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ALABANDINE. 167 g h i k I m Sulphur . . 32-10 33-22 33 4 32'G 33'0 33'73 Water . . 0'80 — earthy matter l'o — According to Boussingault black varieties of blende (marma- tite) from Candado and Salto near Marmato not far from Popayan, consist respectively of:— Sulphide of zinc . . . 77"5 76'8 Sulphide of iron . . . 22-5 23'2 In attached crystals, granular and fibrous masses, botryoidal. Is very widely diffused, in veins and beds, especially in crystal line slate and transition rocks with galena, pyrite, tow-anite, in veins, with ores of silver and arseniurets. Is found at Schemnitz in Hungary, Kapnik in Transylvania, Przibram in Bohemia, ltaibel in Carinthia, Geroldseck in the Breisgau, Scharfenberg, Schwarzenborg, Preiberg in Saxony, Goslar, Lautenthal, Zellerfeld, Andreasberg and Xeudorf in the Harz, Sweden, Derbyshire, Flintshire, St. Agnes in Cornwall, Clifton lead mine near Tyndrum in Perthshire, Lead Hills, in the coal field around Edinburgh, Cumberhead in Lanarkshire. Cleavablo masses have been obtained by fusing together zinc and sulphur. 57. ALABAXI)IXE.—Sulphuret of manganese ; Phillips. Manganese sulfure ; Hauy. llexaedrische Glanz-Blende ; Mobs. Manganblende; Hausmaun. Alabandin; Haidinger. Cubic. a 100, o ill, d oil cleavage. aa' 90° o' oa 61 41 (fig. 138.) daf 46 0 Twins. Twin-face o. Cleavage, a, perfect; d, traces. Fracture uneven, imperfect conchoidal. Opaque. Lustre me tallic, imperfect. Jron-black...dark steel-grey ; acquires a brownish-black tarnish. Streak dark green. Slightly brittle, u = 4-o. u = 3-05...4-014. Does not conduct electricity. In the matrass unchanged. In the open tube yields sul phurous acid, and becomes greyish-green. Before the blowpipe on charcoal, after previous roasting, melts with difficulty in the inner flame into a brown slag. With borax gives the reaction °f manganese. Soluble in salt of phosphorus with copious evolution of a combustible gas. Soluble in hydrochloric acid with evolution of sulphuretted hydrogen.