Bracewellite
Bracewellite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula CrO(OH).
It crystallizes in the orthorhombic crystal system (space group Pbnm). It is a member of the Diaspore structural group.
Key properties: specific gravity 4.45–4.48; Dark brown streak.
IMA symbol Bwe, IMA status: approved, named in 1967.
Found in fine-grained intergrowth with other chromium oxide-hydroxide minerals.
It is found associated with Eskolaite, grimaldiite, guyanaite, mcconnellite.
The name refers to Smith Bracewell, formerly Director, British Guyana Geological Survey, who first noted the occurrence.
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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