Allargentum
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| Allargentum | |
|---|---|
 Allargentum on carbonate; size 3.2×2.7×1.4 cm |
|
| General | |
| Category | Sulfide mineral |
| Chemical formula | Ag1-xSbx |
| Strunz classification | 02.AA.30 |
| Dana classification | 02.02.01.02 |
| Crystal symmetry | Hexagonal – dihexagonal dipyramidal, H-M symbol (6/m 2/m 2/m), space group P63/mmc |
| Unit cell | a = 2.945 Å, c = 4.77 Å, Z = 2 |
| Identification | |
| Color | Silver gray |
| Mohs scale hardness | 4 |
| Luster | Metallic |
| Diaphaneity | Opaque |
| Specific gravity | 10.0 (meas.), 10.12 (calc.) |
| References | [1][2] |
Allargentum is a mineral from the class of antimonides, superclass of sulfides and sulfosalts (sometimes ascribed to the natural elements and alloys class), with formula written as Ag1-xSbx, where x = 0.09–0.16. This moderately rare mineral is found in silver ores and is therefore named from the Greek άλλος ("allos", another) and the Latin 'argentum' (silver). Its Vickers hardness is 172–203.[1]
[edit] References
- ^ a b Allargentum. Mindat
- ^ Allargentum. Webmineral
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