Jpn. J. Appl. Phys. 10 (1971) pp. 987-994  |Next Article|  |Table of Contents|
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Some Compounds of Tungsten-Bronze Type A₆B₁₀O₃₀ (B=Nb, Ti or Nb, W)

Takuro Ikeda, Takashi Haraguchi, Yasuhiko Onodera and Tsutomu Saito

(Received March 9, 1971)

Effects of substituting Ti or W for Nb in A₆B₁₀O₃₀-type niobates are examined. The general formula of the sample studied here is described as A_n^p+A_6-n^q+B_m^r+Nb_10-m⁵⁺O₃₀, where B^r+=Ti⁴⁺ or W⁶⁺ and A¹⁺=K, Na, A²⁺=Ba, Sr, A³⁺=Bi, La. There are found several tungsten-bronze type compounds. In order to elucidate the effect of Ti or W substitutions, they are classified on the basis of ionic radii and the value of n (or m), and the tungsten-bronze field is roughly determined. Variations with composition of lattice parameters and dielectric peak temperatures are considered based on the present classification.

URL: http://jjap.jsap.jp/link?JJAP/10/987/
DOI: 10.1143/JJAP.10.987

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