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Metavauxite Mineral Data

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General Metavauxite Information

Help on Chemical  Formula: Chemical Formula: Fe++Al2(PO4)2(OH)2•8(H2O)
Help on Composition: Composition: Molecular Weight = 477.89 gm
   Aluminum    11.29 %  Al   21.34 % Al2O3
   Iron        11.69 %  Fe   15.03 % FeO
   Phosphorus  12.96 %  P    29.70 % P2O5
   Hydrogen     3.80 %  H    33.93 % H2O
   Oxygen      60.26 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+Al2(PO4)2(OH)2•8(H2O)
Help on Environment: Environment: Dimorphous with paravauxite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1922
Help on Locality: Locality: Siglo XX mine, Llallagua, Potos�, Bolivia Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the chemical relationship to vauxite.
Help on Name Pronunciation: Name Pronunciation: Metavauxite + Pronunciation Say METAVAUXITE
Help on Synonym: Synonym: ICSD 24909
  PDF 33-639
 

Metavauxite Image

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  Metavauxite

Comments: Clear acicular crystals of metavauxite.
Location: Llallagua, Potosi Department, Bolivia. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

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  Metavauxite

Comments: Creamy colored prismatic metavauxite crystals to 3mm.
Location: Siglo XX, Llallagua, Bolivia. Scale: Picture size 3 mm.
© Tom Loomis / Dakota Matrix

Metavauxite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.069:1:0.7262
Help on Cell Dimensions: Cell Dimensions: a = 10.248, b = 9.586, c = 6.962, Z = 2; beta = 97.87° V = 677.49 Den(Calc)= 2.34
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): 4.687(1), 4.337(0.8), 10.12(0.7),
Help on Forms: Forms:

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Help on Above

Forms: ( 1 1 1) ( 1 1 0) ( 1 1 1) ( 2 1 1) ( 1 0 1) ( 1 0 0)

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Physical Properties of Metavauxite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless, White, Light green.
Help on Density: Density: 2.345
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Metavauxite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.009 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.007 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2405,KPDmeas= 0.2399,KC= 0.2421
Ncalc = 1.57
Help on Optical Data: Optical Data: Biaxial (+), a=1.55, b=1.561, g=1.577, bire=0.0270
 

Calculated Properties of Metavauxite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.39 gm/cc
note: Specific Gravity of Metavauxite =2.34 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0027724234
Boson Index = 0.9972275766
Help on Photoelectric: Photoelectric: PEMetavauxite = 4.37 barns/electron
U=PEMetavauxite x rElectron Density= 10.44 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Metavauxite is Not Radioactive
 

Metavauxite Classification

Help on  Dana Class: Dana Class: 42.11.11.01 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.11)where (AB)4 (XO4)3 Zq � x(H2O)
  (42.11.11)Dana Group
 
42.11.11.01 Metavauxite FeAl2(PO4)2(OH)2•8(H2O) P 21/c 2/m
Help on  Strunz Class: Strunz Class: 08.DC.25 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.25 Ferrostrunzite FeFe2(PO4)2(OH)2•6(H2O) P 1,P1 Tri
 
08.DC.25 Ferristrunzite FeFe2(PO4)2(OH)3•5(H2O) P1,P 1 Tri
 
08.DC.25 Metavauxite FeAl2(PO4)2(OH)2•8(H2O) P 21/c 2/m
 
08.DC.25 Strunzite MnFe2(PO4)2(OH)2•6(H2O) P1 1
 

Other Metavauxite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Metavauxite :
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 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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

Metavauxite

Fe++Al2(PO4)2(OH)2•8(H2O)
Dana No: 42.11.11.01 Strunz No: 08.DC.25
Locality:

 

Notes:

 

 
   
 


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