622 MINERALOGY 



a. Yields a sulphur reaction with soda. Shows antimony ; 



p. 584. 

 Corynite, Ni(As.Sb)S; C. Tin-white; Str. Black; 



H. 4.5; G. 6; F. 2; I. 

 Wolfachite, Ni(As.Sb)S; C. Steel-gray; Str. Black; 



H. 4.5; G. 6.6; F. 2; IV. 



b. Yields a sulphur, but no antimony, reaction. 

 GERSDORFFITE, NiAsS; C. Tin- white ; Str. Black; 



H. 5.5; G. 5.8-6; F. 2; I; p. 316. 



c. Yields little or no sulphur reaction with soda. 

 NICCOLITE, NiAs; Pale copper red; Str. Brownish; 



H. 5-5.5; G.7.5; F. 2; III; p. 309. 

 Chloanthite, NiAs 2 ; Tin-white ; Str. Black ; H. 5.5-6 ; 



G. 6.9-7.2; F. 2; I; p. 315. 

 Rammelsbergite, NiAs 2 ; the same as chloanthite only 



orthorhombic. 



5. Roasted and treated as in 3 above, yields an iron reaction, 

 a. Yields with soda a sulphur reaction. 



ARSENOPYRITE, FeAsS ; Silver-white; Str. Black; 



H. 5.5-6; G. 6-6.2; F. 2; IV; p. 319. 

 6. Yields with soda no sulphur reaction. 



Lollingite, FeAs 2 ; Silver-white ; Str. Black ; H. 5-5.5 ; 



G. 7.2-7.3; F. 2; IV. 

 Leucopyrite, Fe 3 As 4 ; Practically the same as lollingite, 



massive. 



6. With von KobelFs flux shows lead. 



Sartorite, PbS. As 2 S 3 ; Lead-gray ; Str. Dark brown ; 



H. 3; G. 5.4; F. 1; IV. 

 Dufrenoysite, 2 PbS. As 2 S 3 ; Blackish gray ; Str. Black ; 



H. 3; G. 5.56; F.I; IV. 

 Guitermanite, 3 PbS.As 2 S 3 ; Bluish gray ; Str. Black ; 



H.3; G. 5.9; F.I; V. 

 Jordanite, 4 PbS.As 2 S 3 ; Blackish gray ; Str. Black ; 



H.3; G. 6.4; F. 1 ; V. 

 Baumhauerite, 4 PbS.3 As 2 S 3 ; Lead-gray ; Str. 



Brown ; H. 3 ; G. 5.33 ; Cl. Per. ; V. 



7. With von KobelPs flux shows bismuth. 



Alloclasite, Co(As.Bi)S ; Steel-gray; Str. Black; H. 



4.5; G. 6.6; F. 2; IV. 

 Bismutosmaltite, Co(As.Bi) 3 ; Tin-white; Str. Black; 



H. 6; G. 6.92; F. 2?; I. 



