Clinometaborite
Clinometaborite is an IMA-recognized mineral species in the borate class, with the chemical formula HBO₂.
It crystallizes in the monoclinic crystal system (space group P2_1/c).
Key properties: specific gravity 2.049; Vitreous luster; optically biaxial.
IMA symbol Cmbo, IMA status: approved, named in 2010.
Found as a sublimate in an active fumarole (~250 flC) in a volcanic crater.
It is found associated with Metaborite, sassolite, adranosite.
The name refers to its monoclinic symmetry and compositional identity with metaborite.
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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