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This page provides mineralogical data about Chelkarite.
Classification of Chelkarite
|IMA status:||Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"|
|Strunz 8th edition ID:||5/J.02-20|
|Nickel-Strunz 10th (pending) edition ID:||6.HA.05|
6 : BORATES
H : Unclassified borates
|Dana 8th edition ID:||22.214.171.124|
26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
7 : Miscellaneous
|Hey's CIM Ref.:||10.1.15|
10 : Borates with other anions
1 : Borates with halide
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Type Occurrence of Chelkarite
|Type Locality:||Chelkar salt dome, Aksai Valley, Aktobe Province (Aqtöbe Oblysy; Aktubinskaya Oblast'), Kazakhstan|
|Year of Discovery:||1968|
Crystallography of Chelkarite
|Cell Parameters:||a = 13.69Å, b = 20.84Å, c = 8.26Å|
|Ratio:||a:b:c = 0.657 : 1 : 0.396|
|Unit Cell Volume:||V 2,356.57 Å³ (Calculated from Unit Cell)|
Optical Data of Chelkarite
|RI values:||nα = 1.520 nγ = 1.558|
|Maximum Birefringence:||δ = 0.038|
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
|Dispersion:||weak to moderate|
Chemical Properties of Chelkarite
|Simplified for copy/paste:||CaMgB2O4(Cl,OH)2·5H2O Or near, with Cl:OH = 3:1|
|Essential elements:||B, Ca, Cl, H, Mg, O|
|All elements listed in formula:||B, Ca, Cl, H, Mg, O|
Relationship of Chelkarite to other Species
|Related Minerals - Nickel-Strunz Grouping):|
|Related Minerals - Hey's Index Grouping:|
Other Names for Chelkarite
|Health Warning:||No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.|
References for Chelkarite
American Mineralogist (1971): 56: 1122.
Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).
Internet Links for Chelkarite
Localities for Chelkarite
The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
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