Meaning of AESCHYNITE-(CE) in English

AESCHYNITE-(CE)

General Information:

Chemical Formula:

(Ce,Ca,Fe)(Ti,Nb)2(O,OH)6

Composition:

(Molecular Weight = 305.70 gm)

Calcium 3.93 % Ca

Cerium 27.50 % Ce

Titanium 27.41 % Ti

Niobium 7.60 % Nb

Iron 1.83 % Fe

Hydrogen 0.33 % H

Oxygen 31.40 % O

Empirical Formula:

Ce0.6Ca0.3Fe2+0.1Ti1.75Nb0.25O5(OH)

Environment:

Nepheline syenite rocks.

IMA Status:

Approved IMA 1987

Locality:

TL: Russia, Chelyabinsk, Il'men Mountians.

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, brownish black, yellow, or black.

Density:

5.19

Diaphaniety:

Transparent to translucent

Habits:

Massive - Uniformly indistinguishable crystals forming large masses., Acicular - Occurs as needle-like crystals.,

Hardness:

5-6 - Between Apatite and Orthoclase

Luminescence:

Non-fluorescent.

Luster:

Adamantine - Resinous

Streak:

brownish black

More details...

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