Specific gravity: 2.877
Solubility: Readily soluble in water
Metamunirite may form by dehydration of munirite (Mindat). It
is extremely rare, and occurs in cavities in vanadium-bearing
sandstone. Associated minerals include
pascoite and clay minerals.
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).
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