WGNHS
Wisconsin Geological and Natural History Survey

Sicklerite

Reddish coating, suspected to be sicklerite, on cleavable lithiophyllite. From the Fillow Quarry, Branchville, Redding, Connecticut. Field of view is 60 mm. (Photo courtesy Harold Moritz; unauthorized reproduction is prohibited.)

Formula: Li(Mn,Fe)PO4 Orthorhombic

Description:

Sicklerite is a rare yellowish to dark brown phosphate formed as a result of the alteration of other phosphate minerals in granite pegmatites.

FLORENCE COUNTY: Sicklerite has been tentatively identified as a coating on lithiophyllite in a zoned pegmatite in the NE SE SW sec. 22 T.39N. R.17E. (Koehler, 1989, personal communication).