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Formula: Mn2+7(SiO4)3(OH)2
Nesosilicate (insular SiO4 groups),
leucophoenicite subgroup,
humite group,
manganese-bearing
mineral
Crystal System: Monoclinic
Specific gravity: 3.848 measured 4.01 calculated
Hardness: 5½ to 6
Streak: Very pale pink to white
Colour: Pink, violet-red, brownish-red to brown
Common impurities: Fe,Mg,Zn,Ca,Na,K,H2O
Environments:
Metamorphic environments
Hydrothermal environments
Localities
At Franklin, New Jersey, leucophoenicite is a late-stage hydrothermal or
contact zone mineral in veins and
skarn in a
metamorphosed stratiform zinc-manganese
orebody
(AM55.1146), associated with willemite,
franklinite, calcite,
vesuvianite, garnet,
sussexite, rhodochrosite,
pyrochroite, tephroite,
sonolite, jerrygibbsite,
glaucochroite,
manganosite, copper, and
zincite
(HOM).
At the Kombatmine, Namibia, leucophoenicite is associated with
barysilite,
spessartine,
vesuvianite,
baryte, copper and
hausmannite
(HOM).
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