochemical Properties of Highly Phenyl Substituted Trinuclear 5,6,11,12,17,18-Hexaazatrinaphthylene (HATNPh6)-Bridged Titanium Complexes
Inorg. Chem., 2018, 57, 11165-11174.
[DOI: 10.1021/acs.inorgchem.8b01728]


M. Radzieowski, F. Stegemann, T. Block, J. Stahl, D. Johrendt, O. Janka:
Abrupt Europium Valence Change in Eu2Pt6Al15 Around 45 K
J. Am. Chem. Soc., 2018, 140, 8950-8957.
[DOI: 10.1021/jacs.8b05188]


Z. Dong, O. Janka, J. Kösters, M. Schmidtmann, T. Müller:
A Dimeric η1,η5-Germole Dianion - Bridged Titanium(III) Complex with a Multicenter Ti-Ge-Ge-Ti Bond
Angew. Chem., 2018, 130, 8770-8774.
[DOI: 10.1002/ange.201804447]


F. Eustermann, S. Gausebeck, C. Dosche, M. Haensch, G. Wittstock, O. Janka:
Crystal Structure, Spectroscopic Investigations, and Physical Properties of the Ternary Intermetallic REPt2Al3 (RE = Y, Dy-Tm) and RE2Pt3Al4 Representatives (RE = Tm, Lu)
Crystals, 2018, 8, 169.
[DOI: 10.3390/cryst8040169]


O. Janka, R.-D. Hoffmann, B. Heying, R. Pöttgen:
Structural Phase Transitions in YPtGe2 and GdPtGe2
Dalton Trans., 2018, 47, 6075-6088.
[DOI: 10.1039/C8DT00815A]


J. Bruns, M. Podewitz, K. R. Liedl, O. Janka, R. Pöttgen, H. Huppertz:
Cu[B2(SO4)4] and Cu[B(SO4)2(HSO4)] - two silicate analogue borosulfates differing in their dimensionality: a comparative study of stability and acidity
Angew. Chem., 2018, 130, 9693-9697.
[DOI: 10.1002/ange.201803395]


S. Engelbert, O. Janka:
RE4TAl (RE = Y, Sm, Gd-Tm, Lu; T = Pd, Pt) - Synthesis and magnetism of new aluminum representatives with the Gd4RhIn type structure
Intermetallics, 2018, 96, 84-89.
[DOI: 10.1016/j.intermet.2018.02.016]


G. Galleani, S. H. Santagneli, Y. Ledemi, Y. Messaddeq, O. Janka, R. Pöttgen, H. Eckert:
Ultraviolet Upconversion Luminescence in a Highly Transparent Triply-Doped Gd3+-Tm3+-Yb3+ Fluoride-Phosphate Glasses
J. Phys. Chem. C, 2018, 122, 2275-2284.
[DOI: 10.1021/acs.jpcc.7b09562]


P. Bielec, O. Janka, T. Block, R. Pöttgen, W. Schnick:
Fe2Si5N8 - Access to Open-Shell Transition Metal Nitridosilicates
Angew. Chem. Int. Ed., 2018, 57, 2409-2412.
[DOI: 10.1002/anie.201713006]


Z. Haque, G. S. Thakur, G. K. Selvan, T. Block, O. Janka, R. Pöttgen, A. G. Joshi, R. Parthasarathy, S. Arumugam, L. C. Gupta, A. K. Ganguli:
Valence State of Eu and Superconductivity in Se-Substituted EuSr2Bi2S4F4 and Eu2SrBi2S4F4
Inorg. Chem., 2018, 57, 37-44.
[DOI: 10.1021/acs.inorgchem.7b01555]


K. Rosenstengel, A. Schulz, O. Niehaus, O. Janka, R. Pöttgen, A. Villinger:
Binary Polyazides Of Cerium And Gadolinium
Eur. J. Inorg. Chem., 2018, 778-790.
[DOI: 10.1002/ejic.201701408]




