| Argentojarosite | |
|---|---|
 | |
| General | |
| Category | Sulfate mineral |
| Formula (repeating unit) | AgFe3+3(SO4)2(OH)6 |
| IMA symbol | Agjrs[1] |
| Strunz classification | 7.BC.10 |
| Dana classification | 30.2.5.5 |
| Crystal system | Trigonal |
| Crystal class | Ditrigonal pyramidal (3m) |
| Space group | R3m |
| Identification | |
| Color | Yellow, yellow-brown, brown |
| Crystal habit | Coatings, fine-grained masses |
| Cleavage | {0001} distinct |
| Mohs scale hardness | 3.5-4.5 |
| Luster | Vitreous |
| Streak | Light yellow |
| Specific gravity | 3.66 |
| Density | 3.66 (measured), 3.81 (calculated) |
| Optical properties | Uniaxial (-) |
| Pleochroism | Dichroic, O: Yellow, E: Pale yellow |
| References | [2][3] |
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]
