Metamunirite

metamunirite

rossite

metarossite

pascoite

Images

Formula: NaV5+O3
Vanadium oxysalt
Specific gravity: 2.877
Hardness: 1
Streak: White
Colour: Colourless
Solubility: Readily soluble in water
Environments

Sedimentary environments

Metamunirite may form by dehydration of munirite (Mindat). It is extremely rare, and occurs in cavities in vanadium-bearing sandstone. Associated minerals include rossite, metarossite, pascoite and clay minerals. (HOM).

Localities

The type locality is the Burro Mine, Slick Rock Mining District, San Miguel County, Colorado, USA. The most common vanadates occurring among efflorescences within weathered vanadium-bearing sandstone, are pascoite, hummerite and huemulite. In more alkaline environments rossite and metarossite are more rarely found. Excellent examples of rossite have been found in the Burro mine, which transform to metarossite through loss of water.
Metamunirite has also been found here as clusters of radiating colourless needles up to 0.2 mm in length in cavities in the sandstone (MM 55.509-513).

Back to Minerals