164 SULPHIDES. „ 1S ■ nC ! ^probable *hat faces r, e, may belong to one of the individuals of a twin-crystal, and r, e to‘the other. On account of the extreme slenderness of the crystals in which the faces r e, were observed, it has not been found possible to verify this conjecture. o4. EISENNICKELKIES.—Eisennickelkies ; Trn.nsinn.nn Cubic. Cleavage apparently parallel to the faces of an octahedron. Fracture uneven. Opaque. Lustre metallic. Light pinch beck-brown. Streak rather darker. Brittle, h = 3-5. 4-0 G = 4'6. JNot magnetic. Chemical characters the same as those of pyrrhotine, except that when fused with borax in the inner flame, after being vss “ “ d w 5 2FeS + NiS, iron 41-04, nickel 22-11, sulphur 35-95. Analysis by Scheerer :— Iron . . . 4o-2i Nickel . . 21-07 Copper . . 1-78 Sulphur . . 36-fli Is found in crystalline masses with towanite, in grcenish- black amphibole, near Lillehammer in Norway. 55. GBEENOCKITE. — Cadmium sulfure ; Dufrdnoy. Greenockit; Hausmann, Haidinger. Ehombohedral. 100,111 = 58° 47'. o 111, a Oil, b 211, i 231, X 120, z 131, V 153. i truncates the edge ad; v truncates the edge za. The forms h z, v are frequently hemihedral with inclined faces. ao O O O o' ZO 62° 18' ad 60 0 VO 75 18 ah” 30 0 • V 11 21 32 io 25 28 XX 40 22 SCO 43 37 zz 62 33 Combinations. / / . / , . axz, oaxz, oaxz, oaix FIG. 162. oaxi