Crystal System: Tetragonal
Status of Occurrence: Confirmed Occurrence - 1st UK recording
Chemical Composition: Titanium tantalum iron oxide
Chemical Formula: (Ti,Ta,Fe3+)3O6
Method(s) of Verification: Y Llymllwyd, Nant Ffrancon - XRD (D. Jenkins, University College of North Wales, Bangor)
- Niobates and Tantalates
Introduction: strüverite is a rare mineral typically found as a late stage magmatic mineral in granite pegmatites. This mineral name is considered to be somewhat superfluous as strüverite compositions may be considered as tantalian rutile.
Occurrence in Wales: unpublished data provides the first UK occurrence of this mineral.
- Nant Ffrancon, Gwynedd: at Y Llymllwyd, near Nant Ffrancon, small prisms in altered microgranite, associated with brookite and gibbsite from this locality have been identified as strüverite on the basis of X-ray diffraction analysis.
There are no references for this specimen.