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Duhamelite Mineral Data

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General Duhamelite Information

Help on Chemical  Formula: Chemical Formula: Pb2Cu4Bi(VO4)4(OH)3•8(H2O)
Help on Composition: Composition: Molecular Weight = 1,532.47 gm
   Vanadium  13.30 %  V    23.74 % V2O5
   Copper    16.59 %  Cu   18.67 % Cu2O
   Bismuth   13.64 %  Bi   15.20 % Bi2O3
   Hydrogen   1.25 %  H    11.17 % H2O
   Lead      27.04 %  Pb   29.13 % PbO
   Oxygen    28.19 %  O
            ______        ______ 
            100.00 %       97.91 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb2Cu4Bi(VO4)4(OH)3•8(H2O)
Help on Environment: Environment: Au-bearing quartz veins cutting Precambrian greenstones. Approved in 1981. Discredited as being a Bi, Ca-bearing mottramite (IMA Code 01-B) in 2001.
Help on IMA Status: IMA Status: Discredited IMA 2001 - Approved IMA 1981
Help on Locality: Locality: 5 km SW of Payson, at Lousy Gulch, Gila County, Arizona, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named in 1981 for J. E. DuHamel, geologist, Phelps Dodge Corp., who found the mineral.
Help on Name Pronunciation: Name Pronunciation: Duhamelite + Pronunciation Say DUHAMELITE
Help on Synonym: Synonym: Discredited IMA 2001

Duhamelite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.7753:1:0.6076
Help on Cell Dimensions: Cell Dimensions: a = 7.49, b = 9.66, c = 5.87, Z = 1; V = 424.71 Den(Calc)= 5.99
Help on Crystal System: Crystal System: Orthorhombic Space Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.95(1), 2.642(0.9), 3.159(0.7),

Physical Properties of Duhamelite

Help on Color: Color: Greenish yellow, Olive green.
Help on Density: Density: 5.8
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 3 - Calcite
Help on Streak: Streak: yellow green

Optical Properties of Duhamelite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.159 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.185 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1828,KPDmeas= 0.1888,KC= 0.2244
Ncalc = 2.3 - 2.34
Help on Optical Data: Optical Data: Biaxial (?), a=2.08, b=2.11,
Help on Pleochroism (x): Pleochroism (x): weak yellow.
Help on Pleochroism (y): Pleochroism (y): weaker yellow.
Help on Pleochroism (z): Pleochroism (z): weaker yellow.

Calculated Properties of Duhamelite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.22 gm/cc
note: Specific Gravity of Duhamelite =5.80 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.06
Boson Index = 0.94
Help on Photoelectric: Photoelectric: PEDuhamelite = 715.19 barns/electron
U=PEDuhamelite x rElectron Density=3,735.40 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Duhamelite is Not Radioactive

Duhamelite Classification

Help on  Dana Class: Dana Class: (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.09)where (A)3 (XO4)2 Zq � x(H2O)
  (42.09.05)Dana Group Duhamelite? Pb2Cu4Bi(VO4)4(OH)3•8(H2O) Unk Ortho
Help on  Strunz Class: Strunz Class: 08.BH.40 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BH -With medium-sized and large cations, (OH,etc.):RO4 = 1:1
08.BH.40 Descloizite PbZn(VO4)(OH) Pnam 2/m 2/m 2/m
08.BH.40 Cechite Pb(Fe,Mn)(VO4)(OH) Pnam 2/m 2/m 2/m
08.BH.40 Duhamelite? Pb2Cu4Bi(VO4)4(OH)3•8(H2O) Unk Ortho
08.BH.40 Pyrobelonite PbMn(VO4)(OH) Pnam 2/m 2/m 2/m
08.BH.40 Mottramite PbCu(VO4)(OH) Pnam 2/m 2/m 2/m

Other Duhamelite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Duhamelite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: Strunz No: 08.BH.40





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