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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 26, Number 2
BKCSDE 26(2)
February 20, 2005 

Synthesis and Crystal Structure of a New Pentanary Thiophosphate, K0.5Ag0.5Nb2PS10.
Yongkwan Dong, Sangrok Kim, Hoseop Yun*, Hanjo Lim
Thiophosphate, Crystal structure
Single crystals of the new pentanary thiophosphate, K0.5Ag0.5Nb2PS10 has been prepared through reactions of the elements with halide fluxes. The structure of K0.5Ag0.5Nb2PS10 has been analyzed by single crystal X-ray diffraction technique. The structure of K0.5Ag0.5Nb2PS10 is made up of one-dimensional ∞ 1[Nb2PS10] chains along the [001] direction and these chains are separated from one another by Ag+ and disordered K+ ions. This chain is basically built up from bicapped trigonal prismatic [Nb2S12] units and tetrahedral [PS4] groups. The [Nb2S12] units are connected together to form the linear chain, ∞ 1[Nb2S9] by sharing the S-S prism edge. Short (2.885(2) A or 2.888(2) A) and long (3.743(1) A) Nb-Nb distances are alternating along the chain, and the S2 2? and S2? anionic species are observed. The distorted octahedral coordination around the Ag+ ion can be described as [2+4] bonding interaction.
309 - 311
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