Graftonite
(Fe2+,Mn,Ca)3(PO4)2Strunz classification 8.AB.20 Crystal system Monoclinic Crystal class Prismatic (2/m)
(same H-M symbol) Space group P21/c Borates Carbonates Oxides
Phosphates Silicates Sulfides Other 
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(same H-M symbol)
Graftonite is an iron(II), manganese, calcium phosphate mineral with the chemical 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.
References
- Mindat with location data
- Webmineral data
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Manganese minerals
- Sussexite
- Tusionite
| Simple | |
|---|---|
| Mixed |
- Axinite (borosilicate)
- Geigerite (arsenate)
- Manganese nodule (various)
- Samsonite (sulfosalt)
- Zincobotryogen (sulfate)
- Wolframite (tungstate)
- Hübnerite (tungstate)
Minerals portal | This article about a specific phosphate mineral is a stub. You can help Wikipedia by expanding it. |
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