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Grown from lithium flux, the ErCo5Si3.17 silicide is a combination of disordered derivatives of the UCo5Si3 and Yb6Co30P19 structure types.
- Source :
-
Acta Crystallographica Section C: Structural Chemistry . Jun2015, Vol. 71 Issue 6, p506-510. 5p. - Publication Year :
- 2015
-
Abstract
- A ternary hexaerbium triacontacobalt enneakaidecasilicide, ErCo5Si3.17, crystallizes as a combination of disordered variants of the hexagonal UCo5Si3 ( P63/ m) and Yb6Co30P19 ( P) structure types and is closely related to the Sc6Co30Si19 and Ce6Rh30Si19 types. The Er, Co and three of the Si atoms occupy sites of m.. symmetry and a fourth Si atom occupies a site of .. symmetry. The environment of the Er atom is a 21-vertex pseudo-Frank-Kasper polyhedron. Trigonal prismatic coordination is observed for the Si atoms. The Co atoms are enclosed in heavily deformed cuboctahedra and 11-vertex polyhedra. Crystallochemistry analysis and the data from electronic structure calculations (TB-LMTO-ASA) suggest that the Er atoms form positively charged cations which compensate the negative charge of the [Co12Si9] m− polyanions. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20532296
- Volume :
- 71
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- Acta Crystallographica Section C: Structural Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 103417008
- Full Text :
- https://doi.org/10.1107/S2053229615009791