Derivative Structures Based on the Alunite Octahedral Sheet: Mitridatite and Englishite

Paul Brian Moore
Department of the Geophysical Sciences, The University of Chicago, Chicago, Illinois 60637, USA

Summary: It is proposed that mitridatite and englishite contain octahedral sheets of the alunite type and that their formulae are [Ca6(H2O)3(PO4)2][Fe3(OH)6(PO4)(PO3OH)]3 and [K2Na(H2O)4Ca4·5 (PO3OH)3][Al3(OH)6(PO4)(PO3OH)]3 respectively.

Mineralogical Magazine; December 1976 v. 40; no. 316; p. 863-866; DOI: 10.1180/minmag.1976.040.316.07
© 1976, The Mineralogical Society
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