2001-2005

2005

Crystal structure of β-GeBr4, low temperature modification
J. Köhler, H. Okudera, A. Simon
Z. Kristallogr. NCS 2005, 220, 524.

Crystal structure of α-GeBr4, room temperature modification
J. Köhler, H. Okudera, D. Reuter, A. Simon
Z. Kristallogr. NCS 2005, 220, 523.

Large negative magnetoresistance of the rare-earth transition-metal intermetallic Compound PrMnSi2
S.-H. Kim, D.-K. Seo, R. K. Kremer, J. Köhler, A. Villesuzanne, M.-H. Whangbo
Chem. Mater. 2005, 17, 6338-6341.

Halides: Solid-state Chemistry
J. Köhler
in: Encyclopedia of Inorganic Chemistry, 10 Volume Set, R. Bruce King, Ed.,
Vol. 3, 1741-1761, 2005
John Wiley & Sons, New York, London, Sidney

Synthesis and characterization of [PtIn6](GeO4)2O and its solid solution
[PtIn6](GaO4)2-x(GeO4)xOx/2 (0 ≤ x ≤ 2):

Gradual color change of the solid solution from black (x = 0) to yellow (x = 2)
as a consequence of quantum dot effect

J. Köhler, H. Friedrich, M.-H. Whangbo, A. Villesuzanne
J. Am. Chem. Soc. 2005, 127, 12990-12996.

Syntheses and structures of Li3ScF6 and high pressure LiScF4-, luminescence properties of LiScF4,
a new phase in the system LiF-ScF
3
A. K. Tyagi, J. Köhler, P. Balog, J. Weber
J. Solid State Chem. 2005, 178, 2620-2625.

Observation of unusual hysteretic magnetic properties of the rare earth intermetallic compound PrMnSi2:
Magnetic susceptibility, magnetization, heat capacity and electronic band structure studies
S.-H. Kim, D.-K. Seo, R. K. Kremer, J. Köhler, A. Villesuzanne, M.-H. Whangbo
Chem. Mater. 2005, 17, 3711-3716.

Lattice thermal expansion studies of V2GeO4F2: A topaz type oxide-fluoride
S. N. Achary, A. K. Tyagi, J. Köhler
Mater. Res. Bull. 2005, 40, 1143-1147.

A "Flat/Steep Band" Model for Superconductivity
S. Deng, A. Simon, J. Köhler
Int. J. Mod. Phys. B 2005, 1, 2 & 3, 29-36.

Bonding and oxidation state of a transition metal atom encapsulated in an
isolated octahedral cluster cation of main group elements:

Synthesis, crystal structure and electronic structure of Pt2In14Ga3O8F15 containing
highly positive 18-electron complex [PtIn6]10+ and low-valent In+ ions

J. Köhler, J.-H. Chang, M.-H. Whangbo
J. Am. Chem. Soc. 2005, 127, 2277-2284.

2004

Single crystal structural study of Sr7Y6F30(O): an example of anion-rich fluorite derived structure with a cubooctahedron cluster
S. N. Achary, A. K. Tyagi, J. Köhler
Mater. Chem. Phys. 2004, 88, 207-211.

High temperature X-ray diffraction studies on sodium yttrium fluoride
M. D. Mathews, B. R. Ambekar, A. K. Tyagi, J. Köhler
J. Alloys Comp. 2004, 377, 162-166.

Lithium-Kupfer-Austausch in Li-intercaliertem Cu3N – mit einer Anmerkung über Cu4N
[Li-Cu Exchange in Intercalated Cu3N – With a Remark on Cu4N]
F. Gulo, A. Simon, J. Köhler, R. K. Kremer
Angew. Chem. 2004, 116, 2066-2068. [Int. Ed. 43, 2032-2034]

A "Flat/Steep Band" Scenario in Momentum Space
S. Deng, A. Simon, J. Köhler
J. Superconductivity  2004, 17, 227-231.

Phase transformation of zeolites Cs, Na-Y and Cs, Na-X impregnated with cesium hydroxide
A. Simon, J. Köhler, P. Keller, J. Weitkamp, A. Buchholz, M. Hunger
Microporous & Mesoporous Mater. 2004, 68, 143-150.

2003

Crystal Structure of dialuminium difluorotetraoxogermanate, Al2GeO4F2
M. D. Mathews, A. K. Tyagi, J. Köhler
Z. Kristallogr. NCS 2003, 218, 276.

