TSCHERMAKITE


Meaning of TSCHERMAKITE in English

General Information:

Chemical Formula:

[ ]Ca2(Mg3AlFe+++)Si6Al2O22(OH)2

Composition:

(Molecular Weight = 844.38 gm)

Calcium 9.49 % Ca

Magnesium 8.64 % Mg

Aluminum 9.59 % Al

Iron 6.61 % Fe

Silicon 19.96 % Si

Hydrogen 0.24 % H

Oxygen 45.48 % O

Empirical Formula:

Ca2Mg3Al3Fe3+Si6O22(OH)2

IMA Status:

Approved IMA 1978 (Dana # Added)

Name Origin:

Named for Gustav Tschermak von Sessenegg (1836-1927), Austrian mineralogist.

Physical Properties:

Cleavage:

[110] Perfect

Color:

green, dark green, or black.

Density:

3.14 - 3.35, Average = 3.24

Diaphaniety:

Translucent to Subopaque

Hardness:

5-6 - Between Apatite and Orthoclase

Luster:

Vitreous (Glassy)

Streak:

greenish white

More details...

Mineralogy database English vocab.      Английский словарь базы данных минералогии .