TY - JOUR
T1 - Noncentrosymmetric cubic thio- and selenogermanates
T2 - A0.5M 1.75GeQ4 (A = Ag , Cu, Na; M = Pb, Eu; Q = S, Se)
AU - Iyer, Ratnasabapathy G.
AU - Aitken, Jennifer A.
AU - Kanatzidis, Mercouri G.
N1 - Funding Information:
Financial support from the National Science Foundation (Grant DMR 0127644) is gratefully acknowledged. This work made use of the SEM facilities at the Center for Electron Optics at Michigan State University. We acknowledge the use of the W.M. Keck Microfabrication facility at Michigan State University.
PY - 2004/5
Y1 - 2004/5
N2 - Five new isostructural cubic thiogermanates with the formula A 0.5M1.75GeQ4 (A=Ag, Cu, Na; M=Pb, Eu; Q=S, Se) have been prepared by direct combination of stoichiometric amounts of the elements. The compounds crystallize in the noncentrosymmetric space group I-43d with Z=16 and a=14.0291(5) Å for Ag0.5Pb1.75GeS 4, a=14.5949(19) Å for Ag0.5Pb 1.75GeSe4, a=13.9491(14) Å for Ag 0.5Eu1.75GeS4, a = 13.8145(9) Å for Cu0.5Pb1.75GeS4 and a = 14.662(4) Å for Na0.5Pb1.75GeSe4. The adopted structure is similar to that of Ba3CdSn2S8, and features tetrahedral [GeQ4]4- building blocks. These compounds are semiconductors with energy gaps (Eg) ranging from 1.48 to 1.83 eV.
AB - Five new isostructural cubic thiogermanates with the formula A 0.5M1.75GeQ4 (A=Ag, Cu, Na; M=Pb, Eu; Q=S, Se) have been prepared by direct combination of stoichiometric amounts of the elements. The compounds crystallize in the noncentrosymmetric space group I-43d with Z=16 and a=14.0291(5) Å for Ag0.5Pb1.75GeS 4, a=14.5949(19) Å for Ag0.5Pb 1.75GeSe4, a=13.9491(14) Å for Ag 0.5Eu1.75GeS4, a = 13.8145(9) Å for Cu0.5Pb1.75GeS4 and a = 14.662(4) Å for Na0.5Pb1.75GeSe4. The adopted structure is similar to that of Ba3CdSn2S8, and features tetrahedral [GeQ4]4- building blocks. These compounds are semiconductors with energy gaps (Eg) ranging from 1.48 to 1.83 eV.
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U2 - 10.1016/j.solidstatesciences.2004.03.001
DO - 10.1016/j.solidstatesciences.2004.03.001
M3 - Article
AN - SCOPUS:1942425607
SN - 1293-2558
VL - 6
SP - 451
EP - 459
JO - Solid State Sciences
JF - Solid State Sciences
IS - 5
ER -