Meaning of ALLANITE-(Y) in English

ALLANITE-(Y)

General Information:

Chemical Formula:

(Y,Ce,Ca)2(Al,Fe+++)3(SiO4)3(OH)

Composition:

(Molecular Weight = 598.63 gm)

Calcium 2.01 % Ca

Cerium 14.04 % Ce

Yttrium 17.82 % Y

Aluminum 10.14 % Al

Iron 7.00 % Fe

Silicon 14.07 % Si

Hydrogen 0.17 % H

Oxygen 34.74 % O

Empirical Formula:

Y1.2Ce0.6Ca0.3Al2.25Fe3+0.75(SiO4)3(OH)

IMA Status:

Approved IMA 1987

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 .