Homogeneity in Alkali Feldspars

Ian Parsons
Department of Geology and Mineralogy, Marischal College, Aberdeen

Summary: Curves relating 201¯ spacing, Or content, and structural state of alkali feldspars are reviewed. Discrepancies between the compositions of heated natural perthitic alkali feldspars determined by this method and by chemical analysis are discussed and shown to be largely consistent with incomplete homogenization.

Mineralogical Magazine; June 1968 v. 36; no. 282; p. 797-804; DOI: 10.1180/minmag.1968.036.282.06
© 1968, The Mineralogical Society
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