MIMETITE. 481 berg, Schwarzenbach, Windisch-Kappel and some other places, Annaberg in Austria, Rezbanya in Hungary, Szaska in the Banat, Badenweiler in Baden, Mauknerotz in the Tyrol, Schnee- berg and Johann-Georgenstadt in Saxony, Holienthal near Werdenfels in Bavaria, in the lead mines of Southampton in Massachusetts, and of Perkiomen in Pennsylvania, Chile, Zima- pan in Mexico, at a place five wersts south of the source of the Aura in the Kirghise steppes. AESENTATES, PHOSPHATES. 311. KUHNITE.—Chaux arseniatee anhydre ; Dufrenoy. Berzeliit; ITausmann. Berzelit; Haidinger. Cleavage in one direction. Fracture uneven. Lustre waxy, yellowish-white,honey-yellow. Brittle, n = 5’0...6'0. 0 = 2-52. Becomes grey before the blowpipe. Infusible. 'With soda yields the reaction of manganese. Soluble in nitric acid. R 3 As, where It is lime, magnesia and protoxide of man ganese. Analyses by Kuhn:— Arsenic acid 66’46 Lime 20-06 Magnesia . 1S'68 15’61 Protoxide of manganeso . 2-13 4-26 Loss by ignition .... 0-30 2-05 Insoluble — 0-23 Is found in cleavable masses at Langbanshytta in Sweden. 312. MIMETITE.—Arseniate of lead ; Phillips. Plomb arseniate; Hauy. Braehytyper Blei-Baryt; Mohs. Mi- aietesit; Ilausmann. Mimetit; Haidinger. Rhombohedral. 100,111 = 66° i8'-6. 0 111, 153. a Oil, b 211, r loo, r. 122, X 120, ao 00° 0' txa 40° 6' rr t 112° bo 00 0 zo 60 0 rr 03 aa 60 0 za 30 0 r'r / 40 lb" 80 0 VO 73 64 ra! 43 ba 30 0 va 16 6 xxf 38 xo 40 64 ro 66 19 xa 70 Y