Mineral Database (Saesneg yn unig)

Mineral Database (Saesneg yn unig)
Mineralogy of Wales

Bixbyite

Crystal System: Cubic
Formula: (Mn3+Fe3+)O3
Status of Occurrence: Confirmed Occurrence - 1st UK recording
Distribution: Rare
Chemical Composition: Manganese iron oxide
Method(s) of Verification: Benallt Mine - XRD at the Natural History Museum, London (X-ray no. x3543).
Chemical Group:
  • Oxides & Hydroxides
Geological Context:
  • Metamorphic
Introduction: a manganese iron oxide mineral found in metamorphosed manganese ore bodies and also within gas cavities in rhyolitic lavas.
Occurrence in Wales: bixbyite has only been identified from one locality in Wales.
Key Localities:
  • Benallt Mine, Llŷn, Gwyneddŷ: bixbyite associated with hausmannite has been confirmed from this locality on the basis of X-ray diffraction.
References:
There are no references for this specimen.