Wheatleyite Mineral Data

Wheatleyite Mineral Data +

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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)

IMA Status:

Approved IMA 1986

Locality:

Link to MinDat.org Location Data.

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),

Physical Properties of Wheatleyite

Cleavage:

[100] Perfect

Color:

Blue.

Density:

2.27

Diaphaniety:

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= -0.961 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2289,KPDmeas= 0.23,KC= 0.1168

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:

r_electron=2.25 gm/cc
note: r_Wheatleyite=2.28 gm/cc.

Fermion Index

Fermion Index = 0.00188
Boson Index = 0.99812

Photoelectric:

PE_Wheatleyite= 8.83 barns/electron
U=PE_Wheatleyite x r_electron= 19.90 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Wheatleyite is Not Radioactive

Wheatleyite Classification

Dana Class:

50.1.8.1 (50)Salts of Organic Acids

(50.1)(Oxalates)

(50.1.8)Dana Group

50.1.8.1 Wheatleyite Na2Cu(C2O4)2·2(H2O) P1 1

Strunz Class:

IX/A.01-100 IX - Organic compunds

IX/A - Oxalates. Salts from organic acids. [C2O4]2- arranged after increasing cation size

IX/A.01 - Whewellite - Wheatleyite series

IX/A.01-05 Natroxalate! Na2C2O4 P 2₁/a 2/m

IX/A.01-10 Whewellite Ca(C2O4)·(H2O) P 2₁/n 2/m

IX/A.01-20 Weddellite Ca(C2O4)·2(H2O) I 4/m 4/m

IX/A.01-25 Caoxite! Ca(C2O4)·3(H2O) P1 1

IX/A.01-28 Novgorodovaite! Ca2(C2O4)Cl2·2(H2O) I2/m 2/m

IX/A.01-30 Oxammite (NH4)2(C2O4)·(H2O) P 2₁2₁2 2 2 2

IX/A.01-40 Glushinskite Mg(C2O4)·2(H2O) C 2/c 2/m

IX/A.01-50 Humboldtine Fe(C2O4)·2(H2O) I2/a 2/m

IX/A.01-55 Lindbergite! Mn(C2O4)·2(H2O) C 2/c 2/m

IX/A.01-60 Minguzzite K3Fe(C2O4)3·3(H2O) P 2₁/c 2/m

IX/A.01-70 Zhemchuzhnikovite NaMg(Al,Fe)(C2O4)3·8(H2O) Unk Trig

IX/A.01-80 Stepanovite NaMgFe(C2O4)3·8-9(H2O) Unk Trig

IX/A.01-90 Moolooite Cu(C2O4)·n(H2O)(n<1) Unk Ortho

IX/A.01-100 Wheatleyite Na2Cu(C2O4)2·2(H2O) P1 1

IX/A.01-110 Coskrenite-(Ce)! (Ce,Nd,La)2(SO4)2(C2O4)·8(H2O) C 2/c 2/m

IX/A.01-120 Levinsonite-(Y)! (Y,Nd,La)Al(SO4)2(C2O4)·12(H2O) P 2/n 2/m

IX/A.01-130 Zugshunstite-(Ce)! (Ce,Nd,La)Al(SO4)2(C2O4)·8(H2O) C 2/c 2/m

Other Wheatleyite 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 Wheatleyite :
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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Wheatleyite

Na2Cu(C2O4)2·2(H2O)
Dana No: 50.1.8.1 Strunz No: IX/A.01-100
Locality:

Notes: