Mineralogy Database

Schoderite Mineral Data

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General Schoderite Information

Help on Chemical  Formula: Chemical Formula: Al2(PO4)(VO4)•8(H2O)
Help on Composition: Composition: Molecular Weight = 408.00 gm
   Aluminum    13.23 %  Al   24.99 % Al2O3
   Vanadium    12.49 %  V    22.29 % V2O5
   Phosphorus   7.59 %  P    17.40 % P2O5
   Hydrogen     3.95 %  H    35.32 % H2O
   Oxygen      62.74 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Al2(PO4)(VO4)•8(H2O)
Help on IMA Status: IMA Status: Approved IMA 1962
Help on Locality: Locality: Fish Creek Range, near Eureka, Nevada, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for William P. Schoder (1900-1977), U. S. Chemist.
Help on Name Pronunciation: Name Pronunciation: Schoderite + Pronunciation Say SCHODERITE

Schoderite Image

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Comments: Sub-mm coatings of yellow to deep orange Schoderite on matrix.
Location: Fish Creek Range, Eureka County, Nevada, USA. Scale: Picture size 2 cm.
© John Veevaert

Schoderite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5313:1:0.4101
Help on Cell Dimensions: Cell Dimensions: a = 16.26, b = 30.6, c = 12.55, Z = 18; beta = 91.77° V = 6,241.35 Den(Calc)= 1.95
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 16.33(1), 15.34(0.7), 7.64(0.35),

Physical Properties of Schoderite

Help on Cleavage: Cleavage: {010} Good
Help on Color: Color: Yellow, Orange.
Help on Density: Density: 1.88
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 2 - Gypsum
Help on Streak: Streak: yellow

Optical Properties of Schoderite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.071 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.033 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2885,KPDmeas= 0.2993,KC= 0.2795
Ncalc = 1.53 - 1.54
Help on Optical Data: Optical Data: Biaxial (-), a=1.56, b=1.563, g=1.565, bire=0.0050, 2V(Calc)=78, 2V(Meas)=43.

Calculated Properties of Schoderite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.99 gm/cc
note: Specific Gravity of Schoderite =1.95 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0006192422
Boson Index = 0.9993807578
Help on Photoelectric: Photoelectric: PESchoderite = 3.11 barns/electron
U=PESchoderite x rElectron Density= 6.18 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Schoderite is Not Radioactive

Schoderite Classification

Help on  Dana Class: Dana Class: (43)Compound Phosphates, etc.
  (43.03)(Hydrated Normal Compound Anions)
  (43.03.01)Embreyite Group Schoderite Al2(PO4)(VO4)•8(H2O) P 21/m 2/m Metaschoderite Al2(PO4)(VO4)•6(H2O) P 2/m 2/m
Help on  Strunz Class: Strunz Class: 08.CE.70 08 - PHOSPHATES, ARSENATES, VANADATES
  08.C - Phosphates without Additional Anions, with H2O
  08.CE -With only medium-sized cations, RO4:H2O � 1:2.5
08.CE.70 Metaschoderite Al2(PO4)(VO4)•6(H2O) P 2/m 2/m
08.CE.70 Schoderite Al2(PO4)(VO4)•8(H2O) P 21/m 2/m

Other Schoderite 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 Schoderite :
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 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Dana No: Strunz No: 08.CE.70





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