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Layered compounds BaM2Ge4Ch6 (M = Rh, Ir and Ch = S, Se) with pyrite-type building blocks and Ge-Ch heteromolecule-like anions
- Source :
- Inorganic chemistry. 53(11)
- Publication Year :
- 2014
-
Abstract
- Structure and chemical features of layered compounds BaM2Ge4Ch6 (M = Rh, Ir; Ch = S, Se) synthesized under high-pressure and high-temperature method are systematically studied. These compounds crystallize in an orthorhombic phase with space group Pbca (No. 61). The remarkable structural feature is to have the M-Ge-Ch pyrite-type building units, stacking with Ba-Ch layers alternatively along c axis. It is very rare and novel that pyrite-type subunits as the building blocks in the layered compounds. Theoretical calculations and experimental results indicate that there are strongly polarized covalent bonds between Ge and Ch atoms, forming heteromolecule-like anions in these compounds. Moreover, Ge atoms in this structure exhibit unusual valence state (~ +1) due to the tetrahedral coordination environment of Ge atoms along with M and Ch atoms simultaneously.<br />24 pages, 12 figures, 5 tables
- Subjects :
- Condensed Matter - Materials Science
Valence (chemistry)
Chemistry
Stacking
Materials Science (cond-mat.mtrl-sci)
FOS: Physical sciences
engineering.material
Inorganic Chemistry
Crystallography
Covalent bond
Tetrahedron
engineering
Orthorhombic crystal system
Pyrite
Physical and Theoretical Chemistry
Subjects
Details
- ISSN :
- 1520510X
- Volume :
- 53
- Issue :
- 11
- Database :
- OpenAIRE
- Journal :
- Inorganic chemistry
- Accession number :
- edsair.doi.dedup.....1aedef56f301867a1d75b4dd482fb0d6