Carnallite is an evaporite mineral, a hydrated potassium magnesium chloride with formula: KMgCl3·6(H2O). It is variably colored yellow to white, reddish, and sometimes colorless or blue. It is usually massive to fibrous with rare pseudohexagonal orthorhombic crystals. It is transparent to translucent with a greasy luster. The refractive indices are nα=1.467 nβ=1.476 nγ=1.494. It has a Mohs hardness of 2.5 and a specific gravity of 1.6. The mineral is deliquescent (absorbs moisture from the surrounding air) and specimens must be stored in an airtight container.
Carnallite occurs with a sequence of potassium and magnesium evaporite minerals sylvite, kainite, picromerite, polyhalite and kieserite. Carnallite is a somewhat rare double chloride mineral which only forms under a specific environmental conditions in an evaporating sea or sedimentary basin. It is mined for both potassium and magnesium and occurs in the evaporite deposits of Carlsbad, New Mexico; the Paradox Basin in Colorado and Utah; Stassfurt, Germany; the Perm Basin, Russia; and the Williston Basin in Saskatchewan, Canada. These deposits date from the Devonian through the Permian Periods. In contrast, both Israel and Jordan produce potash from the Dead Sea by using evaporation pans to further concentrate the brine until carnallite precipitates, dredging the carnallite from the pans, and processing to remove the magnesium chloride from the potassium chloride.
US Patent Issued to Karnalyte Resources on Oct. 9 for "Process for the Formulation of Potassium Chloride from a Carnallite Source" (Canadian Inventor)
Oct 11, 2012; ALEXANDRIA, Va., Oct. 11 -- United States Patent no. 8,282,898, issued on Oct. 9, was assigned to Karnalyte Resources Inc....
Wipo Publishes Patent of Yuehua Feng, Weilai Chen, Xiaoli Liu, Xiaofeng Yang, Zuoqi Zhou, Chenggao Sun and Changsha Design and Research Institute of Chemical Industry Ministry for "Method for Producing Potassium Chloride, Sodium Chloride and Magnesium Sheets by Brine Mining from Carnallite Mine" (Chinese Inventors)
Jul 01, 2013; GENEVA, July 1 -- Publication No. WO/2013/091403 was published on June 27.Title of the invention: "METHOD FOR PRODUCING POTASSIUM...