Wheatleyite Mineral Data

General Wheatleyite Information

Chemical Formula:

Na2Cu(C2O4)2•2(H2O)

Composition:

Molecular Weight = 321.60 gm

Sodium 14.30 % Na 19.27 % Na₂O

Copper 19.76 % Cu 24.73 % CuO

Hydrogen 1.25 % H 11.20 % H₂O

Carbon 14.94 % C 44.79 % C₂O₃

Oxygen 49.75 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₂Cu(C₂O₄)₂•2(H₂O)

Environment:

Found on a specimen found on the mine dumps of a Pb-Zn vein deposit.

IMA Status:

Approved IMA 1986

Locality:

Wheatley mine, near Phoenixville, Chester Co., Pennsylvania, USA. Link to MinDat.org Location Data.

Name Origin:

Named for the localiity.

Name Pronunciation:

Wheatleyite + Pronunciation

Synonym:

ICSD 40090

PDF 39-1500

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Wheatleyite Crystallography

Axial Ratios:

a:b:c =0.7821:1:0.3713

Cell Dimensions:

a = 7.559, b = 9.665, c = 3.589, Z = 1; alpha = 76.65°, beta = 103.67°, gamma = 109.1° V = 234.25 Den(Calc)= 2.28

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 6.539(1), 3.169(0.9), 7.04(0.8),

Crystal Structure:

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Chananont P , Nixon P E , Waters J M , Water T N , Acta Crystallographica, Section B , 36 (1980) p.2145-2147, The structure of disodium catena-bis(mu-oxalato)-cuprate(II) dihydrate, Locality: synthetic

Physical Properties of Wheatleyite

Cleavage:

{100} Perfect

Color:

Blue.

Density:

2.27

Diaphaneity:

Transparent

Hardness:

1-2 - Between Talc and Gypsum

Luster:

Vitreous (Glassy)

Streak:

light blue

Optical Properties of Wheatleyite

Gladstone-Dale:

CI meas= -0.969 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.987 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.232,KPDmeas= 0.23,KC= 0.1168
Ncalc = 1.26 - 1.27

Optical Data:

Biaxial (+), a=1.4, b=1.499, g=1.667, bire=0.2670, 2V(Calc)=84, 2V(Meas)=83.

Calculated Properties of Wheatleyite

Electron Density:

Bulk Density (Electron Density)=2.24 gm/cc
note: Specific Gravity of Wheatleyite =2.27 gm/cc.

Fermion Index:

Fermion Index = 0.0018840011
Boson Index = 0.9981159989

Photoelectric:

PE_Wheatleyite= 8.83 barns/electron
U=PE_Wheatleyite x rElectron Density= 19.82 barns/cc.

Radioactivity:

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

Wheatleyite Classification

Dana Class:

50.01.08.01 (50)Salts of Organic Acids

(50.01)(Oxalates)

(50.01.08)Dana Group

50.01.08.01 Wheatleyite Na2Cu(C2O4)2•2(H2O) P1 1

Strunz Class:

10.AB.30 10 - ORGANIC COMPOUNDS

10.A - Salts of Organic Acids

10.AB -Oxalates

10.AB.30 Wheatleyite Na2Cu(C2O4)2•2(H2O) P1 1

Other Wheatleyite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Wheatleyite :
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 Wheatleyite Specimen Label here :

Wheatleyite

Na2Cu(C2O4)2•2(H2O)
Dana No: 50.01.08.01 Strunz No: 10.AB.30
Locality:

Notes: