Bouazzerite Mineral Data

General Bouazzerite Information

Chemical Formula:

Bi6(Mg,Co)11Fe14[AsO4]18O12(OH)4(H2O)86

Composition:

Molecular Weight = 6,531.63 gm

Calcium 0.14 % Ca 0.20 % CaO

Magnesium 3.14 % Mg 5.21 % MgO

Chromium 0.51 % Cr 0.98 % CrO₃

Iron 10.77 % Fe 15.40 % Fe₂O₃

Cobalt 0.43 % Co 0.55 % CoO

Silicon 0.14 % Si 0.29 % SiO₂

Nickel 0.11 % Ni 0.14 % NiO

Bismuth 19.65 % Bi 21.90 % Bi₂O₃

Arsenic 19.50 % As 29.91 % As₂O₅

Hydrogen 2.84 % H 25.38 % H₂O

Oxygen 42.77 % O

______ ______

100.00 % 99.96 % = TOTAL OXIDE

Empirical Formula:

Environment:

From weathering of a Variscan hydrothermal As-Co-Ni-Ag-Au vein. New structure type.

IMA Status:

Approved IMA 2005 (Dana # Added)

Locality:

"Filon 7", Bou Azzer, Anti-Atlas, Morocco Link to MinDat.org Location Data.

Name Origin:

The name recognizes the exceptional significance of the Bou Azzer district and, in particular, of the Bou Azzer mine to mineralogical sciences and mineral collecting.

Synonym:

IMA2005-042

Bouazzerite Image

Images:

Bouazzerite

Comments: SEM image of prismatic bouazzerite crystals associated with botryoidal powellite and minute cubic crystals of alumopharmacosiderite.
Location: From the "Filon 7" (French for Vein 7) through "Puits 1" (shaft 1), Bou Azzer mine, Anti-Atlas, Morocco.. Scale: See Image.
© American Mineralogist

Bouazzerite Crystallography

Axial Ratios:

a:b:c =0.4474:1:0.606

Cell Dimensions:

a = 13.6322, b = 30.469, c = 18.4671, Z = 2; beta = 91.134° V = 7,668.98 Den(Calc)= 2.83

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2₁/n

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 11.79(1)(021), 7.9(0.8)(022), 10.16(0.8)(120),10.98(0.8)(101), 12.45(0.7)(110), 15.78(0.6)(011), 3.153(0.4)(353), 3.414(0.4)(333),

Physical Properties of Bouazzerite

Cleavage:

{100} Good, {021} Distinct

Color:

Apple green.

Diaphaneity:

Translucent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Habit:

Triangular Crystals - Occurs as triangular shaped crystals.

Luster:

Adamantine

Streak:

white

Optical Properties of Bouazzerite

Gladstone-Dale:

CI calc= 0 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2327,KC= 0.2327
Ncalc = 1.66

Optical Data:

Biaxial (?), a=1.657, g=1.66, bire=0.0030

Calculated Properties of Bouazzerite

Electron Density:

Bulk Density (Electron Density)=2.70 gm/cc
note: Specific Gravity of Bouazzerite =2.83 gm/cc.

Fermion Index:

Fermion Index = 0.0062003942
Boson Index = 0.9937996058

Photoelectric:

PE_Bouazzerite= 347.79 barns/electron
U=PE_Bouazzerite x rElectron Density= 940.67 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Bouazzerite is Not Radioactive

Bouazzerite Classification

Dana Class:

42.07.17.01 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.07)where (AB)5 (XO4)3 Zq ï¿½ x(H2O)

(42.07.17)Dana Group

42.07.17.01 Bouazzerite! Bi6(Mg,Co)11Fe14[AsO4]18O12(OH)4(H2O)86 P 2₁/n 2/m

Strunz Class:

08.DH.60 08 - PHOSPHATES, ARSENATES, VANADATES

08.D - Phosphates, etc

08.DH -With large and medium-sized cations, (OH, etc.):RO4 < 1:1

08.DH.60 Bouazzerite! Bi6(Mg,Co)11Fe14[AsO4]18O12(OH)4(H2O)86 P 2₁/n 2/m

Other Bouazzerite Information

References:

NAME( AmMin, v92:1630) PHYS. PROP.(AmMin, v92:1630) OPTIC PROP.(AmMin, v92:1630)

See Also:

Links to other databases for Bouazzerite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Print or Cut-and-Paste your Bouazzerite Specimen Label here :

Bouazzerite

Bi6(Mg,Co)11Fe14[AsO4]18O12(OH)4(H2O)86
Dana No: 42.07.17.01 Strunz No: 08.DH.60
Locality:

Notes:

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