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APSe6 (A = K, Rb, and Cs): Polymeric selenophosphates with reversible phase-change properties.

作者信息

Chung In, Do Junghwan, Canlas Christian G, Weliky David P, Kanatzidis Mercouri G

机构信息

Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA.

出版信息

Inorg Chem. 2004 May 3;43(9):2762-4. doi: 10.1021/ic035448q.

DOI:10.1021/ic035448q
PMID:15106958
Abstract

The ternary alkali selenophosphates KPSe6 and RbPSe6 crystallize in the polar orthorhombic space group Pca2(1) with a = 11.7764(17) A, b = 6.8580(10) A, c = 11.4596(16) A, and Z = 4 for RbPSe6. CsPSe6 crystallizes in the monoclinic space group P2/n with a = 6.877(3) A, b = 12.713(4) A, c = 11.242(4) A, beta = 92.735(7) degrees, and Z = 4. All compounds feature the one-dimensional infinite chain of [PSe2(Se)4-], where each P atom is connected with Se4(2-) bridge. These compounds show reversible glass-crystal transition, and 31P NMR data suggest that crystallization and infinite [PSe(6-)] chain formation are coupled processes.

摘要

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