Noncentrosymmetric cubic thio- and selenogermanates: A0.5M 1.75GeQ4 (A = Ag , Cu, Na; M = Pb, Eu; Q = S, Se)

Ratnasabapathy G. Iyer; Jennifer A. Aitken; Mercouri G. Kanatzidis

doi:10.1016/j.solidstatesciences.2004.03.001

Noncentrosymmetric cubic thio- and selenogermanates: A_0.5M _1.75GeQ₄ (A = Ag , Cu, Na; M = Pb, Eu; Q = S, Se)

Ratnasabapathy G. Iyer, Jennifer A. Aitken, Mercouri G. Kanatzidis

Northwestern University

Research output: Contribution to journal › Article › peer-review

29 Citations (Scopus)

Abstract

Five new isostructural cubic thiogermanates with the formula A _0.5M_1.75GeQ₄ (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 Ag_0.5Pb_1.75GeS ₄, a=14.5949(19) Å for Ag_0.5Pb _1.75GeSe₄, a=13.9491(14) Å for Ag _0.5Eu_1.75GeS₄, a = 13.8145(9) Å for Cu_0.5Pb_1.75GeS₄ and a = 14.662(4) Å for Na_0.5Pb_1.75GeSe₄. The adopted structure is similar to that of Ba₃CdSn₂S₈, and features tetrahedral [GeQ₄]^4- building blocks. These compounds are semiconductors with energy gaps (E_g) ranging from 1.48 to 1.83 eV.

Original language	English
Pages (from-to)	451-459
Number of pages	9
Journal	Solid State Sciences
Volume	6
Issue number	5
DOIs	https://doi.org/10.1016/j.solidstatesciences.2004.03.001
Publication status	Published - May 1 2004

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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@article{dc13319c847241cc9cdd94b9cfc247ff,

title = "Noncentrosymmetric cubic thio- and selenogermanates: A0.5M 1.75GeQ4 (A = Ag , Cu, Na; M = Pb, Eu; Q = S, Se)",

abstract = "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) {\AA} for Ag0.5Pb1.75GeS 4, a=14.5949(19) {\AA} for Ag0.5Pb 1.75GeSe4, a=13.9491(14) {\AA} for Ag 0.5Eu1.75GeS4, a = 13.8145(9) {\AA} for Cu0.5Pb1.75GeS4 and a = 14.662(4) {\AA} 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.",

author = "Iyer, {Ratnasabapathy G.} and Aitken, {Jennifer A.} and Kanatzidis, {Mercouri G.}",

year = "2004",

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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.

PY - 2004/5/1

Y1 - 2004/5/1

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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