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Related to Carnallite: sylvinite, sylvite


KMgCl3·6H2O A milky-white or reddish mineral that crystallizes in the orthorhombic system and occurs in deliquescent masses; it is valuable as an ore of potassium.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



(named after the German geologist R. von Car-nall, 1804–74), a mineral, a complex hydrated chloride of magnesium and potassium with composition KCl -MgCl2’6H2O. It usually also has insignificant amounts of Br, Li, Rb, Cs, and mechanical particles of clay minerals, hematite, and hydrated oxides of iron. Carnallite crystallizes in the orthorhombic system and usually forms granular aggregates with halite, sylvite, and other salt deposit minerals. It is colorless or tinted murky brown, reddish pink, and other colors as a result of impurities contained in it. Carnallite is hygroscopic and characterized by a bitter salty burning taste. Its hardness on the mineralogical scale is 2–3; it has a density of 1, 600 kg/m3. It is one of the principal minerals in potassium salt deposits. The largest deposit in the USSR is at Solikamsk in the Urals. Major deposits abroad are found in the German Democratic Republic (Stassfurt, Aschersleben), the Federal Republic of Germany, the United States, and Tunisia.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
This report focuses on the global Carnallite status, future forecast, growth opportunity, key market and key players.
Vale is developing a 1.2 mtpa carnallite solution mining project within the basin, and has built a functioning pilot plant which has proved solution mining of carnallite in the Sergipe basin is commercially feasible.
The Solikamsk plant so far obtains magnesium from carnallite supplied by the Urals-based Silvinit company.
These large borate nodules are rare, and appear to be associated with an indistinct carnallite band found at or near the base of the Boulby Potash in the north and west of the mine.
The process involves solar evaporation pans covering 49 |mile.sup.2~ (100 |km.sup.2~) to precipitate potassium and magnesium-containing carnallite, which is recovered from the pans using a special floating harvester designed by Jacobs.
* A potassium-rich formation, made up of alternating layers of carnallite, sylvinite and rock salt.