| Carnallite Mineral Data |
General Carnallite Information |
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| KMgCl3·6(H2O) | |||
| Molecular Weight = 277.85 gm | |||
| Potassium 14.07 % K 16.95 % K2O | |||
| Magnesium 8.75 % Mg 14.51 % MgO | |||
| Hydrogen 4.35 % H 38.90 % H2O | |||
| Chlorine 38.28 % Cl 38.28 % Cl | |||
| - % Cl -8.64 % -O=Cl2 | |||
| Oxygen 34.55 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| KMgCl3·6(H2O) | |||
| Marine evaporites. | |||
| Valid Species (Pre-IMA) 1856 | |||
| Stassfurt, Province of Saxony, Germany. Link to MinDat.org Location Data. | |||
| Named after the German mining engineer, R. von Carnall (1804-1874). | |||
| ICSD 64691 | |||
| PDF 24-869 | |||
Carnallite Image | |||
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Carnallite Crystallography |
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| a:b:c =0.5956:1:1.4056 | |||
| a = 9.56, b = 16.05, c = 22.56, Z = 12; V = 3,461.56 Den(Calc)= 1.60 | |||
| Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pcna | |||
| By Intensity(I/Io): 3.3(1), 2.92(0.7), 4.65(0.5), | |||
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Physical Properties of Carnallite |
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| None | |||
| Blue, Colorless, Yellow, White, Red. | |||
| 1.6 | |||
| Transparent to translucent | |||
| Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz). | |||
| Fibrous - Crystals made up of fibers. | |||
| Massive - Granular - Common texture observed in granite and other igneous rock. | |||
| Pseudo Hexagonal - Crystals show a hexagonal outline. | |||
| 2.5 - Finger Nail | |||
| Fluorescent. | |||
| Greasy (Oily) | |||
| white | |||
Optical Properties of Carnallite |
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| CI meas= 0.051 (Good) - where the CI = (1-KPDmeas/KC) CI calc= 0.051 (Good) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2993,KPDmeas= 0.2993,KC= 0.3155 |
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| Biaxial (+), a=1.467, b=1.4755, g=1.494, bire=0.0270, 2V(Calc)=70, 2V(Meas)=70. Dispersion none. | |||
Calculated Properties of Carnallite |
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relectron=1.64 gm/cc |
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| Fermion Index = 0.00893 Boson Index = 0.99107 |
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PECarnallite = 4.07 barns/electron |
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| GRapi = 207.54 (Gamma Ray American Petroleum Institute Units) Estimated Radioactivity from Carnallite |
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Carnallite Classification |
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| 11.1.2.1 (11)Halide Complexes; Alumino-fluorides | |||
| (11.1)where (A)m B (X)3 | |||
| (11.1.2)Dana Group | |||
| III/C.08-10 III - Halogenides | |||
| III/C - Double halogenides with water, Chlorides | |||
| III/C.08 - Carnallite - Tachyhydrite series | |||
Other Carnallite Information |
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| NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Mason68) | |||
| Links to other databases for Carnallite : 1 - Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 - Athena 4 - EUROmin Project 5 - Ecole des Mines de Paris 6 - Google Images 7 - Google Scholar 8 - Handbook of Mineralogy (MinSocAm) 9 - MinDAT 10 - MinMax(Deutsch) 11 - MinMax(English) 12 - Mineralienatlas (Deutsch) 13 - QUT Mineral Atlas 14 - Ruff.Info 15 - WWW-MINCRYST Search for Carnallite using: Visit our Advertisers for Carnallite : AA Mineral SpecimensB & L Fine Minerals Dan Weinrich Fine Minerals Dan Weinrich Auctions Excalibur Minerals Exceptional Minerals Fabre Minerals Greenside Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club MineralsWeb Fine Minerals The GeoZone Wrights Rock Shop Translate Carnallite Mineral Data : Ask about Carnallite here : Print or Cut-and-Paste your Carnallite Specimen Label here :
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