Kainite


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Related to Kainite: langbeinite, Kainate

kainite

[′kī‚nīt]
(mineralogy)
MgSO4·KCl·3H2O A white, gray, pink, or black monoclinic mineral, occurring in irregular granular masses; used as a fertilizer and as a source of potassium and magnesium compounds.

Kainite

 

a mineral of the group of complex sulfates. Its chemical composition is RMg(SO4)Cl.3H2O. It crystallizes in a monoclinic system. It usually forms dense grainy masses; less frequently, tabular or prismatic crystals. The color is yellowish or whitish gray, sometimes reddish. Its hardness on the miner-alogical scale is 2.5–3.0, and its density is 2, 150 kg/m3. It dissolves readily in water and has a bitter salty taste.

Kainite is formed in salt-bearing beds when marine lagoonsand enclosed salty continental lakes rich in soluble sulfates dryup. Together with other potassium salts, it is found in the USSR (Kalush and Stebnik, Ukrainian SSR) and abroad (Stassfurt, GDR). It is used as a chemical potassium-sulfate fertilizer andin the production of mixed fertilizers.

References in periodicals archive ?
5 Mt of kainite were extracted for use in the chemical plants which the mining company itself operated near Syracuse, for the production of fertilizers.
The company constructed a pre-concentration plant at the mine and, as the water necessary for processing was not available at that site, transported the enriched kainite by cableway to a further plant at Campofranco, a distance of 30 km.
As mining progressed, seams of kainite were encountered, and Realmonte thus became the first Sicilian mine from which it is possible to extract either rock salt or kainite, according to demand.
Initially the concession area was very limited, but discovery of the kainite caused the company to seek an extension to the west.
Pantanelle was conceived as a rock salt mine and worked as such until a few years ago, when prospecting towards the north led to the discovery of kainite
The mine is currently producing about 700 t/d of rock salt and up to 500 t/d of kainite and its reserves are certainly sufficient for more than 30 years at current rates of extraction.
This mine, opened only for the mining of kainite, has suffered problems with its main shaft.
The mine was originally conceived for the extraction of sylvanite and carnallite, but the working of these has now been suspended and kainite is the only mineral being extracted at present.
There are two plants in operation for processing kainite.