Ti.u.riuuM Mr 



825 



Blade; str. Black: II 

 shows bismuth, 6, 



Miargyrite, AK-,> : Iron-M r. 



11.2-2.5; (I. :._'. I . 1 ; V. 

 Polyargyrite, 12 AgzS, SbjS, ; 



2.5; C,.ii.'.7; F. 1 ; V. 

 P. With von Kobell's flux 



p. 580. 

 Kobellite,2 PbS.(Bi.Sb) 2 S 3 ; Blackish gray; Str. Black; 



H. 2.5-3; G.6.3; F.I. 



2. Yields silver, but shows no sulphur. 



Dyscrasite, AgaSb ; Silver-gray ; Str. Gray ; H. 3.5-4 ; 

 G. 9.75; F. 1.5; IV. 



3. Yields a magnetic residue after treatment in the R. F. ; 



yields a sulphur reaction with soda, but contains no 

 copper, lead, or silver. 



BERTHIERITE, FeS.SbzSsj Steel-gray; Str. Black; 

 H. 2-3; G. 4.2; F. 2; p. 320. 



4. Well roasted and dissolved in borax, yields a nickel reac- 



tion ; p. 574. 

 a. With von Kobell's flux shows bismuth. 



Kallilite, Ni(Sb.Bi)S; Light bluish gray; Str. Black; 



G. 7.01 ; Massive. 

 Hauchecornite, Ni(Bi.Sb)S; Bronze-yellow; Str. 



Black; H. 5; G. 6.4; II or Massive. 

 6. Yields no bismuth. 



+ . Shows sulphur with soda. 



Ullmannitei NiSbS; Silver-gray; Str. Black; Cl. 



Cubic; H. 5.5; G. 6.5; F. 1.5; I; p. 311. 

 . Shows no sulphur with soda. 

 Breithauptite, NiSb; Copper-red; H. 5.5; G. 7.54; 



F. 1.5-2; III; p. 309. 

 III. The coat is white, and colors the inner blue cone of the flame 



bright green. The presence of tellurium may be 



proven by the tests in b, p. 587. 



A . With von Kobell's flux shows lead. 



Altaite, PbTe ; Tin-white ; Str. Gray ; Cl. Cubic ; H. 



3; G. 8.16; F. 1.5; I. 

 Nagyagite, Au 2 Pb 14 Sb3Te 7 S,7? ; Gray; Str. Black; H. 



1-1.5; G. 7.02; F. 1.5; IV. 



B. With von KobelVs flux shows bismuth. 



Tetradymite, Bi 2 Tc 3 ; Tin-white ; Str. Gray ; Cl. Basal ; 



H. 1.5-2; G. 7.4; F. 1.5; III. 



2s 



