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Arhbarite

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Formula:
Cu2Mg(AsO4)(OH)3
Colour:
Dark blue to medium blue
Lustre:
Sub-Vitreous, Waxy
Crystal System:
Triclinic
Name:
Named by K. Schmetzer, Gerd Tremmel, and Olaf Medenbach in 1982 after the type locality, the Arhbar mine, Bou Azzer, Morocco.
This page provides mineralogical data about Arhbarite.


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Classification of ArhbariteHide

Approved
8.BE.25

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
E : With only medium-sized cations, (OH, etc.):RO4 > 2:1
42.6.5.2

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
6 : A2(XO4)Zq·xH2O
20.1.10

20 : Arsenates (also arsenates with phosphate, but without other anions)
1 : Arsenates of Cu

Physical Properties of ArhbariteHide

Sub-Vitreous, Waxy
Transparency:
Translucent
Colour:
Dark blue to medium blue
Streak:
Light blue - sky-blue
Tenacity:
Brittle
Cleavage:
None Observed

Optical Data of ArhbariteHide

Type:
Biaxial
RI values:
nα = 1.720 nγ = 1.740
2V:
Measured: 90°
Birefringence:
0.020
Max Birefringence:
δ = 0.020
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
relatively strong
Optical Extinction:
45° to fiber axis
Pleochroism:
Visible
Comments:
X' turquoise-blue, Z' dark turquoise-blue

Chemical Properties of ArhbariteHide

Formula:
Cu2Mg(AsO4)(OH)3
IMA Formula:
Cu2MgAsO4(OH)3

Crystallography of ArhbariteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pedial
Space Group:
P1
Setting:
P1
Cell Parameters:
a = 5.315 Å, b = 5.978 Å, c = 5.03 Å
α = 113.58°, β = 97.14°, γ = 89.31°
Ratio:
a:b:c = 0.889 : 1 : 0.841
Unit Cell V:
145.21 ų (Calculated from Unit Cell)
Morphology:
Found in botryoidal clusters of tightly radially grown crystals.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.57 (100)
4.51 (90)
3.72 (60)
3.25 (40)
2.63 (40)
2.60 (50)
2.47 (50)
Comments:
ICDD 35-562

Type Occurrence of ArhbariteHide

Other Language Names for ArhbariteHide

German:Arhbarit
Spanish:Arhbarita

Common AssociatesHide

BrochantiteCu4(SO4)(OH)6
ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
DolomiteCaMg(CO3)2
IodargyriteAgI
OliveniteCu2(AsO4)(OH)
Associated Minerals Based on Photo Data:
Conichalcite27 photos of Arhbarite associated with Conichalcite on mindat.org.
Guanacoite13 photos of Arhbarite associated with Guanacoite on mindat.org.
Gilmarite12 photos of Arhbarite associated with Gilmarite on mindat.org.
Enargite4 photos of Arhbarite associated with Enargite on mindat.org.
Quartz1 photo of Arhbarite associated with Quartz on mindat.org.
Dolomite1 photo of Arhbarite associated with Dolomite on mindat.org.
Malachite1 photo of Arhbarite associated with Malachite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.BE.05AugeliteAl2(PO4)(OH)3Mon. 2/m : B2/m
8.BE.10GrattarolaiteFe3+3(PO4)O3Trig. 3m : R3m
8.BE.15CornetiteCu3(PO4)(OH)3Orth. mmm (2/m 2/m 2/m) : Pbca
8.BE.20ClinoclaseCu3(AsO4)(OH)3Mon. 2/m : P21/b
8.BE.25GilmariteCu3(AsO4)(OH)3Tric.
8.BE.30AllactiteMn2+7(AsO4)2(OH)8Mon. 2/m : P21/b
8.BE.30FlinkiteMn2+2Mn3+(AsO4)(OH)4Orth.
8.BE.30RaadeiteMg7(PO4)2(OH)8Mon. 2/m
8.BE.30ArganditeMn7(VO4)2(OH)8Mon. 2/m : P21/m
8.BE.35Chlorophoenicite(Mn,Mg)3Zn2(AsO4)(OH,O)6Mon. 2/m : B2/m
8.BE.35Magnesiochlorophoenicite(Mg,Mn)3Zn2(AsO4)(OH,O)6Mon. 2/m : B2/m
8.BE.40Gerdtremmelite(Zn,Fe)(Al,Fe)2(AsO4)(OH)5Tric.
8.BE.45DixeniteCuMn2+14Fe2+(SiO4)2(As5+O4)(As3+O3)5(OH)6Trig.
8.BE.45Hematolite(Mn,Mg,Al,Fe3+)15(As5+O4)2(As3+O3)(OH)23Trig. 3 : R3
8.BE.45KraissliteZn3(Mn,Mg)25(Fe3+,Al)(As3+O3)2[(Si,As5+)O4]10(OH)16Orth. 2 2 2 : C2 2 21
8.BE.45McgoverniteMn19Zn3(AsO4)3(AsO3)(SiO4)3(OH)21Trig. 3m (3 2/m)
8.BE.45Arakiite(Zn,Mn2+)(Mn2+,Mg)12(Fe3+,Al)2(As5+O4)2(As3+O3)(OH)23Mon.
8.BE.45Turtmannite(Mn,Mg)22.5Mg3-3x((V5+,As5+)O4)3(As3+O3)x(SiO4)3O5-5x(OH)20+xTrig.
8.BE.45CarlfrancisiteMn2+3(Mn2+,Mg,Fe3+,Al)42[As3+O3]2(As5+O4)4[(Si,As5+)O4]6[(As5+,Si)O4]2(OH)42 Trig. 3m (3 2/m) : R3c
8.BE.50SynadelphiteMn2+9(As5+O4)2(As3+O3)(OH)9 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pnma
8.BE.55Holdenite(Mn2+,Mg)6Zn3(AsO4)2(SiO4)(OH)8Orth. mmm (2/m 2/m 2/m) : Ccca
8.BE.60KoliciteMn2+7Zn4(AsO4)2(SiO4)2(OH)8Orth. mmm (2/m 2/m 2/m) : Cmca
8.BE.65Sabelliite(Cu,Zn)2Zn(AsO4,SbO4)(OH)3Trig. 3 : P3
8.BE.70JarosewichiteMn2+3Mn3+(AsO4)(OH)6Orth. 2 2 2
8.BE.75TheisiteCu5Zn5(AsO4,SbO4)2(OH)14Orth.
8.BE.80CoparsiteCu4(AsO4,VO4)O2ClOrth.
8.BE.85WaterhouseiteMn2+7(PO4)2(OH)8Mon. 2/m : P21/b