The origin of a flat band
S. Deng, A. Simon, J. Köhler
J. Solid State Chem. 2003, 176, 412-416.

Ionicity versus covalency in MgB2: the hidden role of Mg
S. Deng, A. Simon, J. Köhler, A. Bussmann-Holder
J. Superconductivity 2003, 16, 919-922.

Superconductivity in MgB2: A Case Study of the "Flat Band-Steep Band" Scenario
S. Deng, A. Simon, J. Köhler
J. Superconductivity 2003, 16, 477-481.

2002

Preparation, structure and properties of V2GeO4F2-chains of VO4F2 octahedra in the first V (III) metallate fluoride
S. N. Achary, A. K. Tyagi, J. Köhler
J. Solid State Chem. 2002, 165, 74-78.

A Chemist's Approach to Superconductivity
S. Deng, J. Köhler, A. Simon
J. Superconductivity 2002, 15, 635-638.

Structures and properties of NbOF3 and TaOF3 – with a remark to the O/F ordering in the SnF4 type structure
J. Köhler, A. Simon, L. van Wüllen, S. Cordier, T. Roisnel, M. Poulain, M. Somer
Z. anorg. allg. Chem. 2002, 628, 2683-2690.

Chemical Bonding Variations and Electron-Phonon Interactions
S. Deng, A. Simon, J. Köhler
J. Am. Chem. Soc. 2002, 124, 10712-10717.

Structures and Properties of the Perovskite-Type Compounds Na1-xSrxNbO3
(0.1 ≤ x ≤ 0.9) – From Insulating to Metallic Condctivity
S. Ya. Istomin, G. Svensson, J. Köhler
J. Solid State Chem. 2002, 167, 7-16.

Metastable NaYF4 fluorite at high pressures and high temperatures
A. Grzechnik, P. Bouvier, W. A. Crichton, L. Farina, J. Köhler
Solid State Sciences 2002, 4, 895-899.

Hexagonal Na1.5Y1.5F6 at high pressures
A. Grzechnik, P. Bouvier, M. Mezouar, M. Mathews, A. Tyagi, J. Köhler
J. Solid State Chem. 2002, 165, 159-164.

Pressure-volume relationship of Ta
M. Hanfland, K. Syassen, J. Köhler
Applied Physics 2002, 91, 4143-4148.

Crystal Structure of lead yttrium fluoride, Pb8Y6F34, a new fluorite-related anion-rich fluoride
J. Köhler, S. N. Achary, A. K. Tyagi
Z. Kristallogr. 2002, 217, 23.

Refinement of the crystal structure of triplatinum-heptaindium, Pt3In7
H. A. Friedrich, J. Köhler
Z. Kristallogr. 2002, 217, 24.

A neutron powder diffcration study of Na1-xSrxTaO3 (x = 0.2 and 0.3)
S. Istomin, G. Svensson, J. Köhler
Solid State Sciences 2002, 4, 191-195.

2001

Preparation and structural elucidation of the new anion-excess fluorite variant Ba4Er3F17
A. K. Tyagi, J. Köhler
Solid State Sciences 2001, 3, 689-695.

Another view of electron-phonon coupling revealing peak-like structures in q-space
S. Deng, A. Simon, J. Köhler
J. Phys. Chem. Solids 2001, 62, 1441-1446.

Supraleitung in MgB2 bei 39 K – eine sensationelle und zugleich kuriose Entdeckung;
[Superconductivity in MgB2 at 39 K – a sensational and curious discovery]
J. Köhler
Angew. Chem. 2001, 113, 2501-2503. [Int. Ed. 40, 2435-2437]

Stabilization of High Temperature Tysonite Type Compounds in the Sr-Yb-F System-Synthesis and Rietveld Refinement
S. N. Achary, A. K. Tyagi, J. Köhler
Mat. Res. Bull. 2001, 36, 1109-1115.

[PtIn6] [GaO4]2 – das erste Oxid mit [PtIn6]-Oktaedern
Darstellung, Charakterisierung und Rietveldverfeinerung – mit einer Bemerkung zur Mischkristallreihe [PtIn6] [GaO4]2-x [InO4]x (0 < x ≤ 1)
H. A. Friedrich, J. Köhler
Z. anorg. allg. Chem. 2001, 627, 144-150.

 
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