Planerite

planerite

wavellite

quartz

turquoise

Images

Formula: Al₆(PO₄)₂(PO₃OH)₂(OH)₈.4H₂O
Valence: Al³⁺₆(PO₄)^3-₂(PO₃OH)^2-₂(OH)^1-₈.4H₂O
Hydrated phosphate, turquoise group, forms a series with turquoise
Crystal system: Triclinic
Specific gravity: 2.68 measured, 2.71 calculated
Hardness: 5
Streak: Greenish white, white
Colour: White, pale green, pale blue
Solubility: The powder is only slightly affected by acid. Easily decomposed in boiling NaOH
Environments

Sedimentary environments

Planerite is a rare secondary mineral formed in phosphate-rich aluminous deposits (HOM).

Localities

At the type locality, Chernovskaya Mt, Chernaya River, Verkhnyaya Pyshma, Sverdlovsk Oblast, Russia, planerite occurs as coatings on quartz in fractures of the rock in the copper deposit (Mindat).
Planerite from Chernovskaya Mt - Image

At Mauldin Mountain, Montgomery County, Arkansas, USA, planerite has been found with wavellite (Mindat photo).
Planerite from Mauldin Mountain - Image

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