Allargentum

Allargentum
Allargentum on carbonate; size 3.2×2.7×1.4 cm
General
CategorySulfide mineral
Formula
(repeating unit)		Ag1−xSbx
IMA symbolAll[1]
Strunz classification2.AA.30
Dana classification02.02.01.02
Crystal systemHexagonal
Crystal classDihexagonal dipyramidal (6/mmm)
H-M symbol: (6/m 2/m 2/m)
Space groupP63/mmc
Unit cella = 2.945, c = 4.77 [Å], Z = 2
Identification
ColorSilver gray
Mohs scale hardness4
LusterMetallic
DiaphaneityOpaque
Specific gravity10.0 (meas.), 10.12 (calc.)
References[2][3]

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.[2]

References

  1. ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
  2. ^ a b Allargentum. Mindat
  3. ^ Allargentum. Webmineral


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