Images
Formula: NdCu2+6(AsO4)3(OH)6.3H2O
Arsenate, mixite group,
neodymium-bearing mineral
Crystal System: Hexagonal
Specific gravity: 3.81 calculated
Hardness: 3 to 4
Streak: White, greenish white
Colour: Grass-green, greenish, greenish blue
Luminescence: Not fluorescent under UV
Mildly RADIOACTIVE
Environments
Metamorphic environments
Hydrothermal environments
Localities
At the type locality, the Hilarion mine, Kamariza Mines, Agios Konstantinos, Lavrion Mining District, Lavreotiki,
East Attica, Attica, Greece, agardite-(Nd) occurs in cavities of an oxidised ore, primarily
goethite, and in cracks of
supergene altered mica
schist. The agardite-(Nd) forms acicular crystals with
hexagonal cross sections, to 0.5 mm, in divergent sprays to 2 mm, typically as rims on
zálesíite. Associated minerals include
agardite-(Y), agardite-(La),
zálesíite, zincolivenite,
azurite, malachite,
calcite and goethite
(HOM, Mindat).
Agardite-(Nd) from the Hilarion Mine -
Image
At the Big 3 Mine, Railroad Springs Mining District, Esmeralda County, Nevada, USA, Aqua-blue sprays of
agardite-(Nd) have been found with gemmy green spheres of
conichalcite perched upon them
(Mindat photo).
Agardite-(Nd) from the Big 3 Mine - Image
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