Paravauxite Mineral Data

Paravauxite Mineral Data
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General Paravauxite 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: Associated with vauxite, metavauxite and wavellite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1922
Help on Locality: Locality: Llallagua, Potosi, Bolivia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the chemical similarity to vauxite. Polymorph of metavauxite.
Help on Name Pronunciation: Name Pronunciation: Paravauxite + Pronunciation Say PARAVAUXITE
Help on Synonym: Synonym: ICSD 24456
  PDF 29-1424
 

Paravauxite Image

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Paravauxite

Comments: Radiating group of pastel blue/green paravauxite crystals to 1cm.
Location: Siglo XX Mine, Llallagua, Bolivia. Scale: 1.8 x 1.5 x 1 cm.
© Isaias Casanova / IC Minerals
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Paravauxite

Comments: Light-green, elongated paravauxite crystals.
Location: Siglo XX mine, Llallagua, Bolivia. Scale: Crystal size 1 cm.
© Sandro Maggia/Minernet.it

Paravauxite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.4961:1:0.6602
Help on Cell Dimensions: Cell Dimensions: a = 5.239, b = 10.56, c = 6.972, Z = 1; alpha = 106.8°, beta = 110.78°, gamma = 72.13° V = 328.58 Den(Calc)= 2.41
Help on Crystal System: Crystal System: Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 9.89(1), 6.4(0.65), 4.93(0.3),
Help on Forms: Forms:

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

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Baur W H , Neues Jahrbuch fur Mineralogie, Monatshefte , 1969 (1969) p.430-433, The crystal structure of paravauxite, Fe2+Al2(PO4)2(OH)2(OH2)6*2H2O

 

Physical Properties of Paravauxite

Help on Cleavage: Cleavage: {010} Perfect
Help on Color: Color: Colorless, Greenish white, Light greenish white.
Help on Density: Density: 2.36
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: white
 

Optical Properties of Paravauxite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.018 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.018 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2377,KPDmeas= 0.2377,KC= 0.2421
Ncalc = 1.57
Help on Optical Data: Optical Data: Biaxial (+), a=1.552, b=1.559, g=1.572, bire=0.0200, 2V(Calc)=74, 2V(Meas)=72.
 

Calculated Properties of Paravauxite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.41 gm/cc
note: Specific Gravity of Paravauxite =2.36 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0027724234
Boson Index = 0.9972275766
Help on Photoelectric: Photoelectric: PEParavauxite = 4.37 barns/electron
U=PEParavauxite x rElectron Density= 10.53 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Paravauxite is Not Radioactive
 

Paravauxite Classification
Help on Dana Class: Dana Class: 42.11.14.02 (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 Paravauxite 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 Paravauxite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - MinMax(Deutsch)
12 - MinMax(English)
13 - Mineralienatlas (Deutsch)
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - WWW-MINCRYST

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Paravauxite

Fe++Al2(PO4)2(OH)2•8(H2O)
Dana No: 42.11.14.02 Strunz No: 08.DC.30
Locality:

 

Notes: