ILVAITE


Meaning of ILVAITE in English

General Information:

Chemical Formula:

CaFe++2Fe+++Si2O7O(OH)

Composition:

(Molecular Weight = 408.79 gm)

Calcium 9.80 % Ca

Iron 40.98 % Fe

Silicon 13.74 % Si

Hydrogen 0.25 % H

Oxygen 35.22 % O

Empirical Formula:

CaFe2+3(SiO4)2(OH)

Environment:

Occurs with magnetite ore bodies, with zinc and copper ores, and in contact deposits and zeolites.

Locality:

Capo Calamita, on Elba.

Name Origin:

Named ilvaite from the Latin name of the island of Elba.

Physical Properties:

Cleavage:

[010] Distinct, [001] Distinct

Color:

iron black or dark grayish black.

Density:

3.99 - 4.05, Average = 4.01

Diaphaniety:

Opaque

Habits:

Striated - Parallel lines on crystal surface or cleavage face., Columnar - Forms columns, Massive - Uniformly indistinguishable crystals forming large masses.

Hardness:

5.5-6 - Knife Blade-Orthoclase

Luminescence:

None.

Luster:

Sub Metallic

Streak:

brownish black

More details...

Mineralogy database English vocab.      Английский словарь базы данных минералогии .