Mineralogy Database

Bamfordite Mineral Data

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General Bamfordite Information

Help on Chemical  Formula: Chemical Formula: Fe+++Mo2O6(OH)3•(H2O)
Help on Composition: Composition: Molecular Weight = 412.76 gm
   Iron        13.53 %  Fe   19.34 % Fe2O3
   Molybdenum  46.49 %  Mo   69.74 % MoO3
   Hydrogen     1.22 %  H    10.91 % H2O
   Oxygen      38.76 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe3+Mo2O6(OH)3•(H2O)
Help on Environment: Environment: In tungsten-molybdenum-bismuth deposits formed by the oxidation of molybdenite.
Help on IMA Status: IMA Status: Approved IMA 1996 (Dana # Added)
Help on Locality: Locality: Found at the Bamford Hill W-Mo-Bi deposits, 85 km WSW of Cairns, northern Queensland, Australia, Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Bamfordite + Pronunciation Say BAMFORDITE
Help on Synonym: Synonym: ICSD 77506
  PDF 50-1619

Bamfordite Image

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Comments: Scanning electron micrograph showing the typical morphology of bamfordite crystals. (AmMin, 83:173).
Location: Abandoned W-Mo-Bi mines at Bamford, Queensland, Australia. Scale: Scale Bar 20 µm.
© American Mineralogist

Bamfordite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.7805:1:1.2483
Help on Cell Dimensions: Cell Dimensions: a = 5.889, b = 7.545, c = 9.419, Z = 2; alpha = 71.46°, beta = 83.42°, gamma = 72.78° V = 376.51 Den(Calc)= 3.64
Help on Crystal System: Crystal System: Triclinic Space Group: P1 or P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.319(1), 3.232(0.9), 5.62(0.7),

Physical Properties of Bamfordite

Help on Cleavage: Cleavage: {100} Fair
Help on Color: Color: Green, Yellowish green.
Help on Density: Density: 3.62
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Luster: Luster: Vitreous - Adamantine
Help on Streak: Streak: greenish yellow

Optical Properties of Bamfordite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.067 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.067 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2808,KPDmeas= 0.2808,KC= 0.2633
Ncalc = 1.95
Help on Optical Data: Optical Data: Biaxial (-), a=1.91, b=2.03, g=2.11, bire=0.2000

Calculated Properties of Bamfordite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.42 gm/cc
note: Specific Gravity of Bamfordite =3.62 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.12
Boson Index = 0.88
Help on Photoelectric: Photoelectric: PEBamfordite = 79.46 barns/electron
U=PEBamfordite x rElectron Density= 271.79 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Bamfordite is Not Radioactive

Bamfordite Classification

Help on  Dana Class: Dana Class: (49)Basic and Hydrated Molybdates and Tungstates
  (49.03)(Hydrated, containing Hydroxyl or Halogen)
  (49.03.07)Dana Group Bamfordite! FeMo2O6(OH)3•(H2O) P1 or P1 Tri
Help on  Strunz Class: Strunz Class: 04.FK.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.F - Hydroxides (without V or U)
  04.FK -Hydroxides with H2O � (OH); chains of edge-sharing octahedra
04.FK.05 Bamfordite! FeMo2O6(OH)3•(H2O) P1 or P1 Tri

Other Bamfordite Information

Help on References: References: NAME( AmMin, Vol 83) PHYS. PROP.(Am.Min.,Vol.83,p172-177,1998) OPTIC PROP.(AmMin)
Help on See Also: See Also: Links to other databases for Bamfordite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: Strunz No: 04.FK.05





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