Meaning of ALUNITE in English

ALUNITE

General Information:

Chemical Formula:

KAl3(SO4)2(OH)6

Composition:

(Molecular Weight = 414.21 gm)

Potassium 9.44 % K

Aluminum 19.54 % Al

Hydrogen 1.46 % H

Sulfur 15.48 % S

Oxygen 54.08 % O

Empirical Formula:

KAl3(SO4)2(OH)6

Environment:

Rock forming mineral where acid, often ore-bearing, solutions have altered orthoclase feldspar-rich rocks.

IMA Status:

Approved IMA 1963

Locality:

Marysvale, Utah.

Name Origin:

From the Latin alunit, meaning "alum."

Physical Properties:

Cleavage:

[0001] Good

Color:

white, gray, yellowish gray, reddish gray, or yellowish white.

Density:

2.59 - 2.9, Average = 2.74

Diaphaniety:

Transparent to translucent

Habits:

Massive - Granular - Common texture observed in granite and other igneous rock., Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite)., Fibrous - Cr ystals made up of fibers.

Hardness:

3.5-4 - Copper Penny-Flourite

Luminescence:

None.

Luster:

Vitreous - Pearly

Streak:

white

More details...

Mineralogy database English vocab.      Английский словарь базы данных минералогии .