Meaning of ALLANITE-(LA) in English

ALLANITE-(LA)

General Information:

Chemical Formula:

Ca(La,Ce)(Fe++,Mn++)(Al,Fe+++)2(SiO4)(Si2O7)O(OH)

Composition:

(Molecular Weight = 596.56 gm)

Calcium 6.72 % Ca

Lanthanum 17.46 % La

Cerium 5.87 % Ce

Manganese 2.30 % Mn

Aluminum 6.78 % Al

Iron 11.70 % Fe

Silicon 14.12 % Si

Hydrogen 0.17 % H

Oxygen 34.87 % O

Empirical Formula:

CaLa0.75Ce0.25Fe2+0.75Mn2+0.25Al1.5Fe3+0.5(SiO4)(Si2O7)O(OH)

IMA Status:

Not IMA Approved

Locality:

TL: Russia, Karelia

Name Origin:

Named after the Scottish mineralogist, T. Allan (1777-1833).

Physical Properties:

Cleavage:

[001] Imperfect, [100] Imperfect

Color:

brown or black.

Density:

3.3 - 4.2, Average = 3.75

Diaphaniety:

Translucent to opaque

Habits:

Massive - Granular - Common texture observed in granite and other igneous rock., Disseminated - Occurs in small, distinct particles dispersed in matrix.,

Hardness:

5.5 - Knife Blade

Luminescence:

None.

Luster:

Vitreous - Greasy

Streak:

grayish brown

More details...

Mineralogy database English vocab.      Английский словарь базы данных минералогии .