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 % Fe2 O3
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 % Bi2 O3
Arsenic 19.50 % As 29.91 % As2 O5
Hydrogen 2.84 % H 25.38 % H2 O
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
X Ray Diffraction:
By Intensity(I/Io ): 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:
PEBouazzerite = 347.79 barns/electronU=PEBouazzerite x r Electron 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 � 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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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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