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Samuelsonite

Type Locality
Palermo No. 1 Mine (Palermo No. 1 pegmatite; Hartford Mine; GE Mine), Groton, Grafton Co., New Hampshire, USA
Mineral Data
(Ca,Ba)Ca8Fe2+2Mn2+2Al2(PO4)10(OH)2
Strunz: 
8.BF.10
Physical Properties
Hardness: 
5.0