Aeschynite-(Nd)

minerals

aegirine

riebeckite

phlogopite

Images
Formulae: (Nd,Ln,Ca)(Ti,Nb)2(O,OH)6
Multiple oxide containing niobium or titanium, aeschynite group
Specific gravity: 4.6 to 5.04
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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