PECTOLITE


Meaning of PECTOLITE in English

General Information:

Chemical Formula:

NaCa2Si3O8(OH)

Composition:

(Molecular Weight = 332.40 gm)

Sodium 6.92 % Na

Calcium 24.11 % Ca

Silicon 25.35 % Si

Hydrogen 0.30 % H

Oxygen 43.32 % O

Empirical Formula:

NaCa2(Si3O8)(OH)

Environment:

Secondary mineral in basaltic rocks.

Locality:

Prospect Park quarry, northern New Jersey.

Name Origin:

From the Greek pektos - "compacted" and lithos - "stone."

Physical Properties:

Cleavage:

[001] Perfect, [100] Perfect

Color:

white, gray, light pink, or light green.

Density:

2.86

Diaphaniety:

Subtranslucent to translucent to opaque

Habits:

Acicular - Occurs as needle-like crystals., Globular - Spherical, or nearly so, rounded forms (e.g. wavellite)., Radial - Crystals radiate from a center without producing stellar form s (e.g. stibnite)

Hardness:

5 - Apatite

Luminescence:

None.

Luster:

Vitreous - Silky

Streak:

white

More details...

Mineralogy database English vocab.      Английский словарь базы данных минералогии .