BOKITE


Meaning of BOKITE in English

General Information:

Chemical Formula:

(Al,Fe+++)1.3(V++++,Fe)8O20·4.7(H2O)

Composition:

(Molecular Weight = 858.38 gm)

Aluminum 3.14 % Al

Vanadium 44.51 % V

Iron 5.20 % Fe

Hydrogen 1.10 % H

Oxygen 46.04 % O

Empirical Formula:

AlFe3+0.3V4+7.5Fe3+0.5O204.7(H2O)

IMA Status:

Approved IMA 1963

Locality:

Kurumsak area, Kazakhstan.

Name Origin:

Named for Ivan I. Bok, (1898-), Kazakh mineralogist.

Physical Properties:

Cleavage:

[???] Perfect

Color:

black.

Density:

2.97 - 3.1, Average = 3.03

Diaphaniety:

Opaque

Habits:

Reniform - "Kidney like" in shape (e.g.. hematite)., Encrustations - Forms crust-like aggregates on matrix., Radial - Crystals radiate from a center without producing stellar forms (e .g. stibnite)

Hardness:

3 - Calcite

Luster:

Metallic - Dull

Streak:

brownish black

More details...

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