Arhbarite
A valid IMA mineral species
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About Arhbarite
Overview of the Aghbar mine
Aghbar Mine, Aghbar, Tansifte Caïdat, Agdz Cercle, Zagora Province, Drâa-Tafilalet Region, Morocco
Aghbar Mine, Aghbar, Tansifte Caïdat, Agdz Cercle, Zagora Province, Drâa-Tafilalet Region, Morocco
Formula:
Cu2Mg(AsO4)(OH)3
Colour:
Dark blue to medium blue
Lustre:
Sub-Vitreous, Waxy
Specific Gravity:
3.71
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.
Unique Identifiers
Mindat ID:
333
Long-form identifier:
mindat:1:1:333:1
GUID
(UUID V4):
(UUID V4):
9d25d12d-3bf1-49a3-b7cb-2c101d895adc
Classification of Arhbarite
Approved
IMA status notes:
Redefined by the IMA
First published:
19982
Approval history:
Redefined IMA 2002-B (as triclinic): Krause et al (2003); Grice et al. (2003).
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
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
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
20 : Arsenates (also arsenates with phosphate, but without other anions)
1 : Arsenates of Cu
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Arh | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Arhbarite
Sub-Vitreous, Waxy
Transparency:
Translucent
Colour:
Dark blue to medium blue
Streak:
Light blue, sky-blue
Tenacity:
Brittle
Cleavage:
None Observed
Density:
3.71 g/cm3 (Measured) 3.99(4) g/cm3 (Calculated)
Comment:
Dcalc 3.96, Moroccan sample, and 4.03, Chilean sample.
Optical Data of Arhbarite
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.
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:
Cu2Mg(AsO4)(OH)3
Crystallography of Arhbarite
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°
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 Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.57 Å | (100) |
| 4.51 Å | (90) |
| 3.72 Å | (60) |
| 3.25 Å | (40) |
| 2.63 Å | (40) |
| 2.60 Å | (50) |
| 2.47 Å | (50) |
Comments:
ICDD 35-562.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-? alteration and/or metamorphism | |
| 33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Geological Setting:
Oxidized zone of a hydrothermal polymetallic ore deposit.
Type Occurrence of Arhbarite
General Appearance of Type Material:
Blue, spherulitic aggregates on massive dolomite.
Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA, 160383.
Geological Setting of Type Material:
Oxidized zone of a hydrothermal polymetallic ore deposit.
Associated Minerals at Type Locality:
Other Language Names for Arhbarite
Common Associates
Associated Minerals Based on Photo Data:
| 34 photos of Arhbarite associated with Conichalcite | CaCu(AsO4)(OH) |
| 16 photos of Arhbarite associated with Guanacoite | Cu2Mg3(AsO4)2(OH)4 · 4H2O |
| 14 photos of Arhbarite associated with Gilmarite | Cu3(AsO4)(OH)3 |
| 7 photos of Arhbarite associated with Enargite | Cu3AsS4 |
| 2 photos of Arhbarite associated with Malachite | Cu2(CO3)(OH)2 |
| 1 photo of Arhbarite associated with Quartz | SiO2 |
| 1 photo of Arhbarite associated with Dolomite | CaMg(CO3)2 |
| 1 photo of Arhbarite associated with Calcite | CaCO3 |
Related Minerals - Strunz-mindat Grouping
| 8.BE.05 | Augelite | Al2(PO4)(OH)3 |
| 8.BE.10 | Grattarolaite | Fe3+3(PO4)O3 |
| 8.BE.15 | Cornetite | Cu3(PO4)(OH)3 |
| 8.BE.20 | Clinoclase | Cu3(AsO4)(OH)3 |
| 8.BE.25 | Gilmarite | Cu3(AsO4)(OH)3 |
| 8.BE.30 | Allactite | Mn2+7(AsO4)2(OH)8 |
| 8.BE.30 | Flinkite | Mn2+2Mn3+(AsO4)(OH)4 |
| 8.BE.30 | Raadeite | Mg7(PO4)2(OH)8 |
| 8.BE.30 | Argandite | Mn7(VO4)2(OH)8 |
| 8.BE.35 | Chlorophoenicite | (Mn,Mg)3Zn2(AsO4)(OH,O)6 |
| 8.BE.35 | Magnesiochlorophoenicite | (Mg,Mn)3Zn2(AsO4)(OH,O)6 |
| 8.BE.35 | Mineral E (of Dunn, et. al., 1982) | |
| 8.BE.40 | Gerdtremmelite | (Zn,Fe)(Al,Fe)2(AsO4)(OH)5 |
| 8.BE.45 | Dixenite | CuMn2+14Fe2+(SiO4)2(As5+O4)(As3+O3)5(OH)6 |
| 8.BE.45 | Hematolite | (Mn,Mg,Al,Fe3+)15(As5+O4)2(As3+O3)(OH)23 |
| 8.BE.45 | Kraisslite | Zn3(Mn,Mg)25(Fe3+,Al)(As3+O3)2[(Si,As5+)O4]10(OH)16 |
| 8.BE.45 | Mcgovernite | Mn19Zn3(AsO4)3(AsO3)(SiO4)3(OH)21 |
| 8.BE.45 | Arakiite | (Zn,Mn2+)(Mn2+,Mg)12(Fe3+,Al)2(As5+O4)2(As3+O3)(OH)23 |
| 8.BE.45 | Turtmannite | (Mn,Mg)22.5Mg3-3x((V5+,As5+)O4)3(As3+O3)x(SiO4)3O5-5x(OH)20+x |
| 8.BE.45 | Carlfrancisite | Mn2+3(Mn2+,Mg,Fe3+,Al)42[As3+O3]2(As5+O4)4[(Si,As5+)O4]6[(As5+,Si)O4]2(OH)42 |
| 8.BE.50 | Synadelphite | Mn2+9(As5+O4)2(As3+O3)(OH)9 · 2H2O |
| 8.BE.55 | Holdenite | (Mn2+,Mg)6Zn3(AsO4)2(SiO4)(OH)8 |
| 8.BE.60 | Kolicite | Mn2+7Zn4(AsO4)2(SiO4)2(OH)8 |
| 8.BE.65 | Sabelliite | (Cu,Zn)2Zn(AsO4,SbO4)(OH)3 |
| 8.BE.70 | Jarosewichite | Mn2+3Mn3+(AsO4)(OH)6 |
| 8.BE.75 | Theisite | Cu5Zn5(AsO4,SbO4)2(OH)14 |
| 8.BE.80 | Coparsite | Cu4(AsO4,VO4)O2Cl |
| 8.BE.85 | Waterhouseite | Mn2+7(PO4)2(OH)8 |
| 8.BE.90 | Vasilseverginite | Cu9O4(AsO4)2(SO4)2 |
Fluorescence of Arhbarite
Not fluorescent.
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Arhbarite
mindat.org URL:
https://www.mindat.org/min-333.html
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References for Arhbarite
Reference List:
Localities for Arhbarite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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).
All localities listed without proper references should be considered as questionable.
Chile | |
| |
Morocco (TL) | |
|
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