X. Tao, C. G. Daniliuc, O. Janka, R. Pöttgen, R. Knitsch, M. R. Hansen, H. Eckert, M. Lübbesmeyer, A. Studer, G. Kehr, G. Erker:
Reduction of Dioxygen by Radical/B(p-Cy6F4X)3 Pairs to Give Isolable Bis(borane)superoxide Compounds
Angew. Chem. Int. Ed., 2017, 56, 16868-16871.
[DOI: 10.1002/ange.201709309]



A. Werwein, F. Maass, L. Y. Dorsch, O. Janka, R. Pöttgen, T. C. Hansen, J. Kimpton, H. Kohlmann:
Hydrogenation Properties of Laves Phases LnMg2 (Ln = La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Ho, Er, Tm, Yb)
Inorg. Chem., 2017, 56, 15006-15014.
[DOI: 10.1021/acs.inorgchem.7b02319]



F. Eustermann, M. Eilers-Rethwisch, K. Renner, R.-D. Hoffmann, R. Pöttgen, O. Janka:
Magnetic properties of the germanides RE3Pt4Ge6 (RE = Y, Pr, Nd, Sm, Gd-Dy)
Z. Naturforsch., 2017, 72b, 855-864.
[DOI: 10.1515/znb-2017-0123]



J. Keuter, K. Schwedtmann, A. Hepp, K. Bergander, O. Janka, C. Doerenkamp, H. Eckert, C. Mück-Lichtenfeld, F. Lips:
Diradicaloid or Zwitterionic Character: The non-tetrahedral, unsaturated [Si4{N(SiMe3)Dipp}4] with butterfly-type Si4 substructure
Angew. Chem. Int. Ed., 2017, 56, 13866-13871.
[DOI: 10.1002/anie.201705787]



G. Heymann, E. Selb, M. Kogler, T. Götsch, E.-M. Köck, S. Penner, M. Tribus, O. Janka:
Li3Co1.06(1)TeO6: Synthesis, single-crystal structure and physical properties of a new tellurate compound with CoII/CoIII mixed valence and orthogonally oriented Li-ion channels
Dalton Trans., 2017, 46, 12663-12674.
[DOI: 10.1039/C7DT02663C]



J. Bruns, M. Podewitz, M. Schauperl, K. R. Liedl, O. Janka, R. Pöttgen, H. Huppertz:
Ag[B(SO4)2] - Synthesis, Crystal Structure, and Characterization of the First Precious-Metal Borosulfate
Eur. J. Inorg. Chem., 2017, 2017, 3981-3989.
[DOI: 10.1002/ejic.201700360]



M. K. Schmitt, O. Janka, R. Pöttgen, K. Wurst, H. Huppertz:
The High-Pressure Nickel Borate Hydrate Ni3B18O28(OH)4 · H2O
Eur. J. Inorg. Chem., 2017, 2017, 3508-3515.
[DOI 10.1002/ejic.201700464]



E. Selb, T. Götsch, O. Janka, S. Penner, G. Heymann:
Crystal Structures of the High-Pressure Palladium Dichalcogenides Pd0.94(1)S2 and Pd0.88(1)Se2 Comprising Exceptional PdIV Oxidation States
Z. Anorg. Allg. Chem., 2017, 643, 1415-1423.
[DOI 10.1002/zaac.201700140]



S. Tencé, B. Heying, O. Janka, R. Pöttgen, B. Chevalier:
Hydrogenation-induced cerium valence change in CeNiZn
J. Alloys Compds., 2017, 724, 515-519.
[DOI 10.1016/j.jallcom.2017.07.038]



S. Eusterwiemann, C. Doerenkamp, T. Dresselhaus, O. Janka, M. de Oliveira Jr., C. G. Daniliuc, H. Eckert, J. Neugebauer, R. Pöttgen, A. Studer:
Strong Intermolecular Antiferromagnetic Verdazyl-Verdazyl Coupling in the Solid State
Phys. Chem. Chem. Phys., 2017, 19, 15681-15685.
[DOI 10.1039/C7CP02950K]



M. K. Schmitt, O. Janka, R. Pöttgen, H. Huppertz:
Structure Elucidation and Characterization of the High-Pressure Nickel Borate Hydroxide NiB3O5(OH)
Z. Anorg. Allg. Chem., 2017, 643, 1344-1350.
[DOI 10.1002/zaac.201700130]



