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Yvonite

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About YvoniteHide

Klaus Yvon
Formula:
Cu(HAsO4) · 2H2O
Colour:
Turquoise-blue
Lustre:
Vitreous
Hardness:
3½ - 4
Specific Gravity:
3.20
Crystal System:
Triclinic
Member of:
Name:
Named after Klaus Yvon (b. 1943), Professor of Crystallography at the University of Geneva, Switzerland.

Classification of YvoniteHide

Approved
Approval Year:
1995
First Published:
1998
8.CB.25

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
B : With only medium-sized cations, RO4:H2O = 1:1

Physical Properties of YvoniteHide

Vitreous
Transparency:
Transparent
Colour:
Turquoise-blue
Hardness:
3½ - 4 on Mohs scale
Cleavage:
Perfect
On {100}, perfect; on {010}, poor.
Fracture:
Irregular/Uneven
Density:
3.20 g/cm3 (Measured)    3.22 g/cm3 (Calculated)

Optical Data of YvoniteHide

Type:
Biaxial (-)
RI values:
nα = 1.615 nβ = 1.660 nγ = 1.700
2V:
Measured: 82° , Calculated: 84°
Max Birefringence:
δ = 0.085
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v medium
Pleochroism:
Weak
Comments:
X = light blue to colorless; Y = light blue; Z = blue.

Chemical Properties of YvoniteHide

Formula:
Cu(HAsO4) · 2H2O
IMA Formula:
Cu(AsO3OH) · 2H2O

Crystallography of YvoniteHide

Crystal System:
Triclinic
Cell Parameters:
a = 7.632 Å, b = 11.168 Å, c = 6.020 Å
α = 89.32°, β = 86.55°, γ = 74.43°
Ratio:
a:b:c = 0.683 : 1 : 0.539
Unit Cell V:
493.38 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Elongated along [001], flattened on {010}, with prominent {100} and {010}. Small crystals also exhibit minor {hkl} and {001} forms.
Twinning:
Multiple laminae, with composition plane {010}, twin axis ⊥ {010}.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.35 (100)
5.239 (50)
4.40 (60)
3.936 (60)
3.302 (40)
3.008 (50)
2.840 (35)

Type Occurrence of YvoniteHide

General Appearance of Type Material:
Aggregates or radiated spherule to 1mm.
Place of Conservation of Type Material:
Natural History Museum, Geneva University, Geneva, Switzerland, 450/33.
Associated Minerals at Type Locality:

Synonyms of YvoniteHide

Other Language Names for YvoniteHide

German:Yvonit
Russian:Ивонит
Spanish:Yvonita

Relationship of Yvonite to other SpeciesHide

Member of:
Other Members of this group:
KrautiteMn(HAsO4) · H2OMon. 2 : P21

Common AssociatesHide

Associated Minerals Based on Photo Data:
Geminite22 photos of Yvonite associated with Geminite on mindat.org.
Pushcharovskite14 photos of Yvonite associated with Pushcharovskite on mindat.org.
Bismuth10 photos of Yvonite associated with Bismuth on mindat.org.
Arsenopyrite3 photos of Yvonite associated with Arsenopyrite on mindat.org.
Arsenolite1 photo of Yvonite associated with Arsenolite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.CB.05SerrabrancaiteMnPO4 · H2OMon. 2/m : B2/b
8.CB.10Hureaulite(Mn,Fe)5(PO4)2(HPO4)2 · 4H2OMon. 2/m : B2/b
8.CB.10SainfelditeCa5(AsO4)2(AsO3OH)2 · 4H2OMon. 2/m : B2/b
8.CB.10VillyaelleniteMnMn2Ca2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b
8.CB.10UM1997-09-AsO:CaHMgZn(Mg,Ca,Zn)5(AsO4)2(HAsO4)2 · 4H2OMon.
8.CB.10NyholmiteCd3Zn2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b
8.CB.10MiguelromeroiteMnMn2Mn2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b
8.CB.15FluckiteCaMn2+(HAsO4)2 · 2H2OTric. 1 : P1
8.CB.15KrautiteMn(HAsO4) · H2OMon. 2 : P21
8.CB.20Cobaltkoritnigite(Co,Zn)(HAsO4) · H2OTric. 1 : P1
8.CB.20KoritnigiteZn(HAsO4) · H2OTric. 1 : P1
8.CB.30GeminiteCu(HAsO4) · H2OTric.
8.CB.35SchubneliteFe3+VO4 · H2OTric.
8.CB.40RadovaniteCu2Fe3+(AsO4)(HAs3+O3)2 · H2OOrth. mmm (2/m 2/m 2/m) : Pnma
8.CB.45KazakhstaniteFe3+5V4+3V5+12O39(OH)9 · 9H2OMon.
8.CB.50KolovratiteNixZny(VO4)0.67(x+y) · nH2O
8.CB.55IrhtemiteCa4Mg(AsO4)2(HAsO4)2 · 4H2OMon.
8.CB.60BurgessiteCo2(H2O)4[AsO3(OH)]2(H2O)Mon. 2/m

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for YvoniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Sarp, H., Černý, R. (1998) Description and crystal structure of Yvonite, Cu(AsO3OH).2H2O. American Mineralogist: 83: 383-389.
Mineralogical Record: 29: 479.

Internet Links for YvoniteHide

Localities for YvoniteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Czech Republic
 
  • Karlovy Vary Region
    • Krušné Hory Mts (Erzgebirge)
      • Jáchymov District (St Joachimsthal)
M.E. Ciriotti - 04.06.2008 - Probed
France (TL)
 
  • Occitanie
    • Aude
      • Salsigne
[Amer.Min.(1998) 83, 383-389]
  • Provence-Alpes-Côte d'Azur
    • Var
      • Le Pradet
[AmMin 84:197]
Namibia
 
  • Oshikoto Region (Otjikoto Region)
    • Tsumeb
Bezing, L. von., Bode, R., and Jahn, S., (2016) Namibia Minerals and Localities II. Edition Krüger-Stiftung, Bode Verlag GmbH, Salzhemmendorf, Germany, 634 pg (in English)
Mineral and/or Locality  
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