graftonite
{{Distinguish|Gratonite}}
{{Infobox mineral
| name = Graftonite
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| image = Graftonite with Triphylite Iron manganese calcium phosphate Palermo Mine, North Groton, New Hampshire 2863.jpg
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| caption = Graftonite with Triphylite Iron manganese calcium phosphate Palermo Mine, North Groton, New Hampshire
| category = Phosphate minerals
| formula = {{chem2|(Fe^{2+},Mn,Ca)3(PO4)2}}
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| strunz = 8.AB.20
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| system = Monoclinic
| class = Prismatic (2/m)
(same H-M symbol)
| symmetry = P21/c
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Graftonite is an iron(II), manganese, calcium phosphate mineral with the chemical formula {{chem2|(Fe^{2+},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
- [http://www.mindat.org/min-1735.html Mindat with location data]
- [http://www.webmineral.com/data/Graftonite.shtml Webmineral data]
{{Manganese minerals}}
Category:Manganese(II) minerals
Category:Minerals in space group 14
{{phosphate-mineral-stub}}