Metaschoderite Mineral Data

General Metaschoderite Information

Chemical Formula:

Al2(PO4)(VO4)•6(H2O)

Composition:

Molecular Weight = 371.97 gm

Aluminum 14.51 % Al 27.41 % Al₂O₃

Vanadium 13.70 % V 24.45 % V₂O₅

Phosphorus 8.33 % P 19.08 % P₂O₅

Hydrogen 3.25 % H 29.06 % H₂O

Oxygen 60.22 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Al₂(PO₄)(VO₄)•6(H₂O)

Environment:

Dehydration product of schoderite.

IMA Status:

Approved IMA 1962

Locality:

Van-Nav-Sand claim group, Fish Creek Range, 48 km south of Eureka, Eureka Co., California and near Cockalorum Wash, Nye Co., Nevada, USA. Link to MinDat.org Location Data.

Name Origin:

Named as the dehydration product of schoderite.

Name Pronunciation:

Metaschoderite + Pronunciation

Metaschoderite Image

Images:

Metaschoderite

Comments: Orange crystalline metaschoderite crust on shale.
Location: 25 miles east of Eureka, Fish Creek Range, Eureka County, Nevada, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Metaschoderite Crystallography

Axial Ratios:

a:b:c =0.7651:1:0.6174

Cell Dimensions:

a = 11.4, b = 14.9, c = 9.2, Z = 4; beta = 101° V = 1,534.00 Den(Calc)= 1.61

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 7.5(1), 14.9(0.6), 11.1(0.4),

Physical Properties of Metaschoderite

Color:

Yellow orange.

Density:

1.88

Hardness:

2 - Gypsum

Streak:

yellow

Optical Properties of Metaschoderite

Gladstone-Dale:

CI meas= -0.185 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.383 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.3785,KPDmeas= 0.3241,KC= 0.2736
Ncalc = 1.44 - 1.51

Optical Data:

Biaxial (+), a=1.598, b=1.604, g=1.626, bire=0.0280, 2V(Calc)=56, 2V(Meas)=59.

Calculated Properties of Metaschoderite

Electron Density:

Bulk Density (Electron Density)=1.90 gm/cc
note: Specific Gravity of Metaschoderite =1.88 gm/cc.

Fermion Index:

Fermion Index = 0.0006363068
Boson Index = 0.9993636932

Photoelectric:

PE_{Metaschoderite}= 3.40 barns/electron
U=PE_{Metaschoderite} x rElectron Density= 6.47 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Metaschoderite is Not Radioactive

Metaschoderite Classification

Dana Class:

43.03.01.02 (43)Compound Phosphates, etc.

(43.03)(Hydrated Normal Compound Anions)

(43.03.01)Embreyite Group

43.03.01.01 Schoderite Al2(PO4)(VO4)•8(H2O) P 2₁/m 2/m

43.03.01.02 Metaschoderite Al2(PO4)(VO4)•6(H2O) P 2/m 2/m

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 Metaschoderite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Metaschoderite :
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

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

Metaschoderite

Al2(PO4)(VO4)•6(H2O)
Dana No: 43.03.01.02 Strunz No: 08.CE.70
Locality:

Notes: