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ESTA Kieserite
Kieserite has been found in marine deposits of the former Zechstein Sea, as a component of the Hartsalz (hard salt), a mineral mixture consisting of NaCl, KCl and MgSO4 • H2O. However, the German president of the Academy of Jena Prof. Kieser (1779-1862) was the first to describe the unique characteristics of magnesium sulphate with one molecule water of crystallisation (MgSO4 • H2O), which was therefore named after him.
The properties of Kieserite are defined by crystal design, hardness, density and solubility.
These characteristics have been formed under natural conditions prevailing during the formation of German potash and kieserite deposits and are not lost by the purely physical separation process turning kieserite into ESTA Kieserite.
This process is called electrostatic separation (ESTA) and was invented by K+S KALI GmbH.
A variety of hard salts, most commonly found in a greyish colour. |
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The Kieserite crystal:
Crystal: monocline-
prismatic
Hardness: 3.5
Solubility in water (20°C):
417 g l-1
Density: 2.57 g cm-3
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