Attakolite

attakolite

berlinite

trolleite

svanbergite

Images

Formula: CaMn2+Al4(HSiO4)(PO4)3(OH)4
Compound phosphate, manganese-bearing mineral
Crystal System: Monoclinic
Specific gravity: 3.09 to 3.23 measured, 3.35 calculated
Hardness: 5
Colour: Pale red
Common impurities: Pb,Mg,Na,F,Cl,S
Environments

Metamorphic environments

The resemblances beiween X-ray diffraction patterns of bertossaite and of attakolite indicate that their structures are similar although the two minerals are not isostructural (CM 8.668).

Localities

At the type locality, the Västanå Iron mine, Näsum, Bromölla, Skåne County, Sweden, attakolite occurs in an iron deposit of hematite in quartzite. Associated minerals include berlinite, lazulite, trolleite, apatite, svanbergite, pyrophyllite, hematite, calcite and quartz (HOM).

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