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Formula: NdVO4
Valence: NdV5+O4
Simple vanadate of neodymium,
xenotime group
Crystal system: Tetragonal
Specific gravity: 4.782 calculated
Colour: Colourless or slightly reddish pink in thin section
Environments
Metamorphic environments
Hydrothermal environments
Localities
At the type locality, the Arase mine, Kami city, Kochi Prefecture, Japan, wakefieldite-(Nd) occurs as grains
in caryopilite, not exceeding 20 µm in size, formed from metamorphism-induced recrystallisation and dehydration of
Fe- and Mn- oxyhydroxide in the stratiform ferromanganese deposit. Associated minerals include
hematite, caryopilite,
calcite and rhodochrosite
(Mindat, HOM).
Wakefieldite-(Nd) from the Arase Mine -
Image
At Mount Belknap, Piute County, Utah, USA, the high-silica rhyolitic Joe Lott Tuff was erupted at about 19 million
years ago from the caldera. Certain units in the tuff contain two
species of wakefieldite, the Nd- and Y- dominant types. They occur in disseminated streaks and patches in
association with rhodochrosite,
calcite, Fe oxide,
cerite-(CeCa),
and a Mn silicate (caryopilite?), thought to have been deposited from
hydrothermal fluids
(MM 84.1.109-116).
Other associated minerals include monazite,
magnetite, ilmenite and
quartz
(HOM).
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