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Ferrowyllieite
Type Locality
Victory Mine (Victory pegmatite; Victory Mica Mine; Hedman Mine), Custer, Custer District, Custer Co., South Dakota, USA
Mineral Data
(Na,Ca,Mn)(Fe,Mn)(Fe,Fe,Mg)Al(PO
4
)
3
Strunz:
8.AC.15
Physical Properties
Hardness:
4.0
Tenacity:
brittle
