gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1969.037.288.14 Short Communications Arthurite from Potrerillos, Atacama Province, Chile Clark A. H. Department of Geological Sciences Queen's University Kingston, Ontario Sillitoe R. H. Instituto de Investigaciones Geológicas, Casilla 10465 Santiago, Chile 12 1969 37 288 519 520 20 3 1969 Copyright © 1969, The Mineralogical Society 1969