MIAEGTRITE. itz *4° ) 215 it' 53° 16' tc 70° 24' rr 75° 38' ss' 77 13 me 87 20 xx' 38 44 dd’ 95 59 cstf 96 10 m 69 6 r 115 64 c f 119 47 zv 8 8 33 106 21 7cb 35 34 hu 12 49 VP 141 1 zb 38 56 tv 29 11 ee & qc lo ho rc 00 10' 17 40 27 34 37 54 45 43 58 21 FIG. 221. FIG. 220. d & Combinations, cov, cod fa, ceosdfab, ciogpdnwa.s.f, acioxgvztr- hlq£, bxmtryzkvd. The fuces g, o, p striated parallel to their intersections with each other; i, n striated parallel to their intersections with each other. Cleavage, i, a imperfect. Frac ture imperfect conchoidal. Opaque. Lustre adamantine, in clining to metallic. Blnckish lead-grey, inclining to iron-hlack and steel-grey. In thin splinters hlood-red hy transmitted light. Streak cherry-red. Very sectile. ii = 2'5. g = 5'3...5'4. In the open tube melts easily, yields sulphurous acid and a sublimate of oxide of antimony. Before the blowpipe on char coal with soda yields a globule of silver. Partially soluble in nitric acid, leaving a residuum of sulphur and oxide of anti mony. Caustic potash dissolves out the sulphide of antimony. silver 35'86, antimony 42'73, sulphur 21'35. wAiT m 5 fflr H"*' Analysis of miargyrite from Briiunsdorf hy II. Rose Silver 30'40 Copper roe Iron 0'02 Antimony 3914 Sulphur 21'95
