Mineralogy Database

Chlormagaluminite Mineral Data

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General Chlormagaluminite Information

Help on Chemical  Formula: Chemical Formula: (Mg,Fe++)4Al2(OH)12(Cl2,CO3)•2(H2O)
Help on Composition: Composition: Molecular Weight = 472.53 gm
   Magnesium  18.00 %  Mg   29.85 % MgO
   Aluminum   11.42 %  Al   21.58 % Al2O3
   Iron        5.91 %  Fe    7.60 % FeO
   Hydrogen    3.41 %  H    30.50 % H2O
   Carbon      1.27 %  C     4.66 % CO2
   Chlorine    7.50 %  Cl    7.50 % Cl
                -   %   Cl   -1.69 % -O=Cl2   
   Oxygen     52.48 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg3.5Fe2+0.5Al2(OH)12Cl(CO3)0.5•2(H2O)
Help on Environment: Environment: In skarns associated with magnetite and chlorite.
Help on IMA Status: IMA Status: Approved IMA 1982
Help on Locality: Locality: Kapaev explosion pipe, Angara River, southern Siberian Platform, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its composition (Chloride, Magnesium, Aluminum).
Help on Synonym: Synonym: Chlormanasseite

Chlormagaluminite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.92249
Help on Cell Dimensions: Cell Dimensions: a = 5.29, c = 15.46, Z = 1; V = 374.67 Den(Calc)= 2.09
Help on Crystal System: Crystal System: Hexagonal Space Group: P 6/mcm, P 6cm, P 6c2
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.839(1), 7.67(1), 2.34(0.9),

Physical Properties of Chlormagaluminite

Help on Cleavage: Cleavage: {0001} Good
Help on Color: Color: Colorless, Yellow brown.
Help on Density: Density: 1.98 - 2.09, Average = 2.03
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Hexagonal - Six-sided crystal shape in cross-section or habit.
Help on Habit: Habit: Pyramidal - Crystals are shaped like pyramids.
Help on Hardness: Hardness: 1.5-2.5 - Hardness very near Gypsum
Help on Luster: Luster: Pearly
Help on Streak: Streak: white

Optical Properties of Chlormagaluminite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.056 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.028 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2632,KPDmeas= 0.2703,KC= 0.2559
Ncalc = 1.51 - 1.53
Help on Optical Data: Optical Data: Uniaxial (+), w=1.54, e=1.56, bire=0.0200.

Calculated Properties of Chlormagaluminite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.13 gm/cc
note: Specific Gravity of Chlormagaluminite =2.09 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEChlormagaluminite = 2.99 barns/electron
U=PEChlormagaluminite x rElectron Density= 6.37 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Chlormagaluminite is Not Radioactive

Chlormagaluminite Classification

Help on  Dana Class: Dana Class: (10)Oxyhalides and Hydroxyhalides
  (10.06)where Am Bn (O,OH)p Xq
  (10.06.10)Dana Group Chlormagaluminite (Mg,Fe)4Al2(OH)12(Cl2,CO3)•2(H2O) P 6/mcm, P 6cm, P 6c2 Hex
Help on  Strunz Class: Strunz Class: 05.DA.45 05 - CARBONATES (NITRATES)
  05.D - Carbonates with Additional Anions, with H2O
  05.DA -With medium-sized cations
05.DA.45 Brugnatellite Mg6Fe(CO3)(OH)13•4(H2O) P 63/mmc 6/m 2/m 2/m
05.DA.45 Barbertonite Mg6Cr2(CO3)(OH)16•4(H2O) P 63/mmc 6/m 2/m 2/m
05.DA.45 Chlormagaluminite (Mg,Fe)4Al2(OH)12(Cl2,CO3)•2(H2O) P 6/mcm, P 6cm, P 6c2 Hex
05.DA.45 Zaccagnaite! Zn4Al2(OH)12(CO3)•3(H2O) P 63/mmc 6/m 2/m 2/m
05.DA.45 Manasseite Mg6Al2(CO3)(OH)16•4(H2O) P 63/mmc 6/m 2/m 2/m
05.DA.45 Sjogrenite Mg6Fe2(CO3)(OH)16•4(H2O) P 63/mmc 6/m 2/m 2/m

Other Chlormagaluminite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Chlormagaluminite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - Ecole des Mines de Paris
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info

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Dana No: Strunz No: 05.DA.45





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