Meaning of AEGIRINE-AUGITE in English

AEGIRINE-AUGITE

General Information:

Chemical Formula:

(Ca,Na)(Mg,Fe++,Fe+++)[Si2O6]

Composition:

(Molecular Weight = 228.05 gm)

Sodium 2.52 % Na

Calcium 13.18 % Ca

Magnesium 5.33 % Mg

Iron 12.24 % Fe

Silicon 24.63 % Si

Oxygen 42.09 % O

Empirical Formula:

Ca0.75Na0.25Mg0.5Fe2+0.25Fe3+0.25(Si2O6)

Environment:

Characteristic mineral of alkaline rocks, particularly syenites and iron-rich metamorphic and metasomatic rocks.

IMA Status:

Not IMA Approved

Locality:

Common world-wide.

Name Origin:

Name derived from its intermediate pyroxene composition. This is not an end-member species.

Physical Properties:

Cleavage:

[110] Very Good, [100] Parting

Color:

dark green, black, green, pale greenish yellow, or greenish gray.

Density:

3.4 - 3.6, Average = 3.5

Diaphaniety:

Translucent to opaque

Habits:

Fibrous - Crystals made up of fibers., Anhedral Grains - Granular minerals without the expression of crystal shapes, Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

6 - Orthoclase

Luster:

Vitreous (Glassy)

More details...

Mineralogy database English vocab.      Английский словарь базы данных минералогии .