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Maghrebite Mineral Data

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General Maghrebite Information

Help on Chemical  Formula: Chemical Formula: MgAl2(AsO4)2(OH)2•8H2O
Help on Composition: Composition: Molecular Weight = 534.24 gm
   Magnesium   4.55 %  Mg    7.54 % MgO
   Aluminum   10.10 %  Al   19.09 % Al2O3
   Arsenic    28.05 %  As   43.02 % As2O5
   Hydrogen    3.40 %  H    30.35 % H2O
   Oxygen     53.91 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: MgAl2(AsO4)2(OH)2•8(H2O)
Help on Environment: Environment: Laueite group. As analogue of Gordonite.
Help on IMA Status: IMA Status: Proposed IMA 2005 (Dana # Added)
Help on Locality: Locality: Aghbar mine near Bou Azzer, Anti-Atlas, Morocco Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Commission on New Minerals, Nomenclature and Classification (CNMNC)
Help on Synonym: Synonym: IMA2005-044
 

Maghrebite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.7683:1:1.484
Help on Cell Dimensions: Cell Dimensions: a = 5.436, b = 7.075, c = 10.5, Z = 2; alpha = 97.701°, beta = 102.021°, gamma = 110.295° V = 367.11 Den(Calc)= 4.83
Help on Crystal System: Crystal System: Triclinic - Pedial H-M Symbol (1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 9.9(1), 6.4(0.9), 4.9(0.8),2.622(0.6), 2.885(0.6), 3.198(0.6), 4.08(0.5), 3.314(0.4),
 

Optical Properties of Maghrebite

Help on Optical Data: Optical Data: NCalc= 2.12 - from Gladstone-Dale relationship (KC = 0.2275) where Ncalc=Dcalc*KC+1
 

Calculated Properties of Maghrebite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.89 gm/cc
note: Specific Gravity of Maghrebite =4.91 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0048132672
Boson Index = 0.9951867328
Help on Photoelectric: Photoelectric: PEMaghrebite = 18.74 barns/electron
U=PEMaghrebite x rElectron Density= 91.65 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Maghrebite is Not Radioactive
 

Maghrebite Classification

Help on  Dana Class: Dana Class: 42.11.14.07 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.11)where (AB)4 (XO4)3 Zq � x(H2O)
  (42.11.14)Vauxite Group
 
42.11.14.01 Vauxite FeAl2(PO4)2(OH)2•6(H2O) P1 1
 
42.11.14.02 Paravauxite FeAl2(PO4)2(OH)2•8(H2O) P1 1
 
42.11.14.03 Sigloite FeAl2(PO4)2(OH)3•5(H2O) P1 1
 
42.11.14.04 Gordonite MgAl2(PO4)2(OH)2•8(H2O) P1 1
 
42.11.14.05 Mangangordonite (Mn,Fe,Mg)Al2(PO4)2(OH)2•8(H2O) P1 1
 
42.11.14.06 Kastningite! (Mn,Fe,Mg)Al2(PO4)2(OH)2•8(H2O) P1 1
 
42.11.14.07 Maghrebite! MgAl2(AsO4)2(OH)2•8H2O P1 1
Help on  Strunz Class: Strunz Class: 08.DC.30 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DC -With only medium-sized cations, (OH, etc.):RO4 = 1:1 and < 2:1
 
08.DC.30 Gordonite MgAl2(PO4)2(OH)2•8(H2O) P1 1
 
08.DC.30 Ferrolaueite! FeFe2(PO4)2(OH)2•8(H2O) Tri
 
08.DC.30 Mangangordonite (Mn,Fe,Mg)Al2(PO4)2(OH)2•8(H2O) P1 1
 
08.DC.30 Laueite MnFe2(PO4)2(OH)2•8(H2O) P1 1
 
08.DC.30 Sigloite FeAl2(PO4)2(OH)3•5(H2O) P1 1
 
08.DC.30 Pseudolaueite MnFe2(PO4)2(OH)2•7-8(H2O) P 21/a 2/m
 
08.DC.30 Paravauxite FeAl2(PO4)2(OH)2•8(H2O) P1 1
 
08.DC.30 Stewartite MnFe2(PO4)2(OH)2•8(H2O) P1 1
 
08.DC.30 Ushkovite MgFe2(PO4)2(OH)2•8(H2O) P1 1
 
08.DC.30 Kastningite! (Mn,Fe,Mg)Al2(PO4)2(OH)2•8(H2O) P1 1
 
08.DC.30 Maghrebite! MgAl2(AsO4)2(OH)2•8H2O P1 1
 

Other Maghrebite Information

Help on See Also: See Also: Links to other databases for Maghrebite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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

Maghrebite

MgAl2(AsO4)2(OH)2•8H2O
Dana No: 42.11.14.07 Strunz No: 08.DC.30
Locality:

 

Notes:

 

 
   
 


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