Are Vashegyite and Kingite Hydrous Aluminum Phyllophosphates with Kaolinite-Type Structures?

Duncan McConnell
The Ohio State University, Columbus, Ohio 43210, U.S.A.

Summary: In contrast with some other hydrous aluminum phosphates, vashegyite is crystalline. Simultaneous application of several assumptions leads to the hypothesis that it has a structure analogous to that of kaolinite, and thus contains tetrahedral sheets, n[X2O5], where X is both P and H3 (in lieu of Si). Thus, the theory involving [HXO4] is extended from phosphates with isolated tetrahedral groups [XO4] and framework linkages [XO2] to sheet linkages [X2O5]. Kingite also may have a kaolinite-like structure.

Mineralogical Magazine; September 1974 v. 39; no. 307; p. 802-806; DOI: 10.1180/minmag.1974.039.307.08
© 1974, The Mineralogical Society
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