Synthesis and structure determination of reduced tantalates, Li2LaTa2O7, Li2Ca2Ta3O10 and Na2Ca2Ta3O10, with a layered perovskite structure
Synthesis and structure determination of reduced tantalates, Li2LaTa2O7, Li2Ca2Ta3O10 and Na2Ca2Ta3O10, with a layered perovskite structure
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具有层状钙钛矿结构的还原钽酸盐、Li2LaTa2O7、Li2Ca2Ta3O10 和 Na2Ca2Ta3O10 的合成和结构测定
DOI：
10.1039/a807038e
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发表时间：
1999
影响因子：
--
通讯作者：
Y. Hinatsu
中科院分区：
文献类型：
--
作者：
K. Toda;Masaki Takahashi;T. Teranishi;Z. Ye;Mineo Sato;Y. Hinatsu
新还原钽酸盐，Li
2
拉塔
2
氧
7
, 李
2
钙
2
塔
3
氧
10
和钠
2
钙
2
塔
3
氧
10
通过碱金属阳离子与母体 Dion-Jacobson 系列化合物的化学或电化学插层反应合成了具有层状钙钛矿结构的钙钛矿材料。通过粉末 X 射线衍射图的 Rietveld 分析确定了这些化合物的晶体结构，发现它们与母体化合物的晶体结构类似。由于较高的层间电荷密度，锂离子的嵌入导致沿钙钛矿层堆叠方向的较大收缩。这些插层化合物是具有层状钙钛矿结构的还原钽酸盐的第一个例子。
New reduced tantalates, Li
2
LaTa
2
O
7
, Li
2
Ca
2
Ta
3
O
10
and Na
2
Ca
2
Ta
3
O
10
, with a layered perovskite structure have been synthesized by a chemical or an electrochemical intercalation reaction of the alkali metal cations with the parent Dion-Jacobson series compounds. The crystal structures of these compounds were determined by Rietveld analysis of powder X-ray diffraction patterns, and found to be analogous to those of the parent compounds. The intercalation of the lithium ion leads to a large contraction along the stacking direction of perovskite layers because of a higher interlayer charge density. These intercalation compounds are the first example of reduced tantalates with a layered perovskite structure.