Miargyrite

Miargyrite is a mineral, a sulfide of silver and antimony with the formula AgSbS2. It is a dimorph of cuboargyrite. Originally discovered in the Freiberg district of Germany in 1824, it has subsequently been found in many places where silver is mined. It usually occurs in low temperature hydrothermal deposits. and forms black metallic crystals which may show a dark red internal reflection. The streak is also red.

Miargyrite
Miargyrite, San Genaro Mine, Castrovirreyna District, Peru (size: 6.1 x 4.2 x 2.7 cm).
General
CategoryMineral
Formula
(repeating unit)
AgSbS2
Strunz classification2.HA.10
Crystal systemMonoclinic
Crystal classPrismatic (2/m)
(same H-M symbol)
Space groupC2/c
Identification
Mohs scale hardness2-2 12
Streakred
Specific gravity5.2
References[1][2][3]

Miargyrite is named from the Greek meyon, "smaller" and argyros, "silver," as its silver content is lower than most silver sulfides.

References

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