The open encyclopedia of minerals
GlossaryCite the database
Mineralogist.org
Minerals A–ZSearchCollectionsBrowse by PropertyIdentify a SpecimenCompare MineralsLocalities MapGlossaryContribute Search the Database →
Phosphate

Whiteite-(CaMnMn)

CaMn²⁺Mn²⁺₂Al₂(PO₄)₄(OH)₂·8H₂O
Hardness3.5
Crystal systemMonoclinic
ClassPhosphate
←PrevWhiteite-(CaMnMg)NextWhiteite-(MnFeMg)→

Whiteite-(CaMnMn)

Whiteite-(CaMnMn) is an IMA-recognized mineral species in the phosphate class, with the chemical formula CaMn²⁺Mn²⁺₂Al₂(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 2.7; White streak; Vitreous luster; optically biaxial.

IMA symbol Wt-CaMnMn, IMA status: approved, named in 2011.

Found as a secondary mineral in cavities within zwieselite crystals or as coronas (up to 1 mm in diameter) around cubic crystals of uraninite in the core zone of a complex granitic pegmatite that was altered and leached by low-temperature o.

It is found associated with Triplite-zwieselite, fluorapatite, nordgauite, columbite-(Fe), a Mn-analogue of montgomeryite, koninckite, jahnsite-(CaMnMn).

The name refers to the chemical composition, in accordance with nomenclature for the whiteite group.

Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet. Browse more W minerals or help write this entry.