Juangodoyite Mineral Data

General Juangodoyite Information

Chemical Formula:

Na2Cu(CO3)2

Composition:

Molecular Weight = 229.51 gm

Sodium 20.83 % Na 28.08 % Na₂O

Copper 27.13 % Cu 33.97 % CuO

Carbon 10.41 % C 38.16 % CO₂

Oxygen 41.62 % O

______ ______

100.00 % 100.21 % = TOTAL OXIDE

Empirical Formula:

Na_2.08Cu_0.98(CO₃)_1.99

Environment:

Fine-grained pseudomorph after chalconatronite in the oxidation zone of the Santa Rosa mine,

IMA Status:

Approved IMA 2004 (Dana # Added)

Locality:

Mina Santa Rosa, Iquique, Atamaca desert, Chile Link to MinDat.org Location Data.

Name Origin:

Named for Juan Godoy, who discovered the Chaï¿½arcillo silver mine in 1832.

Synonym:

IMA2004-036

Juangodoyite Image

Images:

Juangodoyite

Comments: Rich blue veinlets of juangodoyite in matrix..
Location: Mina Santa Rosa, Iquique, Chile. Scale: 3.5x2.9x2.2 cm.
© Richard Dale / Dale Minerals

Images:

Sanromanite Juangodoyite Chalconatronite

Comments: Yellowish, long balded sanromanite crystals in vug with platy, blue juangodoyite replacing green chalconatronite.
Location: Santa Rosa mine, Iquique Province, Tarapaca, Chile. Scale: Picture size 3 mm.
© Tom Loomis / Dakota Matrix

Juangodoyite Crystallography

Axial Ratios:

a:b:c =0.7552:1:0.6908

Cell Dimensions:

a = 6.171, b = 8.171, c = 5.645, Z = 2; beta = 116.23° V = 255.33 Den(Calc)= 2.99

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2₁/a

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

By Intensity(I/I_o): 2.666(1)(112), 4.258(0.75)(111), 5.056(0.66)(001 ), 2.619(0.65)(210 ), 4.575(0.57)(110 ), 4.298(0.37)(011 ), 2.45(0.33)(221), 2.907(0.32)(111 ), 2.39(0.25)(131

Physical Properties of Juangodoyite

Color:

Bright blue.

Habit:

Pseudomorphous - Occurs in the form of another mineral.

Luster:

Earthy (Dull)

Streak:

blue

Optical Properties of Juangodoyite

Optical Data:

NCalc= 1.57 - from Gladstone-Dale relationship (KC = 0.1916) where Ncalc=Dcalc*KC+1

Calculated Properties of Juangodoyite

Electron Density:

Bulk Density (Electron Density)=2.89 gm/cc
note: Specific Gravity of Juangodoyite =2.99 gm/cc.

Fermion Index:

Fermion Index = 0.0013453263
Boson Index = 0.9986546737

Photoelectric:

PE_Juangodoyite= 12.27 barns/electron
U=PE_Juangodoyite x rElectron Density= 35.49 barns/cc.

Radioactivity:

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

Juangodoyite Classification

Dana Class:

14.03.06.01 (14)Anhydrous Carbonates

(14.03)with Compound Formula A+2 B++ (CO3)2

(14.03.06)Dana Group

14.03.06.01 Juangodoyite! Na2Cu(CO3)2 P 2₁/a 2/m

Strunz Class:

05.AB.60 05 - CARBONATES (NITRATES)

05.A - Carbonates without additional anions, without H2O

05.AB -Alkali-earth (and other M2+) carbonates

05.AB.60 Juangodoyite! Na2Cu(CO3)2 P 2₁/a 2/m

Other Juangodoyite Information

References:

NAME( AmMin, v91, p1204) PHYS. PROP.(AmMin, v91, p1204)

See Also:

Links to other databases for Juangodoyite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Juangodoyite

Na2Cu(CO3)2
Dana No: 14.03.06.01 Strunz No: 05.AB.60
Locality:

Notes:

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