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Arhbarite

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Formula:
Cu
 
2
Mg(AsO
 
4
)(OH)
 
3
System:TriclinicColour:Dark Blue to medium blue
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.

Classification of Arhbarite

IMA status:Approved
Strunz 8th edition ID:7/B.13-40
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID:42.6.5.2

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

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

Type Locality:Aghbar Mine (Arhbar Mine), Aghbar, Bou Azer District (Bou Azzer District), Tazenakht, Ouarzazate Province, Souss-Massa-Draâ Region, Morocco
Year of Discovery:1982
Geological Setting of type material:Hydrothermal polymetallic ore deposit
Associated Minerals at type locality:
DolomiteErythriteHematiteLöllingiteLöllingite
PharmacoliteTalc

Occurrences of Arhbarite

Geological Setting:

oxidized zone of a hydrothermal polymetallic ore deposit

Physical Properties of Arhbarite

Lustre:Sub-Vitreous, Waxy
Diaphaneity (Transparency):Translucent
Colour:Dark Blue to medium blue
Streak:Light blue - Sky blue
Tenacity:Brittle
Cleavage:None Observed

Crystallography of Arhbarite

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

Optical Data of Arhbarite

Type:Biaxial
RI values: nα = 1.720 nγ = 1.740
2V:Measured: 90°
Birefringence:0.020
Maximum Birefringence:δ = 0.020

Chart 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 Arhbarite

Formula:
Cu
 
2
Mg(AsO
 
4
)(OH)
 
3
Simplified for copy/paste:Cu2Mg(AsO4)(OH)3
Essential elements:As, Cu, H, Mg, O
All elements listed in formula:As, Cu, H, Mg, O

Relationship of Arhbarite to other Species

Common Associates:
BrochantiteChrysocollaDolomiteIodargyriteOlivenite
Related Minerals - Nickel-Strunz Grouping):

- +
8.BE.05Augelite
Al
 
2
(PO
 
4
)(OH)
 
3
8.BE.10Grattarolaite
Fe
3+
3
(PO
 
4
)O
 
3
8.BE.15Cornetite
Cu
 
3
(PO
 
4
)(OH)
 
3
8.BE.20Clinoclase
Cu
 
3
(AsO
 
4
)(OH)
 
3
8.BE.25Gilmarite
Cu
 
3
(AsO
 
4
)(OH)
 
3
8.BE.30Allactite
Mn
2+
7
(AsO
 
4
)
 
2
(OH)
 
8
8.BE.30Flinkite
Mn
2+
2
Mn
3+
 
(AsO
 
4
)(OH)
 
4
8.BE.30Raadeite
Mg
 
7
(PO
 
4
)
 
2
(OH)
 
8
8.BE.30Argandite
Mn
 
7
(VO
 
4
)
 
2
(OH)
 
8
8.BE.35Chlorophoenicite
(Mn,Mg)
 
3
Zn
 
2
(AsO
 
4
)(OH,O)
 
6
8.BE.35Magnesiochlorophoenicite
(Mg,Mn)
 
3
Zn
 
2
(AsO
 
4
)(OH,O)
 
6
8.BE.40Gerdtremmelite
(Zn,Fe)(Al,Fe)
 
2
(AsO
 
4
)(OH)
 
5
8.BE.45Dixenite
CuMn
2+
14
Fe
2+
 
(SiO
 
4
)
 
2
(As
5+
 
O
 
4
)(As
3+
 
O
 
3
)
 
5
(OH)
 
6
8.BE.45Hematolite
(Mn,Mg,Al)
 
15
(As
5+
 
O
 
4
)
 
2
(As
3+
 
O
 
3
)(OH)
 
23
8.BE.45Kraisslite
Zn
 
3
(Mn,Mg)
 
25
(Fe
3+
 
,Al)(As
3+
 
O
 
3
)
 
2
[(Si,As
5+
 
)O
 
4
]
 
10
(OH)
 
16
8.BE.45Mcgovernite
Mn
 
19
Zn
 
3
(AsO
 
4
)
 
3
(AsO
 
3
)(SiO
 
4
)
 
3
(OH)
 
21
8.BE.45Arakiite
(Zn,Mn
2+
 
)(Mn
2+
 
,Mg)
 
12
(Fe
3+
 
,Al)
 
2
(As
5+
 
O
 
4
)
 
2
(As
3+
 
O
 
3
)(OH)
 
23
8.BE.45Turtmannite
(Mn,Mg)
 
