Carnallite

A mineral of potassium magnesium chloride

Properties

Material Characteristics

It is variably colored yellow to white, reddish, and sometimes colorless or blue. It can be massive to fibrous with some rare cases of fine crystals.  

Physical & Chemical Properties

Absorbs moisture from the surrounding air, and must be stored in an airtight container. When heated dry it will fizzle and crack.

History & Usage

Everyday use

Carnallite is mostly used in fertilizers. It is an important source of soluble potassium salts, and is a minor source of magnesium.
Type
Ore/Mineral