General Information:
Chemical Formula:
Ag8(Sb,As)Te2S3
Composition:
(Molecular Weight = 1,312.68 gm)
Silver 65.74 % Ag
Antimony 4.64 % Sb
Tellurium 19.44 % Te
Arsenic 2.85 % As
Sulfur 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
More details...