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Synthesis and crystal structure of BaFe[PO 4 ](OH), a new orthophosphate with a mixed framework related to alumosilicates of the nepheline group

Synthesis and crystal structure of BaFe[PO 4 ](OH), a new orthophosphate with a mixed framework... Abstract A new orthophosphate BaFe[PO4](OH) is obtained by hydrothermal synthesis. The unit cell parameters are as follows: a = 9.711(6), b = 8.991(5), and c = 4.912(2) Å; space group P212121. The structure has no features in common with the structures of three Ba-Fe phosphates studied. At the same time, the mixed framework, which is composed of five-vertex polyhedra of Fe and P-tetrahedra, exhibits a similarity to the frameworks of a number of alumosilicates belonging to the group of nepheline (nepheline NaAlSiO4, kalsilite KAlSiO4, and RbAlSiO4), as well as the beryllonite NaBePO4 beryllophosphate and H3O · ZnPO4 zin-cophosphate. All the frameworks contain six-membered rings which consist of alternating tetrahedra of different kinds with compensating cations at the ring centers. The topology of the new framework is most closely related to that of nepheline. Structures of this type are of interest as potential ion exchangers and ion-conducting materials. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Crystallography Reports Springer Journals

Synthesis and crystal structure of BaFe[PO 4 ](OH), a new orthophosphate with a mixed framework related to alumosilicates of the nepheline group

Belokoneva, E. L.; Dimitrova, O. V.
Crystallography Reports , Volume 55 (2): 5 – Mar 1, 2010
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References (6)

Publisher
Springer Journals
Copyright
2010 Pleiades Publishing, Ltd.
ISSN
1063-7745
eISSN
1562-689X
DOI
10.1134/s1063774510020082
Publisher site
See Article on Publisher Site

Abstract

Abstract A new orthophosphate BaFe[PO4](OH) is obtained by hydrothermal synthesis. The unit cell parameters are as follows: a = 9.711(6), b = 8.991(5), and c = 4.912(2) Å; space group P212121. The structure has no features in common with the structures of three Ba-Fe phosphates studied. At the same time, the mixed framework, which is composed of five-vertex polyhedra of Fe and P-tetrahedra, exhibits a similarity to the frameworks of a number of alumosilicates belonging to the group of nepheline (nepheline NaAlSiO4, kalsilite KAlSiO4, and RbAlSiO4), as well as the beryllonite NaBePO4 beryllophosphate and H3O · ZnPO4 zin-cophosphate. All the frameworks contain six-membered rings which consist of alternating tetrahedra of different kinds with compensating cations at the ring centers. The topology of the new framework is most closely related to that of nepheline. Structures of this type are of interest as potential ion exchangers and ion-conducting materials.

Journal

Crystallography Reports – Springer Journals

Published: Mar 1, 2010

Keywords: Crystallography and Scattering Methods

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