C. Benndorf, H. Eckert, O. Janka:
Structural Characterization of Intermetallic Compounds by 27Al Solid State NMR Spectroscopy
Acc. Chem. Res., 2017, 50, 1459-1467.
[DOI 10.1021/acs.accounts.7b00153]



F. Eustermann, F. Stegemann, K. Renner, O. Janka:
Platinum Triangles in the Pt/Al Framework of the Intermetallic REPt6Al3 (RE = Ce-Nd, Sm, Gd, Tb) Series
Z. Anorg. Allg. Chem., 2017, 643, 1836-1843.
[DOI 10.1002/zaac.201700090]



F. Stegemann, C. Benndorf, Y. Zhang, M. Bartsch, H. Zacharias, B. P. T. Fokwa, H. Eckert, O. Janka:
On Ternary Intermetallic Aurides: CaAu2Al2, SrAu2-xAl2+x and Ba3Au5+xAl6-x
Z. Anorg. Allg. Chem., 2017, 643, 1379-1390.
[DOI 10.1002/zaac.201700103]



S. Eusterwiemann, T. Dresselhaus, C. Doerenkamp, O. Janka, O. Niehaus, A. Massolle, C. G. Daniliuc, H. Eckert, R. Pöttgen, J. Neugebauer, A. Studer:
Cooperative Magnetism in Crystalline N-Aryl-substituted Verdazyl Radicals: First-Principles Predictions and Experimental Results
Chem. Eur. J., 2017, 23, 6069-6082.
[DOI 10.1002/chem.201700988]



M. K. Schmitt, O. Janka, R. Pöttgen, C. Benndorf, M. de Oliveira Jr., H. Eckert, F. Pielnhofer, A.-S. Tragl, R. Weihrich, B. Joachim, D. Johrendt, H. Huppertz:
Mo2B4O9 - Connecting borate and metal cluster chemistry
Angew. Chem., 2017, 56, 6449-6453.
[DOI 10.1002/anie.201701891]



M. K. Schmitt, O. Janka, O. Niehaus, T. Dresselhaus, J. Neugebauer, R. Pöttgen, F. Pielnhofer, R. Weihrich, M. Krzhizhanovskaya, S. Filatov, R. Bubnova, L. Bayarjargal, B. Winkler, R. Glaum and H. Huppertz:
Synthesis and Characterization of the New High Pressure Nickel Borate γ-NiB4O7
Inorg. Chem., 2017, 56, 4217-4228.
[DOI 10.1021/acs.inorgchem.7b00243]



M. Radzieowski, F. Stegemann, R.-D. Hoffmann, O. Janka:
The Monoclinic Superstructure of the M2Pt6Al15 Series (M = Ca, Sc, Y, La, Lu)
Z. Kristallogr., 2017, 232, 675-687.
[DOI 10.1515/zkri-2017-2050]



M. Radzieowski, T. Block, T. Fickenscher, Y. Zhang, B. P. T. Fokwa, O. Janka:
Synthesis, Crystal and Electronic Structures, Physical Properties and 121Sb and 151Eu Mössbauer Spectroscopy of the Alumo-Antimonide Zintl-Phase Eu5Al2Sb6
Mater. Chem. Front., 2017, 1, 1563-1572.
[DOI 10.1039/C7QM00057J]



C. Backes, A. Isaeva, O. Janka:
Trendberichte: Festkörperchemie 2016
Nachrichten aus der Chemie, 2017, 65, 255-265.
Zugang über die GDCh
[DOI 10.1002/nadc.20174059830]



B. Anke, S. Hund, C. Lorent, O. Janka, T. Block, R. Pöttgen, M. Lerch:
Synthesis, Crystal Structure, and Magnetic Properties of Pyrochlore-Type Eu2Ta2(O,N)7+δ
Z. Anorg. Allg. Chem., 2017, 643, 1824-1830.
[DOI 10.1002/zaac.201700024]



