Chernovite-(Y)

chernovite-(Y)

piemontite

scheelite

hastingsite

Images

Formula: Y(AsO4)
Anhydrous normal arsenate, xenotime group, forms a series with xenotime-(Y)
Specific gravity: 4.866
Hardness: 4 to 5
Streak: White
Colour: Brown, colourless, light yellow
Mildly RADIOACTIVE
Environments

Igneous environments
Pegmatites
Hydrothermal environments

Typically chernovite-(Y) occurs in altered rhyolite, in pegmatites, or within Alpine-type veins (MW).

Localities

At Binn, Goms, Valais, Switzerland, chernovite-(Y) occurs in Alpine-type fissures associated with niobium-bearing rutile, magnetite, asbecasite and cafarsite (HOM).

At the type locality, the Nyarta-Syu-Yu River, Tel'pos-Iz Mt, Tyumen Oblast, Russia, chernovite-(Y) occurs in piemontite veinlets in rhyolite porphyry. Associated minerals include piemontite, molybdenum-bearing scheelite, albite, calcite, garnet, hastingsite, pyrolusite and hematite (AM 53.1777, HOM).

At the Alexandra Quarry, Gwynedd, Wales, United Kingdom, minute spots of chernovite-(Y) have been found with quartz, calcite, epidote, dravite and synchysite-(Ce) in green reduction spots in lower Cambrian slate (JRS 16.60-63).

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