Synthesis and characterisation of transition-metal-substituted gallium phosphates with the laumontite structure

被引:33
作者
Bond, AD
Chippindale, AM
Cowley, AR
Readman, JE
机构
[1] UNIV OXFORD,CHEM CRYSTALLOG LAB,OXFORD OX1 3PD,ENGLAND
[2] HERIOT WATT UNIV,DEPT CHEM,EDINBURGH,MIDLOTHIAN,SCOTLAND
来源
ZEOLITES | 1997年 / 19卷 / 5-6期
关键词
cobalt gallium phosphate; iron gallium phosphate; manganese gallium phosphate; laumontite; microporous; synthesis; crystal structure; magnetic susceptibility; imidazole;
D O I
10.1016/S0144-2449(97)00099-7
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Three novel metal-substituted gallium phosphates, (C3N2H5)(8)[Me8Ga16P24O96] (Me = Co, Fe, Mn), have been synthesised under solvothermal conditions and their structures determined using single-crystal X-ray diffraction. They are isostructural, with monoclinic symmetry, space group C 2/c and unit-cell dimensions ca. 15 x 13 x 15 Angstrom, beta ca. 111 degrees. The materials all have frameworks with the laumontite topology (structure type code LAU), constructed from alternating PO4 and MO4 tetrahedra (M = Me and Ga) with imidazole cations occupying sites within the channels of the framework. Magnetic susceptibility measurements show that the materials exhibit Curie-Weiss behaviour over wide ranges of temperature and that the transition metals are present as divalent cations. (C) Elsevier Science Inc. 1997.
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页码:326 / 333
页数:8
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