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Ludlamite

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Category  Phosphate mineral
Strunz classification  8.CD.20
Space group  P21/a
Formula (repeating unit)  (Fe,Mn,Mg)3(PO4)2·4H2O
Crystal system  Monoclinic
Ludlamite
Crystal class  Prismatic (2/m) (same H-M symbol)

Ludlamite is a rare phosphate mineral with formula: (Fe,Mn,Mg)3(PO4)2·4H2O.

It was first described in 1877 for an occurrence in Wheal Jane mine in Cornwall, England and named for English mineralogist Henry Ludlam (1824–1880).

Occurrence

It occurs in granite pegmatites and as a hydrothermal alteration product of earlier phosphate bearing minerals in a reducing environment. It occurs associated with whitlockite, vivianite, triploidite, triplite, triphylite, siderite, phosphoferrite, fairfieldite and apatite.

References

Ludlamite Wikipedia


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