Metavariscite-A redetermination of its crystal structure

Kniep, R.; Mootz, D.

doi:10.1107/S0567740873006503

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Metavariscite-A redetermination of its crystal structure

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Kniep, R., & Mootz, D. (1973). Metavariscite-A redetermination of its crystal structure. Acta Crystallographica Section B, B29, 2292-2294. doi:10.1107/S0567740873006503.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0019-B4A1-8

Abstract

Metavariscite, AlPO 4.2H 2O, monoclinic, P2 1/ n, a=5.178 (2), b=9.514 (2), c=8.454 (2) Aring, beta=90.35 (2)deg, Z=4, Dm=2.54, Dx=2.535 g cm -3. PO 4 tetrahedra share vertices with four AlO 4(OH 2) 2 octahedra and vice versa. With Al...O distances of 1.892 (2) and 1.953 (2) Aring the two waters coordinate the aluminum in cis-position and donate two single and quite short and two bifurcated longer hydrogen bonds, respectively, to phosphate oxygens. None of the hydrogen bonds is along an octahedron edge.