Carnallite  Mineral Data

Carnallite Mineral Data

Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images Share
      News Help About


General Carnallite Information

Help on Chemical  Formula: Chemical Formula: KMgCl3•6(H2O)
Help on Composition: Composition: 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
Help on Empirical Formula: Empirical Formula: KMgCl3•6(H2O)
Help on Environment: Environment: Marine evaporites.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1856
Help on Locality: Locality: Stassfurt, Province of Saxony, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the German mining engineer, R. von Carnall (1804-1874).
Help on Synonym: Synonym: Almeraite - mixture of carnallite and halite.
  ICSD 64691
  PDF 24-869
 

Carnallite Image

Click Here for Larger Carnallite Image in a New Browser Window Images:
Click Here for Larger Carnallite Image

Carnallite   Rinneite

Comments: Orange to light brown rinneite with colorless carnallite.
Location: Merkers, Bad Salzungen, Rhön, Thuringia, Germany. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Click Here for Larger Carnallite Image in a New Browser Window Images:
Click Here for Larger Carnallite Image

Carnallite

Comments: Clear crystalline massive carnallite.
Location: Stassfurt, Sachsen-Anhalt, Germany. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Click Here for Larger Carnallite Image in a New Browser Window Images:
Click Here for Larger Carnallite Image

Carnallite   Rokuhnite

Comments: Reddish brown rokuhnite, with carnallite (deliquescent).
Location: Salzdetfurth Mine, Hildesheim, near Hanover, Niedersachsen, Germany. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Carnallite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5956:1:1.4056
Help on Cell Dimensions: Cell Dimensions: a = 9.56, b = 16.05, c = 22.56, Z = 12; V = 3,461.56 Den(Calc)= 1.60
Help on Crystal System: Crystal System: Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pcna
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.3(1), 2.92(0.7), 4.65(0.5),
Help on Forms: Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 1 0 1) ( 1 1 1) ( 1 1 0) ( 1 0 0) ( 0 0 1)

Warning: this large pop-up is very compute intensive and may not work well with some computers.

Click Here for Large Carnallite Structure Window Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate

Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above


Schlemper E O , Sen Gupta P K , Zoltai T , American Mineralogist , 70 (1985) p.1309-1313, Refinement of the structure of carnallite, Mg(H2O)6KCl3

View Additional jPOWD Structure files for Carnallite
[1]
 

Physical Properties of Carnallite

Help on Cleavage: Cleavage: None
Help on Color: Color: Blue, Colorless, Yellow, White, Red.
Help on Density: Density: 1.6
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Habit: Habit: Pseudo Hexagonal - Crystals show a hexagonal outline.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Greasy (Oily)
Help on Streak: Streak: white
 

Optical Properties of Carnallite

Help on Optical Data: Optical Data: 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

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.64 gm/cc
note: Specific Gravity of Carnallite =1.60 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0089366811
Boson Index = 0.9910633189
Help on Photoelectric: Photoelectric: PECarnallite = 4.07 barns/electron
U=PECarnallite x relectron= 6.66 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 207.54 (Gamma Ray American Petroleum Institute Units)
Concentration of Carnallite per GRapi unit = 0.48 (%)

Estimated Radioactivity from Carnallite - barely detectable

 

Carnallite Classification

Help on  Dana Class: Dana Class: 11.01.02.01 (11)Halide Complexes; Alumino-fluorides
  (11.01)where (A)m B (X)3
  (11.01.02)Dana Group
 
11.01.02.01 Carnallite KMgCl3•6(H2O) Pcna 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 03.BA.10 03 - HALIDES
  03.B - Simple Halides, with H2O
  03.BA -M:X = 1:1 and 2:3
 
03.BA.10 Carnallite KMgCl3•6(H2O) Pcna 2/m 2/m 2/m
 

Other Carnallite Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Mason68)
Help on See Also: See Also: 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 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

Search for Carnallite using:

Google
 
Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Carnallite :

A Bijoux Google Search for Carnallite
Adam's Minerals Google Search for Carnallite
Cape Minerals Google Search for Carnallite
Dakota Matrix Minerals Google Search for Carnallite
Excalibur Mineral Corp. Google Search for Carnallite
Exceptional Minerals Google Search for Carnallite
John Betts Fine Minerals Search for Carnallite
McDougall Minerals Google Search for Carnallite
Mineral News Website Link
Rock and Mineral Shows Google Search for Carnallite
Weinrich Minerals, Inc. Google Search for Carnallite

Ask about Carnallite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Carnallite Specimen Label here :

Carnallite

KMgCl3•6(H2O)
Dana No: 11.01.02.01 Strunz No: 03.BA.10
Locality:

 

Notes: