By pressure, polysynthetic twin lamellae can be developed
Cleavage
None
Fracture
Conchoidal
Mohs scale hardness
2.5
Luster
Greasy
Streak
White
Diaphaneity
Transparent to translucent
Specific gravity
1.6
Density
1.598 g/cm3
Optical properties
Biaxial (+)
Refractive index
nα = 1.467 nβ = 1.476 nγ = 1.494
Birefringence
0.0270
2V angle
70
References
[2][3][4][5]
Carnallite (also carnalite) is an evaporite mineral, a hydrated potassium magnesium chloride with formula KCl.MgCl2·6(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. 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 an uncommon double chloride mineral that only forms under 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.[5]
Carnallite was first described in 1856 from its type location of Stassfurt Deposit, Saxony-Anhalt, Germany. It was named for the Prussian mining engineer Rudolf von Carnall (1804–1874).[5]
Carnallite (also carnalite) is an evaporite mineral, a hydrated potassium magnesium chloride with formula KCl.MgCl2·6(H2O). It is variably colored yellow...
with the balance being insoluble clays, anhydrite and in some locations carnallite. Other deposits of sylvinite are located in Belarus, Brazil, France, Germany...
marine evaporites are calcite, gypsum and anhydrite, halite, sylvite, carnallite, langbeinite, polyhalite, and kainite. Kieserite (MgSO4) may also be included...
chloride NaCl), sylvite (potassium chloride KCl), bischofite (MgCl2∙6H2O), carnallite (KCl∙MgCl2∙6H2O), and kainite (KCl∙MgSO4∙3H2O). It is also found in evaporite...
are salt basins where bischofite is mixed with other minerals such as carnallite, halite, kieserite and anhydrite. These are the so-called bischofite containing...
a lilac flame. Potassium chloride is extracted from minerals sylvite, carnallite, and potash. It is also extracted from salt water and can be manufactured...
evaporite sequences associated with gypsum, anhydrite, halite, sylvite, carnallite, kainite and hilgardite. It was first described in 1789 for specimens...
found naturally in small amounts in some minerals such as: bischofite and carnallite, and in sea water, such as that of the Dead Sea. Magnesium bromide can...
structure on heating. Caesium chloride occurs naturally as impurities in carnallite (up to 0.002%), sylvite and kainite. Less than 20 tonnes of CsCl is produced...
potassium and occurs in marine evaporite deposits in association with carnallite, halite, and sylvite. It was first described in 1891 for an occurrence...
common element on Earth. It is contained in magnesite, dolomite, brucite, carnallite, talc, and magnesium minerals. China is now the biggest producer of crude...
is found in more than 60 minerals, only dolomite, magnesite, brucite, carnallite, talc, and olivine are of commercial importance. The Mg2+ cation is the...
which is well above the average in the Earth's crust. Sylvite (KCl), carnallite (KCl·MgCl2·6H2O), kainite (MgSO4·KCl·3H2O) and langbeinite (MgSO4·K2SO4)...
minerals (lepidolites, biotites, feldspar, carnallite) contain it, together with caesium. Pollucite, carnallite, leucite, and lepidolite are all minerals...
water. The precipitated raw carnallite is the raw material for producing potash is precipitated as mixture of carnallite (KCl.MgCl2.6H2O) and NaCl. This...
magnesium and potassium have been tried as salt substitutes. They include: carnallite (KMgCl3•6H2O) kainite (KCl•MgSO4•2H2O) langbeinite (K2Mg2(SO4)2) sylvite...
the entire southern end of the Dead Sea for the purpose of producing carnallite, potassium magnesium chloride, which is then processed further to produce...
tonnes of sylvinite ore. 1934 - Start of construction. 1944 - Start of carnallite production. 1954 - Launch of the first mine group with the annual capacity...
readily as rubidium does, the alkali evaporite minerals sylvite (KCl) and carnallite (KMgCl 3·6H 2O) may contain only 0.002% caesium. Consequently, caesium...
or copper.: 4 It occurs naturally in the minerals leucite, pollucite, carnallite, and zinnwaldite, which contain as much as 1% rubidium oxide. Lepidolite...
Evaporite deposits may contain potassium minerals such as sylvite and carnallite. When this is the case, spectral gamma ray logging should be done to identify...
volcanic environments as a sublimate. It occurs in association with halite, carnallite, polyhalite, anhydrite, boracite, sulfoborite, leonite, epsomite and celestine...
Symbol Name Symbol Name Symbol Name Symbol Name Symbol Cabalzarite Clz Carnallite Cna Chenguodaite Cgu Clinoamphibole Cam Coyoteite Coy Cabriite Cbr Carnotite...
the mineral that is most commonly mined for chlorine, but the minerals carnallite and sylvite are also mined for chlorine. Forty million metric tons of...
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