Homologues of Mo4O11(mon) in the Mo-W-O system prepared by soft chemistry
Homologues of Mo4O11(mon) in the Mo-W-O system prepared by soft chemistry
复制标题
软化学制备Mo-W-O体系中Mo4O11(mon)的同系物
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
M. Figlarz
中科院分区：
文献类型：
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作者：
F. Portemer;M. Sundberg;L. Kihlborg;M. Figlarz
摘要用电子衍射和高分辨电子显微镜技术，观察到混合氧化物Mo_（0.72）W_（0.28）O_3（ReO_3型结构）经温和还原制备的样品中，存在与单斜相Mo_4O_（11）同型的相。该结构是由不同宽度（m）的ReO3型板中的角共享MO6八面体组成，由MO4四面体连接，从而形成交替的四边形和六边形隧道。相被认为是具有通式Mm+2O3m+4的结构的同源系列的成员m = 7和m = 8，其中Mo4O11是成员m = 6。给出了单胞维数的一般表达式。观察到一些缺陷，并提出了模型。
Abstract In specimens prepared by gentle reduction of the mixed oxide Mo0.72W0.28O3 (ReO3-type structure) phases isotypic of the monoclinic form of Mo4O11 have been observed and characterized by electron diffraction and high resolution electron microscopy techniques. The structures are built up of corner-sharing M O6 octahedra in ReO3-type slabs of different widths (m), connected by MO4 tetrahedra so that alternating four- and six-sided tunnels are formed. The phases are considered as members m = 7 and m = 8 of a homologous series of structures with the general formula Mm+2O3m+4, where Mo4O11 is the member m = 6. General expressions for the unit cell dimensions are given. Some defects are observed and models are proposed.