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Aeschynite-(Nd)

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Aeschynite-(Nd)
Aeschynite-(Nd) is a rare earth mineral of neodymiumceriumcalciumthoriumtitaniumniobiumoxygen, and hydrogen with formula: (Nd,Ce,Ca,Th)(Ti,Nb)2(O,OH)6. Its name comes from the Greek word for "shame". Its Mohs scale rating is 5 to 6.

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Mineralogy Database Dictionary

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Aeschynite-(Nd)

General Information:
 Chemical Formula:
(Nd,Ce)(Ti,Nb)2(O,OH)6
 Composition:
(Molecular Weight = 346.61 gm)
Cerium 16.17 % Ce
Titanium 24.17 % Ti
Niobium 6.70 % Nb
Hydrogen 0.29 % 
Neodymium 24.97 % Nd
Oxygen 27.70 % 
 Empirical Formula:
Nd0.6Ce0.4Ti1.75Nb0.25O5(OH)
 IMA Status:
Approved IMA 1983
 Locality:
TL: China, Inner Mongolia, Bayan Obo
 Name Origin:
Named for its composition and from the Greek for "shame," in allusion to the inability of chemists, at the time of its discovery, to separate some of its constituents.
Physical Properties:
 Cleavage:
None
 Color:
brown.
 Density:
4.6 - 5.04, Average = 4.82
 Diaphaniety:
Subtranslucent
 Habits:
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite), Metamict - Mineral originally crystalline, now amorphous due to radiation damage.,
 Hardness:
5-6 - Between Apatite and Orthoclase
 Luster:
Adamantine
 Streak:
brown
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