Ben Amor R, Zid MF, Driss A. K(0.8)Ag(0.2)Nb(4)O(9)AsO(4).
Acta Crystallogr Sect E Struct Rep Online 2008;
64:i41. [PMID:
21202442 PMCID:
PMC2961503 DOI:
10.1107/s1600536808015225]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2008] [Accepted: 05/20/2008] [Indexed: 11/22/2022]
Abstract
The title compound, potassium silver tetraniobium nonaoxide arsenate, K0.8Ag0.2Nb4O9AsO4, was prepared by a solid-state reaction at 1183 K. The structure consists of infinite (Nb2AsO14)n chains parallel to the b axis and cross-linked by corner sharing via pairs of edge-sharing octahedra. Each pair links together four infinite chains to form a three-dimensional framework. The K+ and Ag+ ions partially occupy several independent close positions in the interconnected cavities delimited by the framework. K0.8Ag0.2Nb4O9AsO4 is likely to exhibit fast alkali-ion mobility and ion-exchange properties. The Wyckoff symbols of special positions are as follows: one Nb 8e, one Nb 8g, As 4c, two K 8f, one Ag 8f, one Ag 4c, one O 8g, one O 4c.
Collapse