Meaning of ACTINOLITE in English

ACTINOLITE

General Information:

Chemical Formula:

Ca2(Mg,Fe++)5Si8O22(OH)2

Composition:

(Molecular Weight = 875.45 gm)

Calcium 9.16 % Ca

Magnesium 8.33 % Mg

Iron 12.76 % Fe

Silicon 25.66 % Si

Hydrogen 0.23 % H

Oxygen 43.86 % O

Empirical Formula:

Ca2Mg3Si8O22(OH)2Fe2+2

Environment:

Metamorphic rocks.

IMA Status:

Approved IMA 1978

Locality:

Common world wide.

Name Origin:

From the Greek, aktinos, meaning "ray" in allusion to actinolite's fibrous nature.

Physical Properties:

Cleavage:

[110] Perfect, [110] Perfect

Color:

green, green black, gray green, or black.

Density:

2.98 - 3.1, Average = 3.04

Diaphaniety:

Translucent to transparent

Habits:

Bladed - Aggregates of thin lath-like crystals (e.g. kyanite)., Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite), Fibrous - Crystals made up of fibers.

Hardness:

5.5 - Knife Blade

Luminescence:

Non-fluorescent.

Luster:

Vitreous (Glassy)

Streak:

white

More details...

Mineralogy database English vocab.      Английский словарь базы данных минералогии .