CHARACTERIZATION OF LANTHANUM HEPTAMOLYBDATE CRYSTALS GROWN FROM SILICA-GELS

被引：7
|
作者：
BHAT, S [1 ]
KOTRU, PN [1 ]
机构：
[1] UNIV JAMMU,DEPT PHYS,JAMMU 180001,INDIA
来源：
MATERIALS CHEMISTRY AND PHYSICS | 1994年 / 39卷 / 02期
关键词：
LANTHANUM HEPTAMOLYBDATE CRYSTALS; SILICA GELS;
D O I：
10.1016/0254-0584(94)90187-2
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Crystals of lanthanum heptamolybdate grown from silica gel using the system La(NO3)3-MoO3-NH4OH-HNO3-Na2SiO3 were characterized. The results of energy-dispersive X-ray analysis, X-ray and electron diffraction, infrared spectroscopy, and optical and scanning electron microscopy are reported. The composition of the crystals is established as La2Mo7O(24)30H2O. The crystals exhibit varied morphologies, including square and octagonal platelets, cuboids, multifaceted crystals, coalesced and aggregated forms and spherulites. The spherulites are reported to have formed as a result of a large number of tiny crystallites becoming adhered in a spherical envelope.
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页码：118 / 123
页数：6
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