High-Temperature Homogenization Behaviour of Some Sodic Microperthites

Ian Parsons
Department of Geology and Mineralogy, University of Aberdeen, Aberdeen AB9 1AS, Scotland

Summary: While undergoing ‘dry’ homogenization at 980 °C the ¯201 X-ray reflections of sodic low-albite-microcline microperthites show that phase compositions recapitulate (but in a reverse timesense) the unmixing history of ordered feldspars about a solvus with a critical composition near 26 mole per cent KA1Si3O8.

Mineralogical Magazine; March 1975 v. 40; no. 309; p. 59-64; DOI: 10.1180/minmag.1975.040.309.08
© 1975, The Mineralogical Society
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