ca 84° 14' mill 90 32 ma 44 14 nd 90 18 SELENIUM. tC 52” 2 mt 33 63 nc 44 61 me 85 65 111 FIG-. c, m. Twins. Twin-face a. Cleavage. The crystals are at first transparent, but after exposure to the air become opaque. 2. SELENIUM.—Selen ; Hausmann, Ilaidinger. Brownish-blaek...lead-grey. In thin plates, red by trans mitted light. II = 2'0. G = 4‘3. Sublimes in the matrass. Melts at a little above 100° c; boils at 700° o. Se, selenium. Is found investing sulphur in Sicily. 3 DIAMOND—Diamond; Phillips. Diamant; Hauy. Oktaedrischer Demant j Mohs. Dcmant; llausmann, Hai- dinger. Cubic. a 100, o ill, d Oil, g 032, i 043, p 122, s 321. The forms o, p, s, are frequently hemihcdral with inclined taces. ad 90° o' gd 33° 41' pa O O 1 1> 32' oo' 70 32 9° 30 49 po la 48 oa 64 44 • */ a 10 10 pd 19 28 dd' 00 0 id 30 62 sa 30 42 dd 45 0 pp 27 10 80 22 13 do 85 10 pp. 38 67 i'l ‘ 1: 4 FIG. 85. FIG. 80. FIG. 87. Oil I
