Ternary Rare-Earth Titanium Antimonides RE2Ti11 − xSb14 + x (RE = Sm, Gd, Tb, Yb)

Autor:	Arthur Mar, Haiying Bie
Rok vydání:	2008
Předmět:	Inorganic Chemistry Pearson symbol Ytterbium Samarium Crystallography Octahedron Antimony Chemistry chemistry.chemical_element Physical and Theoretical Chemistry Isostructural Ternary operation Titanium
Zdroj:	Inorganic Chemistry. 47:6763-6770
ISSN:	1520-510X 0020-1669
Popis:	The isostructural rare-earth titanium antimonides RE 2Ti 11 - x Sb 14 + x ( RE = Sm, Gd, Tb, Yb) have been synthesized by arc-melting reactions of the elements. Single-crystal X-ray diffraction revealed that they adopt a new structure type (Pearson symbol oP54, space group Pnma, Z = 2; a = 15.8865(6)-15.9529(9) A, b = 5.7164(2)-5.7135(3) A, c = 12.9244(5)-12.9442(7) A for RE = Sm-Yb). The structure consists of titanium-centered octahedra (CN6) and pentagonal bipyramids (CN7) connected to form a 3D framework whose cavities are filled with RE atoms. 1D linear skewers of titanium atoms, within face-sharing octahedral chains, and similar skewers of antimony atoms, associated with the titanium-centered pentagonal bipyramids, extend along the b direction. On proceeding from Sm 2Ti 11Sb 14 to Tb 2Ti 10.41(1)Sb 14.59(1) and Yb 2Ti 10.58(1)Sb 14.42(1), antimony atoms are disordered within some of the titanium sites. Resistivity measurements on the samarium and ytterbium members indicated metallic behavior.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c146c67d237e0bcffc00845e5ac1a1ef https://doi.org/10.1021/ic800317c Zobrazit plný text záznamu