Strunz classification 2.AA.30 Crystal system Hexagonal | Formula(repeating unit) Ag1-xSbx Dana classification 02.02.01.02 | |
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Crystal class Dihexagonal dipyramidal (6/mmm)H-M symbol: (6/m 2/m 2/m) | ||
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 ἄλλος (allos, "another") and the Latin argentum ("silver"). Its Vickers hardness is 172–203.
References
Allargentum Wikipedia(Text) CC BY-SA