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618 HYDROUS CHLOEIDES. cooling a warm saturated solution of iodide of mercury in an aqueous solution of iodide of mercury and potassium. These crystals are pyramidal; 101,001 = 66° 37'. a 100, c ooi, x ill. ac 90° o' xa 48 12 xe 70 30 xxf 83 36 Heated to a cert point, they become yellow; at a higher temperature they melt and sublime, form ing yellow crystals belonging to the prismatic system (me = 90°, mm! = 66°, fig. 632), which on cooling again become red. fig. 631. FIG. 632. HYDROUS CHLORIDES. 451. BEMOLINITE.—Muriate of copper; Phillips. Cuivre muriate; Hauy. Prismatoidischer Habronem-Malachit; Mohs. Smaragdochalcit; Hausmann. Atacamit; Ilaidinger. Prismatic. 011,010=41° 29'; 101,001=37° 10'; 110,100=66° 10'. a 100, h oio, u on, e 101, m lio, s 210, x 410, r in. u truncates the edge rr. fig. 633. ab 90° o' xa O o C3 28' uv! 97 2 xx’ 139 4 ea 62 50 ra 63 20 ee' 74 20 rm 36 18 ma 66 10 rr 63 20 mm 67 40 /t rr 84 4 sa 36 43 / tf rr 107 24 ss' 106 34 Combinations, em, earn, ubm, rlauem, raemsx, rbaeums. The faces m, a striated parallel to their intersections with each other. Cleavage, a, perfect; u, less perfect. Fracture con- choidal. Semi-transparent...translucent on the edges. Lustre vitreous, inclining to resinous. Green of various shades. Streak apple-green. Bather brittle, h = 3'0...3'o. G = 3’69...3'71. In the matrass yields water and hydrochloric acid. Before the blowpipe imparts a green colour to the flame, and melts