C. Benndorf, F. Stegemann, S. Seidel, L. Schubert, M. Bartsch, H. Zacharias, B. Mausolf, F. Haarmann, H. Eckert, R. Pöttgen, O. Janka:
Equiatomic AEAuX (AE = Ca-Ba, X = Al-In) Intermetallics - A Systematic Study of the Electronic Structure and Spectroscopic Properties
Chem. Eur. J., 2017, 23, 4187-4196.
[DOI 10.1002/chem.201605838]



S. Seidel, O. Janka, C. Benndorf, B. Mausolf, F. Haarmann, H. Eckert, L. Heletta, R. Pöttgen:
Ternary rhombohedral Laves phases RE2Rh3Ga (RE = Y, La-Nd, Sm, Gd-Er)
Z. Naturforsch. B, 2017, 72, 289-303.
[DOI 10.1515/znb-2016-0265]



T. Lüdtke, D. Wiedemann, I. Efthimiopoulos, N. Becker, S. Seidel, O. Janka, R. Pöttgen, R. Dronskowski, M. Koch-Müller, M. Lerch:
HP-MoO2 - A High-Pressure Polymorph of Molybdenum Dioxide
Inorg. Chem., 2017, 56, 2321-2327.
[DOI 10.1021/acs.inorgchem.6b03067]



S. Peschke, V. Weippert, A. Senyshyn, M. Mühlbauer, O. Janka, R. Pöttgen, S. Holenstein, H. Luetkens, D. Johrendt:
Flux synthesis, crystal structures, and magnetic ordering of the rare-earth chromium(II) oxyselenides RE2CrSe2O2 (RE = La-Nd)
Inorg. Chem., 2017, 56, 2241-2247.
[DOI 10.1021/acs.inorgchem.6b02895]



S. Seidel, U. Ch. Rodewald, O. Janka, R. Pöttgen:
Ternary gallides RE4Rh9Ga5, RE5Rh12Ga7 and RE7Rh18Ga11 (RE = Y, La-Nd, Sm, Gd, Tb) - Intergrowth structures with MgCu2 and CaCu5 related slabs
Z. Kristallogr., 2017, 232, 365-374.
[DOI 10.1515/zkri-2016-2017]



F. Eustermann, R.-D. Hoffmann, O. Janka:
Superstructure Formation in PrNi2Al3 and ErPd2Al3
Z. Kristallogr., 2017, 232, 573-581.
[DOI 10.1515/zkri-2016-2023]



F. Stegemann, C. Benndorf, Y. Zhang, M. Bartsch, H. Zacharias, B. P. T. Fokwa, H. Eckert, O. Janka:
Network Formation by Condensed Tetrahedral [Au3Al] Units in Na2Au3Al: Crystal and Electronic Structure, Spectroscopic Investigations and Physical Properties of an Ordered Ternary Auride
Inorg. Chem., 2017, 56, 1919-1931.
[DOI 10.1021/acs.inorgchem.6b02480]



T. M. Atkins, J. H. Walton, M. P. Singh, S. Ganguly, O. Janka, A. Y. Louie, S. M. Kauzlarich:
EPR and Structural Characterization of Water Soluble Mn2+ Doped Si Nanoparticles
J. Phys. Chem. C, 2017, 121, 1948-1956.
[DOI 10.1021/acs.jpcc.6b11000]



C. Benndorf, H. Eckert, O. Janka:
Ternary rare-earth aluminium intermetallics RE10TAl3 (RE = Y, Ho, Tm, Lu; T = Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, Pt) with an ordered anti-Co2Al5 structure
Dalton Trans., 2017, 48, 1083-1092.
[DOI 10.1039/C6DT04314C]



G. Heymann, B. Heying, U. Ch. Rodewald, O. Janka:
The high-pressure phase of CePtAl
Z. Naturforsch., 2017, 72b, 77-82.
[DOI 10.1515/znb-2016-0215]



O. Janka, J. V. Zaikina, S. K. Bux, H. Tabatabaifara, H. Yang, N. D. Browning, S. M. Kauzlarich:
Microstructure investigations of Yb- and Bi-doped Mg2Si prepared from metal hydrides for thermoelectric applicationsJ. Solid State Chem., 2017, 245, 152-159.
[DOI 10.1016/j.jssc.2016.10.011]




