Graftonite

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Graftonite
Graftonite with Triphylite Iron manganese calcium phosphate Palermo Mine, North Groton, New Hampshire 2863.jpg
Graftonite with Triphylite Iron manganese calcium phosphate Palermo Mine, North Groton, New Hampshire
General
Category Phosphate minerals
Formula
(repeating unit)
(Fe2+,Mn,Ca)3(PO4)2
Strunz classification 08.AB.20

Graftonite is an iron(II), manganese, calcium phosphate mineral with formula: (Fe2+,Mn,Ca)3(PO4)2. It forms lamellar to granular translucent brown to red-brown to pink monoclinic prismatic crystals. It has a vitreous luster with a Mohs hardness of 5 and a specific gravity of 3.67 to 3.7.

It was first described from its type locality of Melvin Mountain in the town of Grafton, in Grafton County, New Hampshire.

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