PERRAULTITE


Meaning of PERRAULTITE in English

General Information:

Chemical Formula:

Na2KBaMn++8(Ti,Nb)4Si8O32(OH,F,(H2O))7

Composition:

(Molecular Weight = 1,759.06 gm)

Potassium 2.22 % K

Barium 7.81 % Ba

Sodium 2.61 % Na

Titanium 8.17 % Ti

Manganese 24.99 % Mn

Niobium 5.28 % Nb

Silicon 12.77 % Si

Hydrogen 0.32 % H

Oxygen 33.56 % O

Fluorine 2.27 % F

Empirical Formula:

Na2KBaMn2+8Ti3NbSi8O32(OH)4.2F2.1(H2O)0.7

IMA Status:

Approved IMA

Physical Properties:

Cleavage:

[001] Perfect

Color:

orange brown.

Density:

3.71

Diaphaniety:

Transparent to Translucent

Hardness:

4 - Fluorite

Luster:

Vitreous (Glassy)

Streak:

light brown

More details...

Mineralogy database English vocab.      Английский словарь базы данных минералогии .