General Information:
Chemical Formula:Ag8(Sb,As)Te2S3
Composition:(Molecular Weight = 1,312.68 gm)Silver 65.74 %
AgAntimony 4.64 %
SbTellurium 19.44 %
TeArsenic 2.85 %
AsSulfur 7.33 %
S Empirical Formula: Ag8Sb0.5As0.5Te2S3
IMA Status:Approved IMA 1985
Locality:Moctezuma mine, Moctezuma, Sonora, Mexico.
Name Origin:Named for Benjamin F. Leonard (1921-), U.S. Geologist.
Physical Properties: Color:gray or black.
Diaphaniety:Opaque
Habits:Microscopic Crystals - Crystals visible only with microscopes., Anhedral Grains - Granular minerals without the expression of crystal shapes,
Hardness:3.5 - Copper Penny
Luster:Metallic
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