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622 CHLORIDES WITH OXIDES AND CARBONATES. Analyses of mendipite a from the Kunibert mine near Brilon by Schnabel, I from Brilon, G = 7*0, by Rhodius, c from Churchill by Berzelius :— a b c Oxide of lead 61*26 60*io 60*18 Chloride of lead .... 38*74 39*07 39*82 Is found in columnar crystalline masses, with other ores of lead, calcite and earthy black manganese, at Churchill in the Mendip Hills in Somersetshire, and at Brilon in Westphalia. 456. PHOSGENITE.—Murio-carbonate of lead; Phillips. Plomb carbonate inuriatifere ; Hauy. Orthotomer Blei-Baryt; Mohs. Hornblei; Hausmann. Phosgenit; Haidinger. Pyramidal. 101,001 = 47° 19'*6. a 100, e 001, e 101, m 110, u 210, x 111, * 211. d truncates the edge xx. TIG. 638. ae ad ma ua um ee xc 90 90 45 o' 0 0 26 34 18 26 94 39 56 54 xrn rr XX xd sa sc sm 33 6 113 48 72 39 34 13 67 36 28 34 48 50 Combinations, cmax, cmau, cmaex, cmaux, cmauxs. Cleav age. a; m; c. Fracture conchoidal. Transparent...trans lucent. Lustre adamantine, inclining to waxy. Colourless, white, passing into grey, yellow, green, brown. Streak white. Brittle, h = 3*0. g = 6*0...6*2. Before the blowpipe in the outer flame melts readily into an opaque yellow bead, which becomes white and crystalline on cooling. On charcoal in the inner flame yields acid vapours and is reduced to metallic lead. Is soluble with slight effer vescence in nitric acid. PbCl + PbC, chloride of lead 61*00, carbonate of oxide of lead 49*00. Analysis by Dr. R. A. Smith :— Chloride of lead 61*78 Carbonate of oxide of lead . . 48*22 Phosgenite has been found, in crystals and globular masses, in Cromford level near Matlock in Derbyshire, Cornwall, and is said to have been found on Vesuvius, Badenweiler in Baden, and Southampton in Massachusetts. e>