MEKDIPITE. G21 FIG. 636. ec 60° 26' mm! 00° O' ee 76 64 rr ! 82 2 ee" 120 62 // rr 136 10 me 00 0 er 41 1 Cleavage, c, not very easily obtained. Fracture uneven and slightly conclioidal. Transparent...translucent. Lustre ada mantine, occasionally pearly. Yellowish, with sometimes a greenish tinge. II = 2 P 5...3'0. G = 7'2l. Decrepitates when heated. Fusible before the blowpipe into a greyish-yellow globule. PbCl + Pb, chloride of lead 65-46, oxide of lead 44-63. Analysis by Dr. It. A. Smith :— Chloride of lead .... 65'18 Oxide of lead 44"30 1 Water 0-07 Was found in tabular crystals, generally thin and superim posed on each other, and occasionally slightly curved, in old heaps from the Cromford level near Matlock. 455. MENDIPITE.—Kerasine; Beudant. Peritomer Blei- Baryt; Molis. Mendipit; Hausmann, llaidinger. Prismatic. 001, m 110. a loo, I 010, c FIG. 637. ac 0O U be 00 ah 00 ma mb mm 38 42 77 24 Cleavage, m, very perfect; a, b, less perfect. Fracture conehoidal...uneven. Translucent. Lustre, adamantine inclin- ing to pearly on tho cleavages. Yellowish-white, straw-yellow, pale red, pale blue. Streak white. n = 2-5...3-0. g = 7-o...7'1. Decrepitates when heated. Melts readily before the blow pipe into a yellow globule. On charcoal is easily reduced, emitting acid fumes. Fused with salt of phosphorus and oxide of copper, imparts a blue colour to the flame. Is readily soluble in nitric acid. PbCl + 2Pb, chloride of lead 38 - 30, oxide of lead 61-61.