Related Minerals - Dana Grouping (8th Ed.)Hide

42.6.5.1StrashimiriteCu8(AsO4)4(OH)4 · 5H2OMon.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

20.1.1LammeriteCu3(AsO4)2Mon.
20.1.2OliveniteCu2(AsO4)(OH)Mon. 2/m : P21/m
20.1.3ClinoclaseCu3(AsO4)(OH)3Mon. 2/m : P21/b
20.1.4CornwalliteCu5(AsO4)2(OH)4Mon. 2/m : P21/b
20.1.5CornubiteCu5(AsO4)2(OH)4Tric. 1 : P1
20.1.6Chlorotile (of Frenzel)
20.1.7GeminiteCu(HAsO4) · H2OTric.
20.1.8EuchroiteCu2(AsO4)(OH) · 3H2OOrth. 2 2 2 : P21 21 21
20.1.9StrashimiriteCu8(AsO4)4(OH)4 · 5H2OMon.
20.1.11LindackeriteCuCu4(AsO4)2(HAsO4)2 · 9H2OTric. 1 : P1
20.1.12ConichalciteCaCu(AsO4)(OH)Orth. 2 2 2 : P21 21 21
20.1.13LiroconiteCu2Al(AsO4)(OH)4 · 4H2OMon. 2/m
20.1.14CeruleiteCu2Al7(AsO4)4(OH)13 · 11.5H2OTric.
20.1.15ChenevixiteCu2Fe3+2(AsO4)2(OH)4Mon. 2/m : P21/m
20.1.16ArthuriteCuFe3+2(AsO4)2(OH)2 · 4H2OMon.

Fluorescence of ArhbariteHide

Not Fluorescent

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 ArhbariteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Schmetzer, K., Tremmel, G., Medenbach, O. (1982) Arhbarit, Cu2[OH|AsO4]•6H2O, ein neues Mineral von Bou-Azzer, Marokko. Neues Jahrbuch für Mineralogie, Monatshefte: 1982: 529-533.
Dunn, P.J., Grice, J.D., Fleischer, M., Pabst, A. (1983) New mineral names. American Mineralogist: 68: 1038-1041.
Grice, J.D., Ferraris, G. (2003) New minerals approved in 2002 and nomenclature modifications approved in 1998-2002 by the Commission on the New Minerals and Mineral Names, International Mineralogical Association. The Canadian Mineralogist: 41: 795-802.
Krause, W., Bernhardt, H.-J., Effenberger, H., Kolitsch, U., Lengauer, C. (2003) Redefinition of arhbarite, Cu2Mg(AsO4)(OH)3. Mineralogical Magazine: 67: 1099-1107.
Jambor, J.L., Roberts, A.C. (2004) New mineral names. American Mineralogist: 89: 894-897.

Internet Links for ArhbariteHide

Localities for ArhbariteHide

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.
Chile
 
  • Antofagasta Region
    • Antofagasta Province
      • Santa Catalina
Färber, G., Witzke, T., Neumeier, G. and Weiß, S. (1998): Die besten Stufen des seltenen Kupferarsenates Arhbarit – ein sensationeller Neufund aus Chile. Lapis 23 (10), 49-51 (in German) ; W. Krause, H.-J. Bernhardt, H. Effenberger, U. Kolitsch and C. Lengauer (2003): Redefinition of arhbarite, Cu2Mg(AsO4)(OH)3. Mineralogical Magazine 67, 1099-1107
No reference listed
Morocco (TL)
 
  • Drâa-Tafilalet Region
    • Ouarzazate Province
      • Tazenakht
        • Bou Azzer District (Bou Azer District)
          • Aghbar
Schmetzer, K., Tremmel, G. and Medenbach, O. (1982): Arhbarit, Cu2[OH|AsO4]•6H2O, ein neues Mineral von Bou-Azzer, Marokko. Neues Jahrbuch für Mineralogie, Monatshefte 1982, 529-533; Krause, W., H.-J. Bernhardt, H. Effenberger, U. Kolitsch and C. Lengauer (2003): Redefinition of arhbarite, Cu2Mg(AsO4)(OH)3. Mineralogical Magazine: 67, 1099-1107.
Mineral and/or Locality  
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