Tin-Rich Garnet, Pyroxene, and Spinel from a Slag

B. C. M. Butler
Department of Geology and Mineralogy, Parks Road, Oxford OX1 3PR

Summary: Garnet containing up to 26% SnO2, and pyroxene and spinel containing 12% and 10% SnO2 respectively, occur in a tin-refining slag in association with cassiterite. These tin contents probably represent minimum values for the limit of ionic replacement of Sn4+ in the structure of these minerals. The absence of tin from coexisting melilite suggests that Sn4+ is only able to substitute for ions in octahedral co-ordination.

Mineralogical Magazine; December 1978 v. 42; no. 324; p. 487-492; DOI: 10.1180/minmag.1978.042.324.11
© 1978, The Mineralogical Society
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