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ASTIMOXITE. 175 FIG. 171. FIG 172. Combinations. sma,pma, pvma, svpma, sxepvma. The faces of the zone ma striated parallel to their in tersections with each other. Cleavage, a, very perfect; c, in, b less perfect. Fracture conchoidal, small and imperfect. Opaque. Lustre metallic. Lead-grey, inclining to steel-grey ; acquires a steel-blue or iridescent tarnish. Streak lead-grey. Sectile. In thin leaves flexible, li = 2 - 0. g = 4 p 6...4'7. In the open tube yields first a sublimate of antimonious acid, and then of oxide of antimony. Before the blowpipe on charcoal melts very readily, imparts a green colour to the flame, is volatilized, and deposits a white sublimate on the charcoal. Is soluble when pure in warm hydrochloric acid; usually leaves a small quantity of chloride of lead. Decomposed by nitric acid, leaving oxide of antimony. Decomposed by caustic potash, forming with it a yellow solution, which yields a yellowish red precipitate on the addition, of an acid. SbS p1 , antimony 72 p 89, sulphur 27 - ll. Analyses a by Bergman, b by Thomson, c by J. Davy, d by Brandos, e from Arnsbcrg in Westphalia by Schnabel:— Antimony . Iron Sulphur lu long columnar or acicular crystals, radiating columnar, fibrous and granular masses, and disseminated. Occurs usually in veins in granite and slate rocks, either alone or with gold, silver and ores of lead and other metals, sometimes in beds in chalybite. Is found near Posing not far from Presburg, Felsobanya, Kremnitz, Schemnitz, Magurka a»d other places in Hungary, Kapnik in Transylvania, Briiuns- aorf near Freiberg in Saxony, Michclsberg and Przibram in i 4 a b C d e 74 73*77 74*06 735 72-02 — — — 0-13 20 26*23 25*94 2(3'5 27-85