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Bouazzerite

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About BouazzeriteHide

Formula:
Bi6(Mg,Co)11Fe3+14(AsO4)18(OH)4O12 · 86H2O
Colour:
Pale apple green to bottle green
Lustre:
Adamantine
Specific Gravity:
2.81 (Calculated)
Crystal System:
Monoclinic
Name:
For the type locality
Unique combination of elements. First mineral with Bi-As-Fe nanoclusters. Contains admixture, i.a., of Cr3+.

The structure is based on [Bi3Fe7O6(OH)2(AsO4)9]11– nanoclusters, surrounding [Fe(Fe3(OH)O12)2]29- groups containing one trigonal prismatic and six octahedral Fe ions. Chains of Mg(O,H2O)6 octahedra provide a link to the nanoclusters. Channels along [100] contain structural water.


Classification of BouazzeriteHide

Approved
Approval Year:
2005
8.DH.60

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
H : With large and medium-sized cations, (OH, etc.):RO4 < 1:1

Pronounciation of BouazzeriteHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of BouazzeriteHide

Adamantine
Transparency:
Translucent
Colour:
Pale apple green to bottle green
Streak:
colorless
Tenacity:
Very brittle
Cleavage:
Distinct/Good
{021}
Density:
2.81(2) g/cm3 (Calculated)
Comment:
calc. from x-ray structure refinement

Optical Data of BouazzeriteHide

Type:
Biaxial
RI values:
nα = 1,657.000
Max Birefringence:
δ = 1,657.000
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Pleochroism:
Weak
Comments:
Very weak from yellow to pale yellow

Chemical Properties of BouazzeriteHide

Formula:
Bi6(Mg,Co)11Fe3+14(AsO4)18(OH)4O12 · 86H2O
IMA Formula:
Bi6(Mg,Co)11Fe14(AsO4)18O12(OH)4 · 86H2O

Crystallography of BouazzeriteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 13.6322 Å, b = 30.469 Å, c = 18.4671 Å
β = 91.134°
Ratio:
a:b:c = 0.447 : 1 : 0.606
Unit Cell V:
7669 ų
Z:
2
Morphology:
prisms {021} and {110}
Comment:
Space group is P21/n

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
11.79 (100)
10.98 (80)
10.16 (80)
7.900 (80)
12.45 (70)
15.78 (60)
3.414 (40)
3.153 (40)

Type Occurrence of BouazzeriteHide

General Appearance of Type Material:
Prismatic crystals ({021} face) up to 0.8 mm in length.
Place of Conservation of Type Material:
Musée Géologique Cantonal, Lausanne, Switzerland (MGL no. 79798, holotype, and MGL no. 79803, co-type)
Geological Setting of Type Material:
Oxidation product of As-Ni-Fe-Co-Bi ores in quartz-carbonate veins hosted by chromite-bearing serpentinites.
Associated Minerals at Type Locality:

