gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1973.039.301.07 A New Occurrence and a Structural Interpretation of the Sanidine Nevada Twin Sabatier G. Centre de Recherches sur la Synthèse et la Chimie des Minéraux Rue de la Ferdlerie 45045 Orleans-Cedex, France 3 1973 39 301 54 57 24 3 1972 Copyright © 1973, The Mineralogical Society 1973 Summary

A new example of the Nevada twin from the Mont-Dore (Massif Central, France) is described. A structural interpretation of the twin is given assuming a (02¯1) composition plane parallel with the chains of the feldspar structure.