Schubnelite Mineral Data

Schubnelite Mineral Data
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General Schubnelite Information

Help on Chemical Formula: Chemical Formula: Fe++(V+++++O4)(H2O)
Help on Composition: Composition: Molecular Weight = 188.80 gm
   Vanadium  26.98 %  V    48.17 % V2O5
   Iron      29.58 %  Fe   42.29 % Fe2O3
   Hydrogen   1.07 %  H     9.54 % H2O
   Oxygen    42.37 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe3+VO4•(H2O)
Help on Environment: Environment: On sandstone.
Help on IMA Status: IMA Status: Approved IMA 1970
Help on Locality: Locality: Mounana, Gabon. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Henri J. Schubnel (1935-), French mineralogist.
Help on Name Pronunciation: Name Pronunciation: Schubnelite + Pronunciation Say SCHUBNELITE
Help on Synonym: Synonym: ICSD 87710
  PDF 24-542
 

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Schubnelite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.2136:1:1.2191
Help on Cell Dimensions: Cell Dimensions: a = 6.59, b = 5.43, c = 6.62, Z = 2; alpha = 125°, beta = 104°, gamma = 84.717° V = 187.48 Den(Calc)= 3.34
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): 3.21(1), 4.47(1), 5.15(0.8),
Click Here for Large Schubnelite Structure Window Crystal Structure:

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Schindler M , Hawthorne F C , American Mineralogist , 84 (1999) p.665-668, Schubnelite, [Fe(VO4)(H2O)], a novel heteropolyhedral framework mineral

 

Physical Properties of Schubnelite

Help on Color: Color: Black, Yellowish, Greenish brown.
Help on Density: Density: 3.28
Help on Diaphaneity: Diaphaneity: Transparent to Subopaque
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Luster: Luster: Adamantine
Help on Streak: Streak: brown
 

Optical Properties of Schubnelite

Help on Optical Data: Optical Data: Biaxial (?)
  NCalc= 2.1 - from Gladstone-Dale relationship (KC = 0.3294) where Ncalc=Dcalc*KC+1
NCalc= 2.08 - from Gladstone-Dale relationship (KC = 0.3294) where Ncalc=Dmeas*KC+1
Help on Pleochroism (x): Pleochroism (x): yellowish brown, orangish brown, or greenish brown.
Help on RL Pleochroism: RL Pleochroism: Observed.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Schubnelite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 420 nm   19.50   17.30 
   
 440 nm   18.40   15.80 
 460 nm   17.70   15.10 
 480 nm   17.30   14.70 
 500 nm   16.30   14.30 
 520 nm   16.30   13.80 
 540 nm   15.80   13.40 
 560 nm   15.60   13.20 
 580 nm   15.50   13.20 
 600 nm   15.60   13.00 
 620 nm   15.00   12.60 
 640 nm   14.90   12.60 
Calculated Relative Intensity Colors of Schubnelite in Air
Relative
Intensity		    0%   70% 100% 140% 210% 280% 350% 420% 490% 560% 630% 660%
R1                        
R2                        
 

Calculated Properties of Schubnelite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.22 gm/cc
note: Specific Gravity of Schubnelite =3.34 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0071504302
Boson Index = 0.9928495698
Help on Photoelectric: Photoelectric: PESchubnelite = 14.11 barns/electron
U=PESchubnelite x rElectron Density= 45.42 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Schubnelite is Not Radioactive
 

Schubnelite Classification
Help on Dana Class: Dana Class: 47.03.03.01 (47)Vanadium Oxysalts
  (47.03)(Hydrated)
  (47.03.03)Dana Group
 
47.03.03.01 Schubnelite Fe(VO4)(H2O) P1 1
Help on Strunz Class: Strunz Class: 08.CB.35 08 - PHOSPHATES, ARSENATES, VANADATES
  08.C - Phosphates without Additional Anions, with H2O
  08.CB -With only medium-sized cations, RO4:H2O = 1:1
 
08.CB.35 Schubnelite Fe(VO4)(H2O) P1 1
 

Other Schubnelite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Schubnelite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info

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Schubnelite

Fe++(V+++++O4)(H2O)
Dana No: 47.03.03.01 Strunz No: 08.CB.35
Locality:

 

Notes: