New M2+M4+Nb2O8 phases
New M2+M4+Nb2O8 phases
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DOI：
10.1016/0925-8388(94)90827-3
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发表时间：
1994-11
影响因子：
6.2
通讯作者：
A. Baumgarte;R. Blachnik
中科院分区：
文献类型：
--
作者：
A. Baumgarte;R. Blachnik
通过在1073至1673 K的温度下对压制粉末进行退火，制备了成分为MO MO 2 Nb 2 O 5（M2+ Be、Mg、Ca、Mn、Co、Ni、Zn、Cd; M4+ Ti、Zr、Ge、Sn）的样品，并通过X射线方法进行了研究。在大多数情况下形成固溶体，除了在系统中与GeO 2和BeO和MnO（CuO）xSnO 2的组合。三种结构类型，即金红石，黑钨矿和针铁矿。给出了晶格参数和均匀性范围。离子大小和结构类型之间的相关性。
Samples of composition MOMO2Nb2O5(M2+ Be, Mg, Ca, Mn, Co, Ni, Zn, Cd; M4+ Ti, Zr, Ge, Sn) have been prepared by annealing pressed powders at temperatures between 1073 and 1673 K and were investigated by the X-ray method. In most cases solid solutions are formed, except in the systems with GeO2and BeO and in the combinations MnO(CuO)SnO2. Three structure types,i.e.rutile, wolframite and ixiolite, were observed. The lattice parameters and homogeneity ranges are given. A correlation between ionic size and structure type was established.