Image: Andrew Silver (Public domain)
orthorhombicuncommonPhosphates
Wavellite
Al₃(PO₄)₂(OH,F)₃·5H₂O
This specimen displays characteristic radiating spherical aggregates of wavellite, forming botryoidal crusts with a distinct light green to yellowish-green color.
Wavellite Physical Properties
Mohs Hardness
3.5Crystal System
orthorhombicLuster
vitreousStreak Color
whiteCleavage
good on {110}, poor on {010} and {100}Fracture
unevenSpecific Gravity
2.3Colors
green, yellow, white, blue, brownTransparency
translucentType Locality
Montgomery County, ArkansasMineral Group
PhosphatesUses
collectorAssociated Minerals
limonite, variscite, crandalliteRarity
uncommonGeological Context
Wavellite is a secondary mineral typically found in fissures and joints of low-grade metamorphic aluminous rocks, phosphate-rich sedimentary rocks, or limonite deposits, forming from the alteration of other aluminum-bearing minerals.
