PYROPHYLLITE


Meaning of PYROPHYLLITE in English

General Information:

Chemical Formula:

Al2Si4O10(OH)2

Composition:

(Molecular Weight = 360.31 gm)

Aluminum 14.98 % Al

Silicon 31.18 % Si

Hydrogen 0.56 % H

Oxygen 53.28 % O

Empirical Formula:

Al2Si4O10(OH)2

IMA Status:

Approved IMA

Locality:

Pyschminsk and Beresovsk, Ural Mountains, Russia.

Physical Properties:

Cleavage:

[001] Perfect

Color:

brown green, brownish yellow, greenish, gray green, or gray white.

Density:

2.8 - 2.9, Average = 2.84

Diaphaniety:

Translucent to opaque

Habits:

Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite)., ,

Hardness:

1.5-2 - Talc-Gypsum

Luminescence:

Fluorescent.

Luster:

Pearly

Streak:

white

More details...

Mineralogy database English vocab.      Английский словарь базы данных минералогии .