T. Dresselhaus, S. Eusterwiemann, D. R. Matuschek, C. G. Daniliuc, O. Janka, R. Pöttgen, A. Studer, J. Neugebauer:
Black-box determination of temperature dependent susceptibilities for crystalline organic radicals with complex magnetic topologies
Phys. Chem. Chem. Phys., 2016, 18, 28262-28273.
[DOI: 10.1039/C6CP05875B]



O. Janka, R.-D. Hoffmann, M. Eilers-Rethwisch, U. Ch. Rodewald, O. Niehaus, R. Pöttgen:
Revisiting Ce3Pt4Ge6 - Crystal Structure and Physical Properties
Inorg. Chem. Front., 2016, 3, 1289-1296.
[DOI: 10.1039/C6QI00248J]



J.-P. Schmiegel, T. Block, B. Gerke, T. Fickenscher, R. St. Touzani, B. P. T. Fokwa, O. Janka:
EuAu3Al2: Crystal and Electronic Structures, Spectroscopic, Magnetic and Magnetocaloric Properties
Inorg. Chem., 2016, 55, 9057-9064.
[DOI: 10.1021/acs.inorgchem.6b01530]



F. Stegemann, O. Janka:
RE16AuxAl13-x with RE = La - Nd, Sm (x ≤ 3): Synthesis, Crystal Structure and Physical Properties of an Intermetallic Solid Solution with Barrelane Analogue Units
Dalton Trans., 2016, 45, 13863-13871.
[DOI: 10.1039/C6DT02649D]



D. Pfister, K. Schäfer, C. Ott, B. Gerke, R. Pöttgen, O. Janka, M. Baumgartner, R. Weihrich, A. Efimova, A. Hohmann, P. Schmidt, S. Venkatachalam, L. van Wüllen, U. Schürmann, L. Kienle, V. Duppel, E. Parzinger, B. Miller, J. Becker, A. Holleitner, T. Nilges:
Inorganic double helices in semiconducting SnIP
Adv. Mater., 2016, 28, 9783-9791.
[DOI: 10.1002/adma.201603135]



F. Stegemann, C. Benndorf, R. St. Touzani, B. P. T. Fokwa, O. Janka:
Experimental and Theoretical Investigations of the Polar Intermetallics SrPt3Al2 and Sr2Pd2Al
J. Solid State Chem., 2016, 242, 143-150.
[DOI: 10.1016/j.jssc.2016.07.019]



O. Janka, O. Niehaus, R. Pöttgen, B. Chevalier:
Cerium Intermetallics with TiNiSi-Type Structure
Z. Naturforsch., 2016, 71b, 737-764.
[DOI: 10.1515/znb-2016-0101]



M. Radzieowski, C. Benndorf. S. Haverkamp, H. Eckert, O. Janka:
On New Ternary Equiatomic Scandium Transition Metal Aluminum Compounds ScTAl with T = Cr, Ru, Ag, Re, Pt, and Au
Z. Naturforsch., 2016, 71b, 553-566.
[DOI: 10.1515/znb-2016-0044]



R. Pöttgen, O. Janka, B. Chevalier:
Cerium Intermetallics CeTX - Review III
Z. Naturforsch., 2016, 71b, 165-191.
[DOI: 10.1515/znb-2016-0013]



F. Stegemann, C. Benndorf, R. St. Touzani, B. P. T. Fokwa, O. Janka:
Sr2Pd4Al5: Synthesis, Crystal and Electronic Structures, and Chemical Bonding of a New Polar Intermetallic Compound
Eur. J. Inorg. Chem., 2016, 2016, 1108-1114.
[DOI: 10.1002/ejic.201501455]



G. Heymann, B. Heying, U. Ch. Rodewald, O. Janka, H. Huppertz, R. Pöttgen:
High-pressure high-temperature crystal growth of equiatomic rare earth stannides RENiSn and REPdSn
J. Solid State Chem., 2016, 236, 138-146.
[DOI: 10.1016/j.jssc.2015.06.044]



R.-D. Hoffmann, F. Stegemann, O. Janka:
SrPt2Al2 - A (3+2)D-incommensurately modulated variant of the CaBe2Ge2 type structure
Z. Kristallogr., 2016, 231, 127-142.
[DOI: 10.1515/zkri-2015-1891]



