Reevesite

reevesite

violarite

millerite

maghemite

Images

Formula: Ni₆Fe³⁺₂(CO₃)(OH)₁₆.4H₂O
Hydrated carbonate containing hydroxyl, hydrotalcite group, hydrotalcite supergroup
Crystal System: Trigonal
Specific gravity: 2.80 to 2.88 measured, 2.83 calculated
Hardness: 2
Colour: Yellow to yellow-green
Environments

Meteorites

Localities

At the type locality, the Wolfe Creek meteorite crater, Carranya Station, Halls Creek Shire, Western Australia, reevesite occurs as an alteration product of the highly weathered iron-nickel meteorite, forming yellow fine-grained aggregates lining cavities and cracks. Associated minerals include goethite, nickel-bearing maghemite, jarosite, nickel-bearing serpentine, apatite and lipscombite (AM 52.1190-1197, HOM).

At the Bon Accord Nickel deposit, Barberton, Ehlanzeni District, Mpumalanga, South Africa, reevesite occurs as an alteration product of violarite in nickel ore at a contact between quartzite and ultramafic rocks. Associated minerals include violarite, millerite, ferroan trevorite, willemseite, nimite, opal and quartz (AM 56.1077-1081, HOM, Dana).

At Hagdale Quarry, Unst, Shetland, Scotland, UK, reevesite occurs on chromatite associated with honessite, hydrohonessite and theophrastite (HOM).

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