gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1985.049.350.08 Schultenite from King County, Washington, USA; a Second Occurrence, and Review Falls R. Department of Mineralogy and Geology, Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario, Canada M5S 2C6 Cannon B. Bart Cannon Minerals, 1041 NE 100 Street, Seattle, Washington, USA 98125 Mandarino J. A. Department of Mineralogy and Geology, Royal Ontario Museum, 100 Queen's Park, Toronto, and Department of Geology, University of Toronto, Toronto, Ontario, Canada M5S 2C6 3 1985 49 350 65 69 27 7 1983 23 7 1984 Copyright © 1985, The Mineralogical Society 1985 Abstract

Schultenite, PbHAsO4, known only from Tsumeb, Namibia, has been identified from a second occurrence: near North Bend, King County, Washington, USA. It occurs as euhedral crystals in a quartz-arsenopyrite-galena vein. It has a measured density of 6.07(3) g/cm3 and a calculated density of 6.079(4) g/cm3. The white to colourless crystals have a white streak, adamantine lustre, and fluoresce dull yellow under long wave ultraviolet light. Schultenite is monoclinic. Pa or P2/a; the unit cell parameters refined from the X-ray powder diffraction data are: a 5.827(3), b 6.743(3), c 4.847(3) Å, β 95.34(5)°; V 189.6(1) Å3; Z = 2; a:b:c = 0.8642:1:0.7188. The forms {010}, {001}, and {3¯22} were observed on the Washington schultenite crystals.

 Keywords schultenite King County Washington