Bamfordite
Bamfordite is an IMA-recognized mineral species in the molybdate class, with the chemical formula Fe³⁺Mo₂O₆(OH)₃·H₂O.
It crystallizes in the triclinic crystal system (space group P-1).
Key properties: Mohs hardness 2–3; specific gravity 3.62; Greenish yellow streak; Vitreous, earthy in aggregates luster; optically biaxial.
IMA symbol Bfd, IMA status: approved, named in 1996.
Formed in miarolitic cavities and vugs by oxidation of molybdenite under strongly acidic conditions in a W–Mo–Bi deposit.
It is found associated with W–Mo–Bi oxides, “clay”, muscovite, quartz.
The name refers to its occurrence on Bamford Hill, Australia.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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