Structure and Growth Mechanism of Lanthanum Chromate
来源期刊：JOURNAL OF RARE EARTHS2005年第1期
论文作者：Fu Guifu Ao Qing Liu Weiming SUN Liangcheng Li Shengli Ling Ziyu
Key words：inorganic materials; lanthanum chromate; crystal growth; structural ledge; rare earths;
Abstract: The unit cell of lanthanum chromate was constructed by calculating equivalent points. By means of calculation of the hole octahedrally surrounded by O2- ions, it was considered that the sintered property of lanthanum chromate and the stability of Cr-O octahedron might be promoted by mixing a little Ca2+ ions. The growth mechanism was discussed in terms of structural ledge observed by SEM, the surfaces of the structural ledges parallel to (001), (010) and (110) planes, respectively. The misfit between (110) and (001) planes is only 0.0021 on common atomic plane, and the interconnection of the structured ledge may occur during crystal growth.
Fu Guifu1，Ao Qing1，Liu Weiming1，SUN Liangcheng1，Li Shengli1，Ling Ziyu1
(1.Department of Materials Science and Engineering, Shandong University, Jinan 250061, China;
2.Baotou Rare Earths Institute, Baotou 014010, China)
Abstract:The unit cell of lanthanum chromate was constructed by calculating equivalent points. By means of calculation of the hole octahedrally surrounded by O2- ions, it was considered that the sintered property of lanthanum chromate and the stability of Cr-O octahedron might be promoted by mixing a little Ca2+ ions. The growth mechanism was discussed in terms of structural ledge observed by SEM, the surfaces of the structural ledges parallel to (001), (010) and (110) planes, respectively. The misfit between (110) and (001) planes is only 0.0021 on common atomic plane, and the interconnection of the structured ledge may occur during crystal growth.
Key words:inorganic materials; lanthanum chromate; crystal growth; structural ledge; rare earths;
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