Mineralogy Database

Meta-aluminite Mineral Data

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General Meta-aluminite Information

Help on Chemical  Formula: Chemical Formula: Al2(SO4)(OH)4•5(H2O)
Help on Composition: Composition: Molecular Weight = 308.13 gm
   Aluminum  17.51 %  Al   33.09 % Al2O3
   Hydrogen   4.58 %  H    40.93 % H2O
   Sulfur    10.41 %  S    25.98 % SO3
   Oxygen    67.50 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Al2(SO4)(OH)4•5(H2O)
Help on IMA Status: IMA Status: Approved IMA 1968
Help on Locality: Locality: Fumerole uranium mine, Temple Mountain, San Rafael Swell, Every County, Utah, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the lower hydrate of aluminite.

Meta-aluminite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4698:1:0.4356
Help on Cell Dimensions: Cell Dimensions: a = 7.93, b = 16.879, c = 7.353, Z = 4; beta = 106.74° V = 942.49 Den(Calc)= 2.17
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/c ?
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.48(1), 8.35(0.79), 4.36(0.67),

Physical Properties of Meta-aluminite

Help on Color: Color: Snow white.
Help on Density: Density: 1.85 - 2.18, Average = 2.01
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Nodular - Tuberose forms having irregular protuberances over the surface.
Help on Hardness: Hardness: 1-2 - Between Talc and Gypsum
Help on Luster: Luster: Silky
Help on Streak: Streak: white

Optical Properties of Meta-aluminite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.007 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.078 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2338,KPDmeas= 0.2518,KC= 0.2536
Ncalc = 1.47 - 1.55
Help on Optical Data: Optical Data: Biaxial (-), a=1.497, b=1.512, g=1.513, bire=0.0160

Calculated Properties of Meta-aluminite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.09 gm/cc
note: Specific Gravity of Meta-aluminite =2.02 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.001111366
Boson Index = 0.998888634
Help on Photoelectric: Photoelectric: PEMeta-aluminite = 1.25 barns/electron
U=PEMeta-aluminite x rElectron Density= 2.61 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Meta-aluminite is Not Radioactive

Meta-aluminite Classification

Help on  Dana Class: Dana Class: (31)Hydrated Sulfates Containing Hydroxyl or Halogen
  (31.07)where (A+ B++)2 (XO4) Zq�x(H2O)
  (31.07.05)Dana Group Meta-aluminite Al2(SO4)(OH)4•5(H2O) P 21/c ? 2/m
Help on  Strunz Class: Strunz Class: 07.DC.05 07 - SULFATES (SELENATES, TELLURATES)
  07.D - Sulfates (selenates, etc.) with additional anions, with H2O
  07.DC -With only medium-sized cations; chains of corner-sharing octahedra
07.DC.05 Aluminite Al2(SO4)(OH)4•7(H2O) P 21/c 2/m
07.DC.05 Meta-aluminite Al2(SO4)(OH)4•5(H2O) P 21/c ? 2/m

Other Meta-aluminite 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 Meta-aluminite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
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.DC.05





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