12 
1. Tesserale binare Yerbin dungen. 
1. B omit. (Gu + h Fe). 
(Buntkupfererz). 
Spaltbar O. (a) = Gu; (b) = Fe. 
V, Bornit (4a + b) 
V 2 do. (2a + b) 
% do. (3a + 2b). 
2. Kobaltkies. (14 H- nR). 
(Carrolit , Kobaltsulphuret). 
Spaltbar O (a) = R; (b) = R. R = (Co, Ni, Cu, Fe). 
A-Kobaltkies (a) 
Vs do. (3a F b). 
Vx do. (a + b) 
7i do. (a + 2b). 
3. Ni ekelg'la nz. (RQ + nRQ 2 ). 
(Gersdorfit, Araoïbit). 
Spaltbar x O (a) = RQ; (b) = RQ 2 . R = (Ni, Co, Fe); 
Q = (As, S). 
V 2 Nickelglanz. (2a + b) 
Vi do. (a + b) 
3 /i do. (a A 3b) 
% do. (a -f- 6b) 
B-Nickelglauz (b). 
4. Speiscobalt. (R As 2 + nRAs 3 ) 
(Tesseralkies). 
Spaltbar *Ox und O. (a) = R As 2 ; (b) = R As 3 . R = (Co, Ni, Fe). 
A-Speiscobalt (a) 
Va do. (2a 4- b) 
Vx do. (a b) 
B-Speiscobalt (b). 
