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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
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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