Preparation and Structure of the Strontium and Barium Tantalates Sr3TaO5.5 and Ba3TaO5.5
Preparation and Structure of the Strontium and Barium Tantalates Sr3TaO5.5 and Ba3TaO5.5
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钽酸锶、钽酸钡Sr3TaO5.5和Ba3TaO5.5的制备及结构
DOI：
10.1021/ja01546a011
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发表时间：
1958
影响因子：
15
通讯作者：
L. Brixner
中科院分区：
文献类型：
--
作者：
L. Brixner
各位S和Ba 3 Ta 〇 3。5是由Ta_（20）_5与等量相应的碳酸盐在1100 ℃下在氧气中反应制得的。化合物的晶体结构为面心立方结构（NHhhFeFe），空间群为Ob 5。四个分子构成晶胞，晶格常数为8.34 A。对于Sr 3 TaO 5。5和8.69 A。对于Ba 3-TaO。6.比重瓶密度为5.935 g. cc.- 1和6.798 g。cc.- 1与6.088g. cc.- 1和6.906 g。cc.- 1所示。Sr 3 TaO 3的介电常数。5为14.3，Ba 3 TaO 3为14.3。5是13.18。
SrsTaOs. s and Ba3Ta03. 5 have been prepared by the reaction of Ta205 with equivalent amounts of the corresponding car-bonates at 1100 in oxygen. The compounds crystallize in the face centered cubic structure of (NHhhFeFe with the space group, Ob5. Four molecules constitute the unit cell with a lattice constant of 8.34 A. for Sr3Ta05. 5 and 8.69 A. for Ba3-TaOs. 6. The pycnometric densities of 5.935 g. cc.-1 and 6.798 g. cc.-1 are in good agreement with the X-ray densities of 6.088 g. cc.-1 and 6.906 g. cc.-1, respectively. The dielectric constant of Sr3Ta03. 5 is 14.3, and that of Ba3Ta03. 5is 13.18.