Some Natural Analcime Solid Solutions

J. F. G. Wilkinson
Department of Geology, The University of New England, Armidale, N.S.W.

Summary: Chemical, optical, and X-ray data are presented on three analcimes from a differentiation sequence, olivine-theralite to analcime-tinguaite; compared with the ideal analcime composition, they reveal replacement of NaAl→Si. Optical and X-ray data on these minerals accord reasonably well with analcimes possessing similar compositions, and synthesized in the sub-solidus region in the NaAlSiO4-NaAlSi3O8-H2O system.

Mineralogical Magazine; June 1963 v. 33; no. 261; p. 498-505; DOI: 10.1180/minmag.1963.033.261.06
© 1963, The Mineralogical Society
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