Mineralogy Database

Larosite Mineral Data

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General Larosite Information

Help on Chemical  Formula: Chemical Formula: (Cu,Ag)21(Pb,Bi)2S13
Help on Composition: Composition: Molecular Weight = 2,256.15 gm
   Copper   53.51 %  Cu
   Silver    9.56 %  Ag
   Bismuth   9.26 %  Bi
   Lead      9.18 %  Pb
   Sulfur   18.48 %  S
           100.00 % 
Help on Empirical Formula: Empirical Formula: Cu19Ag2PbBiS13
Help on Environment: Environment: Central portion of a vein with chalcocite and stromeyerite.
Help on IMA Status: IMA Status: Approved IMA 1972
Help on Locality: Locality: Foster mine, Cobalt, Ontario, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Fred LaRose, a discoverer of silver ore at Cobalt.
Help on Name Pronunciation: Name Pronunciation: Larosite Say LAROSITE
Help on Synonym: Synonym: IMA1971-014