F. Stegemann, C. Benndorf, T. Bartsch, R. St. Touzani, M. Bartsch, H. Zacharias, B. P. T. Fokwa, H. Eckert, O. Janka:
Ba3Pt4Al4 - Structure, Properties, Theoretical and NMR Spectroscopic Investigations of a Complex Platinide Featuring Heterocubane [Pt4Al4] Units
Inorg. Chem., 2015, 54, 10785-10793.
[DOI: 10.1021/acs.inorgchem.5b01842]


D. D. Zimmermann, H. Grossholz, S. Wolf, O. Janka, A. C. Müller, T. Schleid:
Two Hexagonal Series of Lanthanoid(III) Oxide Fluoride Selenides: M6O2F8Se3 (M = La - Nd) and M2OF2Se (M = Nd, Sm, Gd – Ho)
Z. Anorg. Allg. Chem., 2015, 641, 1926-1933.
[DOI: 10.1002/zaac.201500253]


O. Niehaus, O. Janka:
Gradual Cerium Valence Change in the Solid Solution CeRu1-xPdxAl (x = 0.1-0.9)
Z. Anorg. Allg. Chem., 2015, 641, 1792-1797.
[DOI: 10.1002/ZAAC.201500139]


C. Benndorf, O. Niehaus, H. Eckert, O. Janka:
27Al and 45Sc NMR Spectroscopy on ScT2Al and Sc(T0.5T'0.5)2Al (T = T' = Ni, Pd, Pt, Cu, Ag, Au) Heusler Phases and Superconductivity in Sc(Pd0.5Au0.5)2Al
Z. Anorg. Allg. Chem., 2015, 641, 168-175.
[DOI: 10.1002/ZAAC.201400509]


O. Janka, T. Shang, R. E. Baumbach, E. D. Bauer, J. D. Thompson, S. M. Kauzlarich:
Structure and Magnetic Properties of Ce3(Ni/Al/Ga)11 — A New Phase with the La3Al11 Structure Type
Crystals, 2015, 5, 1-8.
[DOI: 10.3390/cryst5010001]


C. Benndorf, F. Stegemann, H. Eckert, O. Janka:
New Transition Metal-rich Rare-Earth Palladium/Platinum Aluminides with RET5Al2 Composition: Structure, Magnetism and 27Al NMR Spectroscopy
Z. Naturforsch. B, 2015, 70b, 101-110.
[DOI: 10.1515/znb-2014-0223]



S. Seidel, O. Niehaus, S. F. Matar, O. Janka, B. Gerke, U. Ch. Rodewald, R. Pöttgen:
The Gallium Intermetallics REPdGa3 (RE = La, Ce, Pr, Nd, Sm, Eu) with SrPdGa3-type Structure
Z. Naturforsch. B, 2014, 69b, 1105-1118.
[DOI: 10.5560/ZNB.2014-4119]


B. Gerke, O. Janka, R. Pöttgen:
RE6Pd13Zn4 (RE = La–Nd, Sm, Gd, Tb) – New Palladium-rich Phases with Pd@RE6 Octahedra in bcc Packing
Z. Anorg. Allg. Chem., 2014, 640, 2747-2752.
[DOI: 10.1002/zaac.201400334]


O. Niehaus, U. Ch. Rodewald, P. M. Abdala, R. St. Touzani, B. P. T. Fokwa, O. Janka:
Synthesis and Theoretical Investigations of the Solid Solution CeRu1-xNixAl (x = 0.1 - 0.95) Showing Cerium Valence Fluctuations
Inorg. Chem., 2014, 53, 2471-2480.
[DOI: 10.1021/ic402414f]


M. Eilers-Rethwisch, O. Niehaus, O. Janka:
Magnetic Ordering in the Solid Solution CePt1–xPdxAl (x = 0.1–0.8)
Z. Anorg. Allg. Chem., 2014, 640, 153-158.
[DOI: 10.1002/zaac.201300485]