Synonyms of BouazzeriteHide

Related Minerals - Nickel-Strunz GroupingHide

8.DH.05MinyuliteKAl2(PO4)2(OH,F) · 4H2OOrth. mm2 : Pba2
8.DH.10LeucophosphiteKFe3+2(PO4)2(OH) · 2H2OMon. 2/m : P21/b
8.DH.10Spheniscidite(NH4,K)(Fe3+,Al)2(PO4)2(OH) · 2H2OMon.
8.DH.10TinsleyiteKAl2(PO4)2(OH) · 2H2OMon.
8.DH.15Jahnsite-(CaMnFe){Ca}{Mn2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(CaMnMg){Ca}{Mn2+}{(Mg,Fe2+)2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(CaMnMn){Ca}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15KeckiteCaMn2+(Fe3+Mn2+)Fe3+2(PO4)4(OH)3 · 7H2OMon. 2/m : P2/b
8.DH.15Rittmannite{(Mn2+,Ca)}{Mn2+}{(Fe2+,Mn2+,Mg)2}{(Al,Fe3+)2}(PO4)4(OH)2 · 8H2OMon.
8.DH.15Whiteite-(CaFeMg){Ca}{(Fe2+,Mn2+)}{Mg2}{Al2}(PO4)4(OH)2 · 8H2OMon. 2/m : P21/b
8.DH.15Whiteite-(CaMnMg){Ca}{Mn2+}{Mg2}{Al2}(PO4)4(OH)2 · 8H2OMon. 2/m
8.DH.15Whiteite-(MnFeMg){(Mn2+,Ca)}{(Fe2+,Mn2+)}{Mg2}{Al2}(PO4)4(OH)2 · 8H2OMon. 2/m : P21/b
8.DH.15Jahnsite-(MnMnMn){Mn2+}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon.
8.DH.15Kaluginite(Mn2+,Ca)MgFe3+(PO4)2(OH) · 4H2OOrth.
8.DH.15Jahnsite-(CaFeFe){Ca}{Fe2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon.
8.DH.15Jahnsite-(NaFeMg)NaFe3+Mg2Fe3+2(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(NaMnMg){(Na,Ca)}{(Mn2+,Fe3+)}{(Mg,Fe3+)2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(CaMgMg){Ca}{Mg}{Mg2}{Fe3+2}(PO4)4(OH)2 · 8H2O
8.DH.20Manganosegelerite(Mn2+,Ca)(Mn2+,Fe2+,Mg)Fe3+(PO4)2(OH) · 4H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.DH.20OveriteCaMgAl(PO4)2(OH) · 4H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.DH.20SegeleriteCa2 Mg2 Fe3+2(PO4)4(OH)2 · 8H2OOrth. mmm (2/m 2/m 2/m) : Pcca
8.DH.20WilhelmvierlingiteCaMnFe3+(PO4)2(OH) · 2H2OOrth.
8.DH.20JuonniiteCaMgSc(PO4)2(OH) · 4H2OOrth.
8.DH.25CalcioferriteCa2Fe3+2(PO4)3(OH) · 7H2OMon. 2/m : B2/b
8.DH.25KingsmountiteCa4(Fe2+,Mn2+)Al4(PO4)6(OH)4 · 12H2OMon. 2 : B2
8.DH.25MontgomeryiteCa4MgAl4(PO4)6(OH)4 · 12H2OMon. 2 : B2
8.DH.25ZodaciteCa4Mn2+Fe3+4(PO4)6(OH)4 · 12H2OMon.
8.DH.30ArseniosideriteCa2Fe3+3(AsO4)3O2 · 3H2OMon. 2/m : B2/b
8.DH.30KolfaniteCa2Fe3+3O2(AsO4)3 · 2H2OMon.
8.DH.30MitridatiteCa2Fe3+3(PO4)3O2 · 3H2OMon. 2/m : B2/b
8.DH.30PararobertsiteCa2Mn3+3(PO4)3O2 · 3H2OMon. 2/m : P21/b
8.DH.30RobertsiteCa2Mn3+3(PO4)3O2 · 3H2OMon. m : Bb
8.DH.30Sailaufite(Ca,Na,☐)2Mn3+3(AsO4)2(CO3)O2 · 3H2OMon.
8.DH.35MantienneiteKMg2Al2Ti(PO4)4(OH)3 · 15H2OOrth.
8.DH.35PaulkerriteK(Mg,Mn2+)2(Fe3+,Al,Ti,Mg)2Ti(PO4)4(OH)3 · 15H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.DH.35Benyacarite(H2O,K)2(Mn2+,Fe2+)2(Fe3+,Ti)2Ti(PO4)4(O,F)2 · 14H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.DH.40XanthoxeniteCa4Fe3+2(PO4)4(OH)2 · 3H2OTric. 1 : P1
8.DH.45MahnertiteNaCu3(AsO4)2Cl · 5H2OTet. 4/mmm (4/m 2/m 2/m) : I4/mmm
8.DH.50AndyrobertsiteKCdCu5(AsO4)4(H2AsO4) · 2H2OMon.
8.DH.50CalcioandyrobertsiteKCaCu5(AsO4)4(H2AsO4) · 2H2OMon. 2/m : P21/m
8.DH.55EnglishiteK3Na2Ca10Al15(PO4)21(OH)7 · 26H2OMon. 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 BouazzeriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
N. Meisser, J. Brugger (2006): "Bouazzerit und Maghrebit, zwei neue Arsenatmineralien aus dem Revier Bou Azzer, Marokko", Lapis 31(7/8), 69-71. (in German)
Brugger, J., N. Meissier, S. Krivovichev, T.Armbruster, G. Favreau (2007): "Mineralogy and crystal structure of bouazzerite from Bou azzer, Anti-Atlas, Morocco: Bi-As-Fe nanoclusters containing Fe3+ in trigonal prismatic coordination", Am. Min. 92, 1630-1639.

Internet Links for BouazzeriteHide

Localities for BouazzeriteHide

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.
Morocco (TL)
 
  • Drâa-Tafilalet Region
    • Ouarzazate Province
      • Tazenakht
        • Bou Azzer District (Bou Azer District)
          • Bou Azzer Mine (Bou Azer Mine; Bouazzar Mine)
Brugger, J., N. Meissier, S. Krivovichev, T.Armbruster, G. Favreau (2007): "Mineralogy and crystal structure of bouazzerite from Bou azzer, Anti-Atlas, Morocco: Bi-As-Fe nanoclusters containing Fe3+ in trigonal prismatic coordination", Am. Min. 92, 1630-1639.
Mineral and/or Locality  
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