Mineral Database
Xanthoconite
Crystal System: Monoclinic
Formula: Ag3AsS3
Status of Occurrence: Confirmed Occurrence - 2nd UK recording
Distribution: Rare
Chemical Composition: Silver arsenic sulphide
Method(s) of Verification: Dolyhir Quarry - XRD (Manchester Museum).
Xanthoconite from Dolyhir Quarry. Neil Hubbard Collection. Photo D.I. Green, © D.I. Green.
Chemical Group:
- Sulphosalts
Geological Context:
- Hydrothermal
Introduction: a rare silver-bearing mineral found with other silver sulfosalts in hydrothermal veins.
Occurrence in Wales: xanthoconite has recently been identified as rare microcrystals at Dolyhir Quarry in the Welsh borderland (D.I. Green, unpublished data). A full description of the mineralogy of this quarry is in preparation.
Key Localities:
- Dolyhir Quarry, Old Radnor, Powys: recently identified as microcrystals on a specimen collected by Neil Hubbard.
References:
There are no references for this specimen.