S. K. Bux, A. Zevalkink, O. Janka, D. Uhl, S. M. Kauzlarich, J. G. Snyder, J.-P. Fleurial:
Glass-like lattice thermal conductivity and high thermoelectric efficiency in Yb9Mn4.2Sb9
J. Mater. Chem. A, 2014, 2, 215-220.
[DOI: 10.1039/C3TA14021K]



H. Grossholz, D. D. Zimmermann, O. Janka, Th. Schleid:
Oxidfluoridsulfide der Lanthanoide vom Formeltyp M6O2F8S3 (M = La – Nd, Sm, Gd)
Z. Naturforsch., 2013, 68b, 751-760.
[DOI: 10.5560/ZNB.2013-3110]


O. Janka, R. E. Baumbach, J. D. Thompson, E. D. Bauer, S. M. Kauzlarich:
Crystal Structure, Magnetism and Transport Properties of Ce3Ni25.75Ru3.16Al4.1B10
J. Solid State Chem., 2013, 205, 154-159.
[DOI: 10.1016/j.jssc.2013.05.041]



O. Janka, R. E. Baumbach, F. Ronning, J. D. Thompson, E. D. Bauer, S. M. Kauzlarich:
Crystal structure, magnetic and transport properties of CeRu1-xNixAl (x = 0.5)
Z. Anorg. Allg. Chem., 2012, 638, 1996-2000.
[DOI: 10.1002/zaac.201200173]


E. D. Bauer, M. M. Altarawneh, P. H. Tobash, K. Gofryk, O. E. Ayala-Valenzuela, J. N. Mitchell, R. D. McDonald, C. H. Mielke, F. Ronning, J.-C. Griveau, E. Colineau, R. Eloirdi, R. Caciuffo, B. L. Scott, O. Janka, S. M. Kauzlarich, J. D. Thompson:
Localized 5f electrons in superconducting PuCoIn5: consequences for superconductivity in PuCoGa5
J. Phys.: Condens. Matter, 2011, 24, 052206.
[DOI: 10.1088/0953-8984/24/5/052206]



C. M. Schurz, F. Lissner, O. Janka, Th. Schleid:
Synthesis and Crystal Structure of the N3--Poor Nitride Selenides with the Formula Type M5NSe6 (M = La – Pr) Containing Isolated Bitetrahedra N2M612+
Z. Anorg. Allg. Chem., 2011, 637, 1045–1051.
[DOI: 10.1002/zaac.201100033]


H. Grossholz, O. Janka, Th. Schleid:
Oxidfluoridsulfide der Lanthanide vom Formeltyp M3OF5S (M = Nd, Sm, Gd – Ho)
Z. Naturforsch., 2011, 66b, 213–220.
[DOI: 10.1515/znb-2011-0301]



O. Janka, H. Müller-Bunz, Th. Schleid:
Two Ta2O5-Rich Alkali-Metal Lanthanide(III) Oxotantalates(V): K2LaTa5O15 and NaTm2Ta15O41
Z. Anorg. Allg. Chem., 2010, 636. 1865–1869.
[DOI: 10.1002/zaac.201000211]



O. Janka, Th. Schleid:
Two Fluoride-Containing Oxotantalates(V) of the Light Lanthanides: NdFTa2O6 and La3Cl3TaO5F
Solid State Sci., 2009, 11, 1992–1997.
[DOI: 10.1016/j.solidstatesciences.2009.07.0020]


O. Janka, Th. Schleid:
Facile Synthesis of Bastnaesite-Type LaF[CO3] and its Thermal Decomposition to LaOF for Bulk and Eu3+-Doped Samples
Eur. J. Inorg. Chem., 2009, 357–362.
[DOI: 10.1002/ejic.200800931]



O. Janka, Th. Schleid:
CuEuFTe und AgBaFTe: Zwei unterschiedliche Münzmetall(I)-Fluorid-Telluride mit unterschiedlichen M2+-Kationen
Z. Anorg. Allg. Chem., 2008, 634, 2048.
[DOI: 10.1002/zaac.200870080]


O. Janka, Th. Schleid:
TbFCl2: Das erste Fluoridchlorid der dreiwertigen Lanthanoide
Z. Anorg. Allg. Chem., 2008, 634, 31–33.
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