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Vanadate

Rusakovite

(Fe,Al)₅(VO₄)₂(OH)₉·3H₂O
Hardness1.5–2
ClassVanadate
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Rusakovite specimen

Rusakovite Locality: Gold Quarry Mine (Maggie claims), Maggie Creek District, Eureka County , Nevada , USA ( Locality at mindat.org ) Analysed tiny yellowish brown crystals of Rusakovite. Field of view 2 mm. Specimen and photo Leon Hupperichs. — Photo: Leon Hupperichs · CC BY-SA 3.0

Rusakovite

Rusakovite is an IMA-recognized mineral species in the vanadate class, with the chemical formula (Fe,Al)₅(VO₄)₂(OH)₉·3H₂O.

Key properties: Mohs hardness 1.5–2; specific gravity 2.73–2.8; Ocher-yellow streak; Dull luster.

IMA symbol Rko, IMA status: approved, named in 1960.

Found in the oxidized zone of a vanadium-rich carbonaceous shale.

It is found associated with Apatite, collophane, ferric allophane, vanadian mica, iron hydroxides, sulfides of Cu, Zn, Pb, V.

The mineral was named to honor Mikhail Petrovich Rusakov (1892–1963), Kazakh geologist, Institute of Geosciences, Alma-Ata, Kazakhstan.

Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet. Browse more R minerals or help write this entry.