The Calciferous and Alkali Amphiboles

R. Phillips and W. Layton1
Dept. of Geology, University of Durham
1Present address: University of Queensland, Brisbane, Australia.

Summary: An attempt is made to systematize the nomenclature of the calciferous and alkali amphiboles. The compositions of end-members can be plotted on a simple diagram, which can also be used to display the affinities of the naturally occurring minerals after deriving a basic atomic formula according to the rules given. The composition of an amphibole can in some cases be expressed quantitatively in terms of solid solution of two or three pure end-members.

Mineralogical Magazine; December 1964 v. 33; no. 267; p. 1097-1109; DOI: 10.1180/minmag.1964.033.267.05
© 1964, The Mineralogical Society
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