Sulle associazioni poligeniche ecc. 
547 
ARSEIIURI e ÌITIUOIILRI 
lo 100 molecole di minerale sono; 
( 11 BREITHAUPT1TE. 86 NiSb + 12 Pb S, 2 fe S 4 . 
s j | [ ARSENICHELIO . 94 Ni As -4- 2 fe S 4 , 4 Ni. 
i SMALT1NA. . . 64 NiAs -4- 30 Co 4 S 3 , 4 Co S 4 , 2 fe S 4 . 
/ 60 Co is 4 -4- 10 fe As 4 , fi As 4 S 3 , 25 As. 
I 46 {Co Ni) As 4 + 20 fe As 4 , 34 As. 
/I (SMALTIRÀ . . 63 Ni As 4 -4-10 fe As 4 , 36-Co 4 As 5 , Cu 4 As. 
| \ 63 Fe As 4 - 4 -44 Co 4 As 4 , 3 Cu 4 S. 
li f GERSDORFFITE . 57 Ni As 4 - 4 - 16 NiS, 27feS 4 . 
s) (96 Fe As 4 +4 feS 4 . 
OS 1 /LEUCOP1RITE . j 90 FeAs 4 -f- 7 As, 3 feS 4 . 
f s V 94 FeA$*+ 6feS 4 . 
| RAMMELSBERG1TE 95 Ni(As Fi) 4 -4- 5 Cu 4 S, Cu. 
ISKUTTERUDITE. 39 Co A* 4 -4- 68 As, 3 fe As 4 . 
DARWINITE . 
WITHENEYITE 
ALGODONITE. 
DOMEYKITE . 
DIMORF1NA . 
D1SCRAS1TE . 
CUBANO . . 
WOLKiTE . . 
Appendice 
88 Cu -4- 22 Co 4 As, Ir. Ag. 
86 Cu H- 23 Co 4 As, tr. Ag. 
65 Cu 34Cu 4 As, tr.Ag. 
50 Cu -4- 50 Co 4 As. 
76 j4sS -*- 24 As? 
83 Ag + 17Ag 4 Sb. 
» 39,01 S-4-19,80 Co-4-38,01 fe-4-2,30 silise. 
» 28,60 S -4- 16,64 Sb -4- 6,03 As -4- 29,90 Pb 
+ 17,35 Cu ■+• 1,40 fe. 
