Parisite-(Nd)

parisite-(Nd)

parisite-(Ce)

aeschynite-(Nd)

bastnasite-(Ce)

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Formula: Ca(Nd,Ce,La)2(CO3)3F2
Carbonate, parisite group, neodymium-, cerium- and lanthanum- bearing mineral
Crystal system: Monoclinic
Specific gravity: 4.357 calculated
Hardness: 4 to 5
Streak: Pale yellow
Colour: Yellowish brown
Environments

Sedimentary environments
Metamorphic environments

Parisite-(Nd) is a new mineral, approved in 2024 and pending publication as of May 2025.

Localities

At the type locality:ⓘ Bayan Obo deposit, Bayan Obo, Bayan Obo mining district, Baotou City, Inner Mongolia, China, parisite-(Nd) occurs as subhedral to anhedral irregular grains, from 0.02 mm to 1 mm in size, in dolomitic marble. Associated minerals include aegirine, aeschynite-(Ce), aeschynite-(Nd), baryte, bastnäsite-(Ce), calcite, fluorite, hematite, magnetite, monazite group minerals, parisite-(Ce) and riebeckite (Mindat).

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