Magnesioaubertite Mineral Data
General Magnesioaubertite Information
Chemical Formula:
(Mg,Cu)Al(SO4)2Cl•14(H2O)
Composition:
Molecular Weight = 540.89 gm
Magnesium 3.37 % Mg 5.59 % MgO
Aluminum 4.99 % Al 9.43 % Al2 O3
Copper 2.94 % Cu 3.68 % CuO
Hydrogen 5.22 % H 46.63 % H2 O
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
Empirical Formula:
Mg0.75 Cu0.25 Al(SO4 )2 Cl•14(H2 O)
Environment:
Secondary mineral formed by the reaction of volcanic gases and aluminum-bearing rocks.
IMA Status:
Approved IMA 1988
Locality:
Grotta de Faraglione and along the Baia de Levante, Vulcano, Lipari Islands, Italy. Link to MinDat.org Location Data.
Name Origin:
Named for its content of magnesium greater than copper, and relation to aubertite.
Name Pronunciation:
Magnesioaubertite
Magnesioaubertite Image
Images:
Magnesioaubertite Crystallography
Axial Ratios:
a:b:c =0.478:1:0.4765
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
Crystal System:
Triclinic - Pinacoidal H-M Symbol ( 1 ) Space Group: P1
X Ray Diffraction:
By Intensity(I/Io ): 4.5(1), 3.97(0.8), 5.61(0.7),
Physical Properties of Magnesioaubertite
Color:
Blue.
Density:
1.8
Diaphaneity:
Transparent
Hardness:
2-3 - Gypsum-Calcite
Luster:
Vitreous (Glassy)
Optical Properties of Magnesioaubertite
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
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
Electron Density:
Bulk Density (Electron Density)=1.88 gm/cc note: Specific Gravity of Magnesioaubertite =1.80 gm/cc.
Fermion Index:
Fermion Index = 0.0045795804 Boson Index = 0.9954204196
Photoelectric:
PEMagnesioaubertite = 2.66 barns/electronU=PEMagnesioaubertite x r Electron Density= 4.99 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Magnesioaubertite is Not Radioactive
Magnesioaubertite Classification
Dana Class:
31.09.08.03 (31) Hydrated Sulfates Containing Hydroxyl or Halogen
(31.09) where (A+ B++) (XO4) Zq�x(H2O)
(31.09.08) Aubertite Group
31.09.08.01 Aubertite CuAl(SO4)2Cl•14(H2O) P1 1
31.09.08.02 Svyazhinite MgAl(SO4)2F•14(H2O) P1,P 1 Tri
31.09.08.03 Magnesioaubertite (Mg,Cu)Al(SO4)2Cl•14(H2O) P1 1
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
References:
NAME( AntBidBlaNic5) PHYS. PROP.(Am.Min.,Vol.75,p1433,1990) OPTIC PROP.(Am.Min.,Vol.75,p1433,1990)
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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Magnesioaubertite
(Mg,Cu)Al(SO4)2Cl•14(H2O)
Dana No: 31.09.08.03 Strunz No: 07.DB.05
Locality:
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