wherry: sulfide; minerals 



491 



X:i DIVISION. 



SULFIDES, OXYSULFIDES, SELENIDES, TELLURIDES, NITRIDES, PHOS- 

 PHIDES, ARSENIDES, ANTIMONIDES, BISMUTHIDES, CARBIDES 

 AND SILICIDES OF METALS 



New; ratio X ranging from 3 to 11 ; part of 

 Dana's "basic division." 



New; included by Dana with native ele- 

 COHENITE GROUP. ISOMETRIC. . . j ^^^^^^ ^^^ evidently compounds. 



Cohenite (Ke,Ni)3-4C Meteoritic ; includes "chalypite." 



STUETZITE GROUP. HEXAGONAL . New. 



Stuetzite Ag3-4Te 



SCHREIBERSITE GROUP. TETRAG- / New; included by Dana under isometric 

 ONAL. \ native elements. 



Schreibersite (Fe,Ni)3-4P Meteoritic; includes "rhabdite." 



NON-CRYSTALLIZED GROUP New. 



I "Darwinite;" homogeneity affirmed by Mur- 

 doch, op. cit., p. 74, but discredited by 

 Borgstrom, Geol. for. fork. 38: 95. 1916. 



Homogeneity affirmed by Borgstrom, loc. 



cit., but questioned by Murdoch, op. cit., 



P- 37- 

 Homogeneity affirmed by Murdoch, op. cit., 



P- 135- 

 The formula AgeBi often given does not 



agree with the analyses; homogeneity 



affirmed by Murdoch, op. cit., p. 125. 



3 : 1 DIVISION New; part of Dana's "basic division." 



DYSCRASITE GROUP. ORTHORHOMBIC. 



Crystallization peri-hexagonal; includes 

 "condurrite," "keweenawite," "ledoux- 

 ite," "mohawkite," "orileyite," "stibio- 

 domeykite," etc., the heterogenous char- 

 acter of most of which has been shown 

 by Murdoch, op. cit., pp. 38-39. 

 "HuntiHte." 



vStibiotriargentite ;" includes "animikite," 

 "chanarcillite" and "stibiohexargentite," 

 impure forms. 

 5 : 2 DIVISION New; ratio somewhat variable. 



NON- CRYSTALLIZED GROUP New. 



f "Maldonite;" included by Dana with native 

 j elements, but has as much right to be 



"WMtneyite CugAs 



Algodonite CueAs 



Horsfordite CueSb 



Chilenite AgnBi 



Domeykite CusAs 



Arsenargentite AgsAs 



Dyscrasite AgsSb 



1 



Bismuthaurite Au2-3Bi 



Ferrosilicite Fe2-3Si 



called a compound as other members of 

 this division. 

 Meteoritic ; Shepard, Amer. Jour. Sci. [ i ] 28: 

 259- 1859. 



