POLYHALITE


Meaning of POLYHALITE in English

General Information:

Chemical Formula:

K2Ca2Mg(SO4)4·2(H2O)

Composition:

(Molecular Weight = 602.94 gm)

Potassium 12.97 % K

Calcium 13.29 % Ca

Magnesium 4.03 % Mg

Hydrogen 0.67 % H

Sulfur 21.27 % S

Oxygen 47.76 % O

Empirical Formula:

K2Ca2Mg(SO4)4·2(H2O)

Environment:

Sedimentary marine evaporite deposits.

Locality:

Potash beds near Carlsbad, New Mexico.

Name Origin:

From the Greek, polys, meaning "much" and hals, meaning "salt." in allusion to the many salt components in the formulae..

Physical Properties:

Cleavage:

[101] Perfect

Color:

colorless, gray, gray white, white, or pink.

Density:

2.77 - 2.78, Average = 2.77

Diaphaniety:

Transparent to Translucent

Habits:

Massive - Lamellar - Distinctly foliated fine-grained forms., Massive - Fibrous - Distinctly fibrous fine-grained forms.,

Hardness:

2.5-3.5 - Finger Nail-Copper Penny

Luster:

Vitreous (Glassy)

Streak:

white

More details...

Mineralogy database English vocab.      Английский словарь базы данных минералогии .