Mineral Database (Saesneg yn unig)

Mineral Database (Saesneg yn unig)
Mineralogy of Wales

Mottramite

Crystal System: Orthorhombic
Formula: PbCu(VO4)(OH)
Status of Occurrence: Unconfirmed Occurrence
Distribution: Rare
Chemical Composition: Lead copper zinc vanadate hydroxide
Method(s) of Verification: Flintshire - XRD (Natural History Museum, London, 3008F).
Geological Context:
  • Supergene : in situ natural oxidation & weathering deposits
Introduction: mottramite develops typically as a secondary mineral within the near-surface oxidized zone of lead-copper-vanadium ore deposits.
Occurrence in Wales: a dubious Welsh mineral. Both locality and verification details are vague.
Key Localities:
  • Flintshire: an X-ray investigation by the Natural History Museum, London of a sample from 'Flintshire' was identified as 'mottramite or very near' (Bevins, 1994).
References:
  • Bevins, R.E., 1994 A Mineralogy of Wales  National Museum of Wales, Geological Series No. 16, Cardiff, 146pp.