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50G HYDROUS ARSEHIATES AHD PHOSPHATES. ■=, m'P r- OiToi J. T* 335. IIAIDINGEEITE.—Haidingerite; Dufrenoy. Pris- matisches Enklas-Haloid; Mohs. Haidingerit; Ilausmann, Haidinger. Prismatic. 011,010 = 59° 16'; 101,001=26° 3l'; 110,100=50° o'. 041, t 101, m 110, a 100, b 010, g 012, Tc 021 s 241, n 452. T Vk . . tt T o> - T %■ - £5* ~ -v k¥ 99 ta tt' ma _ ba r 134° 23 99 62 33 7 63 29 53 2 60 0 90 0 S S nn! tf nn n'n" 80° 0' 42 19 118 33 137 35 63 14 120 28 121 37 FIG. 504. Combinations, gthmab, gtlcnismab. The faces g, 7c, i rough ; s, n rounded. Cleavage, a, very perfect and easily obtained. Transparent...semi-transparent. Lustre vitreous. White. Streak white. Sectile. In thin plates flexible. 11 = 2-0...2’6. G = 2'848 In the matrass yields water. Melts before the blowpipe into a white enamel. Upon charcoal in the inner flame emits a smell of arsenic. Soluble in nitric acid. Ca J As + 4H, arsenic acid 55'54, lime 27‘06, water 17'40. Analysis by Turner:— Arseniate of lime . . . 85-68 Water 14-33 In attached crystals elongated in the direction of the edge ab, and crystalline crusts, associated with pharmacolite. This very rare mineral is supposed to have been found at Joachimsthal in Bohemia. 33G. PIIABMACOLITE.—Pharmacolite; Phillips. Chaux arseniate; Hauy. llemiprismatisches Euklas-IIaloid ; Mohs. Pharmakolith; Ilausmann, Ilaidinger. Oblique. 101,100 = 64° 68'; 111,010 = 73° 60'; 101,001 =l£l6'. b 010, c 001, n oil, m 110, s 310, x 321.