GOETHITE


Meaning of GOETHITE in English

General Information:

Chemical Formula:

Fe+++O(OH)

Composition:

(Molecular Weight = 88.85 gm)

Iron 62.85 % Fe

Hydrogen 1.13 % H

Oxygen 36.01 % O

Empirical Formula:

Fe3+O(OH)

Environment:

Common in iron ore deposits.

Locality:

Mesabi district, Minnesota, USA.

Name Origin:

Named after the German poet, J. W. Goethe (1749-1832).

Physical Properties:

Cleavage:

[010] Perfect, [100] Distinct

Color:

brown, reddish brown, yellowish brown, brownish yellow, or ocher yellow.

Density:

3.3 - 4.3, Average = 3.8

Diaphaniety:

Subtranslucent to opaque

Habits:

Acicular - Occurs as needle-like crystals., Reniform - "Kidney like" in shape (e.g.. hematite)., Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite )

Hardness:

5-5.5 - Apatite-Knife Blade

Luminescence:

None.

Luster:

Adamantine - Silky

Streak:

yellowish brown

More details...

Mineralogy database English vocab.      Английский словарь базы данных минералогии .