22.5
Mg
 
3-3x
((V
5+
 
,As
5+
 
)O
 
4
)
 
3
(As
3+
 
O
 
3
)
 
x
(SiO
 
4
)
 
3
O
 
5-5x
(OH)
 
20+x
8.BE.45Carlfrancisite
Mn
2+
3
(Mn
2+
 
,Mg,Fe
3+
 
,Al)
 
42
[As
3+
 
O
 
3
]
 
2
(As
5+
 
O
 
4
)
 
4
[(Si,As
5+
 
)O
 
4
]
 
6
[(As
5+
 
,Si)O
 
4
]
 
2
(OH)
 
42
8.BE.50Synadelphite
Mn
2+
9
(As
5+
 
O
 
4
)
 
2
(As
3+
 
O
 
3
)(OH)
 
9
· 2H
 
2
O
8.BE.55Holdenite
(Mn
2+
 
,Mg)
 
6
Zn
 
3
(AsO
 
4
)
 
2
(SiO
 
4
)(OH)
 
8
8.BE.60Kolicite
Mn
2+
7
Zn
 
4
(AsO
 
4
)
 
2
(SiO
 
4
)
 
2
(OH)
 
8
8.BE.65Sabelliite
(Cu,Zn)
 
2
Zn(AsO
 
4
,SbO
 
4
)(OH)
 
3
8.BE.70Jarosewichite
Mn
2+
3
Mn
3+
 
(AsO
 
4
)(OH)
 
6
8.BE.75Theisite
Cu
 
5
Zn
 
5
(AsO
 
4
,SbO
 
4
)
 
2
(OH)
 
14
8.BE.80Coparsite
Cu
 
4
(AsO
 
4
,VO
 
4
)O
 
2
Cl
8.BE.85Waterhouseite
Mn
2+
7
(PO
 
4
)
 
2
(OH)
 
8
Related Minerals - Hey's Index Grouping:

- +
20.1.1Lammerite
Cu
 
3
(AsO
 
4
)
 
2
20.1.2Olivenite
Cu
 
2
(AsO
 
4
)(OH)
20.1.3Clinoclase
Cu
 
3
(AsO
 
4
)(OH)
 
3
20.1.4Cornwallite
Cu
 
5
(AsO
 
4
)
 
2
(OH)
 
4
20.1.5Cornubite
Cu
 
5
(AsO
 
4
)
 
2
(OH)
 
4
20.1.6Chlorotile (of Frenzel)
20.1.7Geminite
Cu(HAsO
 
4
) · H
 
2
O
20.1.8Euchroite
Cu
 
2
(AsO
 
4
)(OH) · 3H
 
2
O
20.1.9Strashimirite
Cu
 
8
(AsO
 
4
)
 
4
(OH)
 
4
· 5H
 
2
O
20.1.11Lindackerite
CuCu
 
4
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
· 8-9H
 
2
O
20.1.12Conichalcite
CaCu(AsO
 
4
)(OH)
20.1.13Liroconite
Cu
 
2
Al(AsO
 
4
)(OH)
 
4
· 4H
 
2
O
20.1.14Ceruleite
Cu
 
2
Al
 
7
(AsO
 
4
)
 
4
(OH)
 
13
· 11.5H
 
2
O
20.1.15Chenevixite
Cu
 
2
Fe
3+
2
(AsO
 
4
)
 
2
(OH)
 
4
20.1.16Arthurite
CuFe
3+
2
(AsO
 
4
,PO
 
4
,SO
 
4
)
 
2
(OH,O)
 
2
· 4H
 
2
O

Other Names for Arhbarite

Other Languages:
German:Arhbarit
Spanish:Arhbarita

Other Information

Fluorescence in UV light:Not Fluorescent
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Arhbarite

Reference List:

- +
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.

American Mineralogist: 68: 1038.

Internet Links for Arhbarite

Search Engines:
  • Look for Arhbarite on Google
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  • External Links:
  • Look for Arhbarite on Webmineral
  • Look for Arhbarite on Athena Mineralogy
  • Look for Arhbarite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Arhbarite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
  • Search for Arhbarite on Well-Arranged Molecules
  • Arhbarite specimens for sale - minfind.com
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  • Localities for Arhbarite

    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    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. Mineral. Mag. 67, 1099-1107
    No reference listed
    Morocco
     
    • Souss-Massa-Draâ Region
      • Ouarzazate Province
        • Tazenakht
          • Bou Azer District (Bou Azzer 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.
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