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176 SULPHIDES. Bohemia, Neudorf, Wolfsthal and Andreasberg in the Harz, Arensberg in Westphalia, Auvergne and other places in France, Wolfach in Baden, Leogang near Salzburg, Sehladming in Styria, Lavantthal in Carinthia, Hold Kronach in Baireuth, Schlangenberg in Siberia, Loretto in Tuscany, Padstow in Cornwall, Grlendinning in Dumfriesshire, Spain, North and South America. 64. OBPIMENT.—Orpiment; Phillips. Arsenic sulfure jaune; Ilauy. Prismatoidischer Schwefel; Mohs. Kausch- gelb; Hausmann. Operment; Haidinger. Prismatic. 011,010=41° 45'; 101,001=33° O'; 110,100=59°64'-5. a 100, b 010, 0 Oil, m 110, u 210, p ill, v 211. b truncates the edge mm', m truncates the edge ub, v truncates the edgepa. ob 41° 45' 00' 90 30 ua 39 40 ma 58 55 ba 90 0 mm' 100 40 ( Combinations, prnu, opmu, opua, opvmub, abomu. The faces a rough but even; m, u striated parallel to their intersections with a. Cleavage, a, very perfect; b, traces. Semi-transparent ...translucent on the edges. Lustre resinous ; on the cleavage a pearly, inclining to metallic. Lemon-yellow, inclining to orange-yellow. Sectile. In thin leaves Hexible. 11 = 1-5. o = 3-48. In the matrass yields a dark yellow or red sublimate. In the open tube burns, yields sulphurous acid, and deposits a sublimate of arsenious acid. Fused with soda yields metallic arsenic. Soluble in nitromuriatic acid, caustic potash and ammonia. AsS 3 , arsenic 0O'95, sulphur 39'05. Analyses of orpiment by Klaproth and Laugier:— Arsenic .... 62 01 -80 Sulphur .... 38 38'14 In imbedded crystals; botryoidal, renifonn, stalactitic, massivo mm? 62° 11' va 48 3 pa 65 48 oa 90 0 pb 47 10 pm, 37 27 fig. 173. a?