Mineralogy Database

Magnesioaubertite Mineral Data

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General Magnesioaubertite Information

Help on Chemical  Formula: Chemical Formula: (Mg,Cu)Al(SO4)2Cl•14(H2O)
Help on Composition: Composition: Molecular Weight = 540.89 gm
   Magnesium   3.37 %  Mg    5.59 % MgO
   Aluminum    4.99 %  Al    9.43 % Al2O3
   Copper      2.94 %  Cu    3.68 % CuO
   Hydrogen    5.22 %  H    46.63 % H2O
   Sulfur     11.86 %  S    29.60 % SO3
   Chlorine    6.55 %  Cl    6.55 % Cl
                -   %   Cl   -1.48 % -O=Cl2   
   Oxygen     65.08 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg0.75Cu0.25Al(SO4)2Cl•14(H2O)
Help on Environment: Environment: Secondary mineral formed by the reaction of volcanic gases and aluminum-bearing rocks.
Help on IMA Status: IMA Status: Approved IMA 1988
Help on Locality: Locality: Grotta de Faraglione and along the Baia de Levante, Vulcano, Lipari Islands, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its content of magnesium greater than copper, and relation to aubertite.
Help on Name Pronunciation: Name Pronunciation: Magnesioaubertite Say MAGNESIOAUBERTITE

Magnesioaubertite Image

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  Magnesioaubertite   Pickeringite

Comments: Aqua crystalline magnesioaubertite with white pickeringite.
Location: Grotto di Faraglione, Vulcano, Sicily, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Magnesioaubertite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.478:1:0.4765
Help on Cell Dimensions: Cell Dimensions: a = 6.31, b = 13.2, c = 6.29, Z = 1; alpha = 91.7°, beta = 94.5°, gamma = 82.6° V = 517.71 Den(Calc)= 1.73
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.5(1), 3.97(0.8), 5.61(0.7),

Physical Properties of Magnesioaubertite

Help on Color: Color: Blue.
Help on Density: Density: 1.8
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Luster: Luster: Vitreous (Glassy)

Optical Properties of Magnesioaubertite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.011 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.029 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2764,KPDmeas= 0.2656,KC= 0.2686
Ncalc = 1.46 - 1.48
Help on Optical Data: Optical Data: Biaxial (-), a=1.466, b=1.481, g=1.4875, bire=0.0215, 2V(Calc)=66, 2V(Meas)=112-114.

Calculated Properties of Magnesioaubertite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.88 gm/cc
note: Specific Gravity of Magnesioaubertite =1.80 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0045795804
Boson Index = 0.9954204196
Help on Photoelectric: Photoelectric: PEMagnesioaubertite = 2.66 barns/electron
U=PEMagnesioaubertite x rElectron Density= 4.99 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Magnesioaubertite is Not Radioactive

Magnesioaubertite Classification

Help on  Dana Class: Dana Class: (31)Hydrated Sulfates Containing Hydroxyl or Halogen
  (31.09)where (A+ B++) (XO4) Zq�x(H2O)
  (31.09.08)Aubertite Group Aubertite CuAl(SO4)2Cl•14(H2O) P1 1 Svyazhinite MgAl(SO4)2F•14(H2O) P1,P 1 Tri Magnesioaubertite (Mg,Cu)Al(SO4)2Cl•14(H2O) P1 1
Help on  Strunz Class: Strunz Class: 07.DB.05 07 - SULFATES (SELENATES, TELLURATES)
  07.D - Sulfates (selenates, etc.) with additional anions, with H2O
  07.DB -With only medium-sized cations; insular octahedra and finite groups
07.DB.05 Aubertite CuAl(SO4)2Cl•14(H2O) P1 1
07.DB.05 Magnesioaubertite (Mg,Cu)Al(SO4)2Cl•14(H2O) P1 1
07.DB.05 Svyazhinite MgAl(SO4)2F•14(H2O) P1,P 1 Tri

Other Magnesioaubertite Information

Help on References: References: NAME( AntBidBlaNic5) PHYS. PROP.(Am.Min.,Vol.75,p1433,1990) OPTIC PROP.(Am.Min.,Vol.75,p1433,1990)
Help on See Also: See Also: Links to other databases for Magnesioaubertite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: Strunz No: 07.DB.05





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