Yvonite Mineral Data

Yvonite Mineral Data +

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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.

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 - PinacoidalH-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),

Crystal Structure:

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Sarp H , Cerny R , American Mineralogist , 83 (1998) p.383-389, Description and crystal structure of Yvonite, Cu(AsO3OH)2H2O

Physical Properties of Yvonite

Cleavage:

[100] Perfect, [010] Poor

Color:

Turquoise blue.

Density:

3.2

Diaphaniety:

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

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:

r_electron=3.09 gm/cc
note: r_Yvonite=3.22 gm/cc.

Fermion Index

Fermion Index = 0.00019
Boson Index = 0.99981

Photoelectric:

PE_Yvonite= 32.79 barns/electron
U=PE_Yvonite x r_electron= 101.39 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Yvonite is Not Radioactive

Yvonite Classification

Dana Class:

39.1.10.1 (39)Hydrated Acid Phosphates, etc

(39.1)A+ [HXO4] · x(H2O)

(39.1.10)Dana Group

39.1.10.1 Yvonite ! Cu(AsO3OH)·2(H2O) P1 1

Strunz Class:

VII/C.06-35 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.06 - Cobaltkoritnigite - Geigerite series

VII/C.06-10 Cobaltkoritnigite (Co,Zn)(AsO3OH)·(H2O) P1 1

VII/C.06-20 Koritnigite ZnHAsO4·(H2O) P1 1

VII/C.06-30 Geminite Cu2As2O7·3(H2O) P1 or P1 Tri

VII/C.06-32 Pushcharovskite! Cu(AsO3OH)·1.5(H2O) P1 or P1 Tri

VII/C.06-35 Yvonite Cu(AsO3OH)·2(H2O) P1 1

VII/C.06-37 Rollandite! Cu3(AsO4)2·4(H2O) P nma 2/m 2/m 2/m

VII/C.06-40 Chudobaite (Mg,Zn)5(AsO3OH)2(AsO4)2·10(H2O) P1 1

VII/C.06-50 Lindackerite CuCu4(AsO4)2(AsO3OH)2·~9(H2O) P1 1

VII/C.06-60 Geigerite Mn5(AsO3OH)2(AsO4)2·10(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 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 - WWW-MINCRYST

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Yvonite

Cu(AsO3OH)·2(H2O)
Dana No: 39.1.10.1 Strunz No: VII/C.06-35
Locality:

Notes: