gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1950.029.211.10 Paralaurionite1 Palache Charles Harvard University, Cambridge, Massachusetts, U.S.A.

Contribution from the Department of Mineralogy and Petrography, Harvard University.

 12 1950 29 211 341 345 Copyright © 1950, The Mineralogical Society 1950 Abstract

Paralaurionite from a new locality, the Mammoth mine, Arizona, is described. X-ray study and chemical analysis confirm the original characteristics of the mineral as described in 1899 by G. F. Herbert Smith. Measurements are given which establish new forms on crystals from Arizona and also on crystals from a South American locality. A complete angle table for twenty-eight forms is presented.