Whiteite-(CaMnMg)
Whiteite-(CaMnMg) is an IMA-recognized mineral species in the phosphate class, with the chemical formula CaMn²⁺Mg₂Al₂(PO₄)₄(OH)₂·8H₂O.
It crystallizes in the monoclinic crystal system (space group P2/a). It is a member of the Jahnsite structural group.
Key properties: Mohs hardness 3.5; specific gravity 2.63; White streak; Dull luster; optically biaxial.
IMA symbol Wt-CaMnMg, IMA status: approved, named in 1986.
Along fracture surfaces in beryl and quartz in a zoned complex granite pegmatite.
It is found associated with Montgomeryite, tiptopite, roscherite, englishite, beryl.
The name refers to its relation to sl whiteite-(CaFeMg); the suffix indicates sequentially the dominant atom in the X, M(1), and M(2) structural positions.
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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