Reactivity of ternary chalcogenides

• Published in: Solid state ionics 1986-12, Vol.22 (1), p.53-63
• Main Authors: Squattrito, Philip J., Sunshine, Steven A., Ibers, James A.
• Format: Article
• Language: English
• Subjects: Chemistry; Elements and non-metal compounds (oxides, hydroxides, hydrides, sulfides, carbides, ...); Exact sciences and technology; Inorganic chemistry and origins of life; Preparations and properties
• ISSN: 0167-2738; 1872-7689
• DOI: 10.1016/0167-2738(86)90058-5

The intercalation chemistry of some layered ternary chalcogenides has been investigated. The reaction of n-butyllithium with Ta 2NiSe 5 and Ta 2PdSe 6 affords the compounds Li 2Ta 2NiSe 5 and LiTa 2PdSe 6. X-ray powder diffraction data are indicative of significant structural changes upon intercalation. The addition of Cu to the NbPdS system has produced the compound Nb 2Pd 0.74Cu 0.22S 5. This compound has been characterized by single-crystal X-ray diffraction methods ( monoclinic, C 3 2h C2/ m, a = 12.208(6), b = 3.286(2), c = 14.851(8) A ̊ , β = 101.27(2)° ). The compound is part o f an isomorphous series of nonstoichiometric metallic conductors with the Nb 2Pd 0.71Se 5 structure, but it differs from its congeners in having Cu atoms in between the layers. The structural chemistry and reactivity associated with the van der Waals' region in these ternary compounds is compared with that of the binary Nb and Ta chalcogenides.