STILBITE


Meaning of STILBITE in English

General Information:

Chemical Formula:

NaCa4[Al8Si28O72·n(H2O) (n=28-32)

Composition:

(Molecular Weight = 2,877.96 gm)

Sodium 0.80 % Na

Calcium 5.57 % Ca

Aluminum 7.50 % Al

Silicon 27.32 % Si

Hydrogen 2.10 % H

Oxygen 56.70 % O

Empirical Formula:

NaCa4Al8Si28O72·30(H2O)

Environment:

Amygdaloidal cavities in basalts and similer rocks.

Locality:

Trentino, Italy.

Name Origin:

From the Greek stilbe - "luster" in allusion to the pearly to vitreous luster.

Physical Properties:

Cleavage:

[010] Perfect

Color:

white, red, yellow, brown, or cream.

Density:

2.1 - 2.2, Average = 2.15

Diaphaniety:

Transparent to Subtransparent to translucent

Habits:

Wheat Sheaf - Bundle shaped aggregates resembling wheat sheafs after hand reaping wheat., Fibrous - Crystals made up of fibers., Globular - Spherical, or nearly so, rounded forms (e.g . wavellite).

Hardness:

3.5-4 - Copper Penny-Flourite

Luminescence:

None.

Luster:

Vitreous - Pearly

Streak:

white

More details...

Mineralogy database English vocab.      Английский словарь базы данных минералогии .