624 MINERALOGY 



Diaphorite, 5 (Pb.Ag 2 )S.Sb 2 S 3 ; Steel-gray; Str. Black; 



H. 2.5-3 ; G. 5.9-6 ; F. 1 ; IV. 

 Freieslebenite, 5 (Pb.Ag 2 )S.2 Sb 2 S 3 ; Steel-gray; Str. 



Black ; H. 2-2.5 ; G. 6.3 ; F. 1 ; V. 

 P. Shows lead, but no silver. 

 Zinkenite, PbS.Sb 2 S 3 ; Steel-gray; Str. Black; H. 3- 



3.5; G. 5.35; F.I; IV; p. 320. 

 Plagionite, 5 PbS.4 Sb 2 S 3 ; Blackish-gray ; Str. Black ; 



H. 2.5*; G. 5.4; F. 1 ; V. 

 Warrenite, 3 PbS.2 Sb 2 S 3 ; Blackish-gray; Str. Black; 



F. 1 ; Capillary. 

 JAMESONITE, 2PbS.Sb 2 S 3 ; Blackish gray; Str. 



Black; H. 2-3; G. 5.5-6; F.I; IV; p. 330. 

 Semseyite, 7 PbS.3 Sb 2 S 3 ; Gray; Str. Black; G. 5.95; 



F. 1 ; V, Tabular. 

 BOULANGERITE, 3 PbS.Sb 2 S 3 ; Bluish lead-gray ; 



Str. Black; H. 2.5-3; G. 5.88; F. 1 ; p. 321. 

 Meneghinite, 4 PbS.Sb 2 S 3 ; Blackish gray; Str. Black; 



H. 2.5 ; C. pinacoidal ; G. 6.35 ; F. 1 ; IV. 

 Geocronite, 5 PbS.Sb 2 S 3 ; Lead-gray ; Str. Black ; 



H.2.5; G. 6.4; F. 1 ; IV. 

 Kilbrickenite, 6PbS.Sb 2 S 3 ?; Lead-gray; Str. Black; 



H. ? ; G. 6.4 ; Massive. 

 Epiboulangerite, 3 PbS.Sb 2 S 3 ; Blackish gray ; Str. 



Black; H. ?; G. 6.31 ; F.I; IV? 

 y. With von KobelPs flux shows lead ; roasted in the 



O. F., and the infusible residue reduced with soda, 



yields tin. 

 Cylindrite, 6 PbS, 6 SnS 2 , Sb 2 S 3 ; Blackish gray ; Str. 



Black ; H. 2.5-3 ; G. 5.42 ; F. 1.5 ; 

 Franckeite, 5 PbS, 2 SnS 2 , Sb 2 S 3 ; Blackish gray ; Str. 



Black ; H. 2-2.5 ; G. 5.55 ; F. 1 ; Tabular. 

 . With von KobelPs flux shows no lead. 

 a. Reduced with soda yields silver. Shows sulphur 



when fused with soda. 

 PYRARGYRITE, 3 Ag 2 S, Sb 2 S 3 ; Dark red to black ; Str. 



Purplish red ; H. 2-2.5 ; G. 5.8 ; F. 1 ; III ; p. 322. 

 STEPHANITE, Ag 5 SbS 4 ; Iron-black ; Str. Black ; H. 



2-2.5; G. 6.3; F, 1; IV; p. 325. 

 POLYBASITE, 9 (Ag.Cu) 2 S, Sb 2 S 3 ; Iron-black ; Str. 



Black ; H. 2-3 ; G. 6.2 ; F. 1 ; V ; p. 326. 



