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Formula: (Nd,Ln,Ca)(Ti,Nb)2(O,OH)6
Multiple oxide, aeschynite group,
neodymium-, lanthanide-, titanium-
and niobium- bearing mineral
Crystal System: Orthorhombic
Specific gravity: 4.6 to 5.04 measured
Hardness: 5 to 6
Streak: Light yellowish brown
Colour: Dark to pale brown, brownish black
Environments
Plutonic igneous environments
Pegmatites
Carbonatites
Placer deposits
Metamorphic environments
Localities
At the type locality, the East Mine, Bayan Obo deposit, Baotou League, Inner Mongolia, China, aeschynite-(Nd)
occurs in veins in slate and metamorphosed
dolostone associated with aegirine,
riebeckite, baryte,
fluorite, albite,
phlogopite and magnetite
(HOM, Mindat, AM 69.565).
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