Yvonite Mineral Data

General Yvonite Information

Chemical Formula:

Cu(AsO3OH)•2(H2O)

Composition:

Molecular Weight = 239.50 gm

Copper 26.53 % Cu 33.21 % CuO

Arsenic 31.28 % As 47.98 % As₂O₅

Hydrogen 2.10 % H 18.80 % H₂O

Oxygen 40.08 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Cu(AsO₃OH)•2(H₂O)

Environment:

Gold-bearing sulfo-arsenic ore.

IMA Status:

Approved IMA 1998 (Dana # Added)

Locality:

Salsigne mine near Carcassone, Aude, France. Link to MinDat.org Location Data.

Name Origin:

Named in honor of Klaus Yvon, professor of crystallography at the University of Geneva, Switzerland.

Name Pronunciation:

Yvonite

Synonym:

ICSD 85540

IMA1995-012

Yvonite Image

Images:

Yvonite

Comments: Bluish green or turquoise-colored microcrystals of yvonite on metallic matrix of arsenopyrite & native bismuth.
Location: Salsigne mine, Carcassone, Aude, France. Scale: 2 cm.
© John Attard

Yvonite Crystallography

Axial Ratios:

a:b:c =0.6833:1:0.539

Cell Dimensions:

a = 7.632, b = 11.168, c = 6.02, Z = 4; alpha = 89.317°, beta = 86.55°, gamma = 74.733° V = 494.07 Den(Calc)= 3.22

Crystal System:

Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 7.35(1), 3.936(0.6), 4.44(0.6),

Physical Properties of Yvonite

Cleavage:

{100} Perfect, {010} Poor

Color:

Turquoise blue.

Density:

3.2

Diaphaneity:

Transparent

Fracture:

Brittle - Irregular - Very brittle fracture producing irregular fragments

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Habit:

Spherical - Spherical, rounded aggregates.

Hardness:

3.5-4 - Copper Penny-Fluorite

Luminescence:

Non-fluorescent.

Luster:

Vitreous (Glassy)

Streak:

blue

Optical Properties of Yvonite

Gladstone-Dale:

CI meas= -0.038 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.032 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2045,KPDmeas= 0.2057,KC= 0.1981
Ncalc = 1.63 - 1.64

Optical Data:

Biaxial (-), a=1.615, b=1.66, g=1.7, bire=0.0850, 2V(Calc)=84, 2V(Meas)=82. Dispersion r > v medium.

Pleochroism (x):

colorless or light blue.

Pleochroism (y):

light blue.

Pleochroism (z):

blue.

Calculated Properties of Yvonite

Electron Density:

Bulk Density (Electron Density)=3.09 gm/cc
note: Specific Gravity of Yvonite =3.22 gm/cc.

Fermion Index:

Fermion Index = 0.000195547
Boson Index = 0.999804453

Photoelectric:

PE_Yvonite= 32.79 barns/electron
U=PE_Yvonite x rElectron Density= 101.39 barns/cc.

Radioactivity:

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

Yvonite Classification

Dana Class:

39.01.10.01 (39)Hydrated Acid Phosphates, etc

(39.01)A+ [HXO4] ï¿½ x(H2O)

(39.01.10)Dana Group

39.01.10.01 Yvonite! Cu(AsO3OH)•2(H2O) P1 1

Strunz Class:

08.CB.25 08 - PHOSPHATES, ARSENATES, VANADATES

08.C - Phosphates without Additional Anions, with H2O

08.CB -With only medium-sized cations, RO4:H2O = 1:1

08.CB.25 Yvonite! Cu(AsO3OH)•2(H2O) P1 1

Other Yvonite Information

References:

NAME( AmMin) PHYS. PROP.(Am.Min.,Vol.83,p383-389,1998) OPTIC PROP.(AmMin)

See Also:

Links to other databases for Yvonite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
13 - WWW-MINCRYST

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

Yvonite

Cu(AsO3OH)•2(H2O)
Dana No: 39.01.10.01 Strunz No: 08.CB.25
Locality:

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