Pyrochlore-type tin niobate.

Pyrochlore-type tin niobate.
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烧绿石型铌酸锡。

DOI:
10.1107/s0108270101010320
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发表时间:
2001
期刊:
Acta crystallographica. Section C, Crystal structure communications
影响因子:
--
通讯作者:
J. Rocha
J. Rocha
中科院分区:
--
文献类型:
--
作者:
L. P. Cruz;J. Savariault;J. Rocha

文献摘要

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以铌酸钠和氯化锡的混合物为原料,在1273 K下生长出Sn(1.59)Nb(1.84)O(6.35)单晶。结构为A(2)B(2)O(7)型焦绿石。锡被部分氧化为锡(IV),并与铌竞争b位。Sn(2+)孤对的立体活性诱导锡向隧道的O原子位移。
A single crystal of Sn(1.59)Nb(1.84)O(6.35) was grown at 1273 K from a mixture of sodium niobate and tin(II) chloride. The structure is of pyrochlore type A(2)B(2)O(7). The tin is partially oxidized to tin(IV) and competes with niobium for the occupation of site B. The stereoactivity of the Sn(2+) lone pair induces displacement of tin towards the O atoms of the tunnel.