Also found in: Dictionary, Thesaurus, Wikipedia.
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.



(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.

References in periodicals archive ?
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 occurrence and petrological significance of carnallite within the evaporite sequences is discussed in detail by Stewart (1956).
2~) to precipitate potassium and magnesium-containing carnallite, which is recovered from the pans using a special floating harvester designed by Jacobs.
At a Metal Bulletin conference (Moscow) in June, Pavel Detkov, vice president of marketing for Russia's Solikamsk Magnesium Works, said that feed for four of the five CIS primary-magnesium plants comes from the Verkne-Kamskeo carnallite deposit in the Ural mountains.
A potassium-rich formation, made up of alternating layers of carnallite, sylvinite and rock salt.
The Bayovar Concessions, located in the Sechura area, Piura province, Peru, include blocks number 5, 6, 7 and 8, and cover approximately 82,000 hectares (202,600 acres) with potential for production of carnallite, potassium chloride (KCl), phosphates and other minerals.
DSW plans to produce magnesium from carnallite which is the method used at all five production plants, in the CIS.
According to GSFC, it has executed definitive agreements and committed a strategic investment of nearly C$60 million in Canada's Karnalyte Resources Inc (Wynyard Carnallite Project) for securing long-term supply of potash.
The plant would be based on Russian carnallite technology and would be built in two stages of 25,000 mt each in 1995 and 1998.