Hydroxylclinohumite
Hydroxylclinohumite is an IMA-recognized mineral species in the silicate class, with the chemical formula Mg₉(SiO₄)₄(OH)₂.
It crystallizes in the monoclinic crystal system (space group P2_1/b). It is a member of the Humite structural group.
Key properties: Mohs hardness 6.5; specific gravity 3.13; White streak; Vitreous to dull luster; optically biaxial.
IMA symbol Hchu, IMA status: approved, named in 1998.
Found in Mg-skarn (calciphyric) rims on dolomitic marble xenoliths in gabbroic rocks and associated Fe-Ti ore.
It is found associated with Ferroan spinel, calcite.
Indicates the hydroxyl-dominant analogue of clinohumite.
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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