490 



wherry: sulfide minerals 



2:3 DIVISION New. 



TETRADYMiTE GROUP. TRIGONAL . Separated but not named by Dana. 



Tetradymite Bi2S3.2Bi2Te3 



J Dana's "tetradymite, variety i ;" name a 

 TeUurobismuthite . . . BisTes j translation of "telkirwismuth." 



HYDROUS ARSENIC SULFIDE- 



GROUP. TETRAGONAL New. 



Described, without name, by E. Monaco, 

 Ann. Scuoli Agric. Portici, [2], 4:7-11. 

 1903. Sometimes indexed by the Ger- 

 man name "arsenschwefel," but this is 

 not a satisfactory mineralogical term. 



(Hydrous arsenic 



sulfide) AS2S3.H2O 



i 



STIBNITE GROUP. ORTHORHOMBIC. 



Crystallization monoclinic, but peri-rhom- 

 bic. 

 Included here for simplicity. 

 "Antimonite." 



Orpiment AS2S3 



Kermesite Sb203.2Sb2S8 



Stibnite Sb2S3 



Bismuthinite Bi2S3 



Antimoniferous 



var (Bi,Sb)2S3 



Guana juatite Bi2S3-2Bi2Se3 



Distinctness aflfirmed by Murdoch, Micr. 

 detn. opaque min., p. 131. 1916. 



Selenobismuthite.. . .Bi2Se3 



(Amorphous or- 

 piment) AS2S3.XH2O 



Name an abbreviated translation of "selen- 

 wismuthglanz." 

 NON-CRYSTALLIZED GROUP New. 



Probably the form of arsenic sulfide which 

 occurs in hot-spring deposits; not yet as- 

 signed a special name; not in Dana. 



Metastibnite Sb2vS3.xH20 



Karelinite Bi203.2Bi2S3 



Amorphous, colloidal. 

 f "Bolivite;" an oxysuLfide of uncertain homo- 

 \ geneity; classed by Dana as a variety of 

 [ bismite. 



1:2 DIVISION New. 



MOLYBDENITE GROUP. TRIGONAL. 



Molybdenite M0S2 



NON-CRYSTALLIZED GROUP. .... .New. 



J Cornu, Z. Chem. Ind. KoUoide, 4: 190, 1909; 

 Jordisite M0S2 j (^ot in Dana) ; amorphous, colloidal. 



Tungstenite WS2 



I :X DIVISION New; ratio X ranging from i -f to 6 



NON-CRYSTALLIZED GROUP New. 



[ Sometimes grouped with the native ele- 

 Arsensulfurite ASS4-6 \ ments, but the constituents seem likely 



[ to be combined. 

 Patronite VS3-4 



