Metaschoderite Mineral Data

Metaschoderite Mineral Data +

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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)

IMA Status:

Approved IMA 1962

Locality:

Link to MinDat.org Location Data.

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

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:

r_electron=1.90 gm/cc
note: r_{Metaschoderite}=1.88 gm/cc.

Fermion Index

Fermion Index = 0.00063
Boson Index = 0.99937

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Metaschoderite is Not Radioactive

Metaschoderite Classification

Dana Class:

43.3.1.2 (43)Compound Phosphates, etc.

(43.3)(Hydrated Normal Compound Anions)

(43.3.1)Dana Group

43.3.1.1 Schoderite Al2(PO4)(VO4)·8(H2O) P 2₁/m 2/m

43.3.1.2 Metaschoderite Al2(PO4)(VO4)·6(H2O) P 2/m 2/m

Strunz Class:

VII/C.12-40 VII - Phosphates, Arsenates and Vanadates

VII/C - Water-bearing phosphates without unfamiliar anions. cations of medium and small size: Be and Mn, Fe, Cu, Zn, Mg

VII/C.12 - Newberyite - Kankite series

VII/C.12-10 Newberyite Mg(PO3OH)·3(H2O) P bca 2/m 2/m 2/m

VII/C.12-20 Steigerite AlVO4·3(H2O) P 2₁/m, P 2 Mono

VII/C.12-30 Schoderite Al2(PO4)(VO4)·8(H2O) P 2₁/m 2/m

VII/C.12-40 Metaschoderite Al2(PO4)(VO4)·6(H2O) P 2/m 2/m

VII/C.12-50 Kankite FeAsO4·3.5(H2O) Unk Mono

Other Metaschoderite Information

References:

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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Metaschoderite

Al2(PO4)(VO4)·6(H2O)
Dana No: 43.3.1.2 Strunz No: VII/C.12-40
Locality:

Notes: