Reddingite

minerals

lithiophilite

eosphorite

rhodochrosite

Formula: Mn2+3(PO4)2.3H2O
Hydrated normal phosphate, phosphoferrite group and forms a series with it
Specific gravity: 3 to 3.2
Hardness: 3½
Streak: White
Colour: Colourless, pale pink or yellow, reddish brown to dark brown (altered); colourless, faintly tinted pink in transmitted light
Solubility: Soluble in acids
Environments

Pegmatites

Reddingite is a rare secondary hydrothermal alteration product in zoned complex granite pegmatites, associated with dickinsonite, triploidite, triplite, lithiophilite, fairfieldite, eosphorite, hureaulite and rhodochrosite (HOM).

At the type locality, the Fillow Quarry, Branchville, Redding, Fairfield County, Connecticut, USA, reddingite is an alteration product of lithiophilite-triphylite (Dana).

At the Emmons pegmatite, Greenwood, Oxford county, Maine, USA, reddingite may be covered by a crust of landesite (R&M 94.6.514).

Common impurities: Fe

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