Argentojarosite

Argentojarosite is an iron sulfate mineral with the chemical formula AgFe3+3(SO4)2(OH)6. It is one of few iron sulfate minerals containing silver in its chemical formula as a dominant element.[2] Its type locality is the East Tintic Mountains, Utah.[2][3]

Argentojarosite
Argentojarosite found in Sonora, Mexico
General
CategorySulfate mineral
Formula
(repeating unit)
AgFe3+3(SO4)2(OH)6
IMA symbolAgjrs[1]
Strunz classification7.BC.10
Dana classification30.2.5.5
Crystal systemTrigonal
Crystal classDitrigonal pyramidal (3m)
Space groupR3m
Identification
ColorYellow, yellow-brown, brown
Crystal habitCoatings, fine-grained masses
Cleavage{0001} distinct
Mohs scale hardness3.5-4.5
LusterVitreous
StreakLight yellow
Specific gravity3.66
Density3.66 (measured), 3.81 (calculated)
Optical propertiesUniaxial (-)
PleochroismDichroic,
O: Yellow,
E: Pale yellow
References[2][3]

References

Bibliography

  • Palache, P.; Berman H.; Frondel, C. (1960). "Dana's System of Mineralogy, Volume II: Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. (Seventh Edition)" John Wiley and Sons, Inc., New York, pp. 565.
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