Nuffieldite Mineral Data

Nuffieldite Mineral Data
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General Nuffieldite Information

Help on Chemical Formula: Chemical Formula: Pb2Cu(Pb,Bi)Bi2S7
Help on Composition: Composition: Molecular Weight = 1,328.46 gm
   Copper    4.78 %  Cu
   Bismuth  39.33 %  Bi
   Lead     38.99 %  Pb
   Sulfur   16.90 %  S
           ______ 
           100.00 % 
Help on Empirical Formula: Empirical Formula: Pb2.5CuBi2.5S7
Help on Environment: Environment: Found in vugs in a small quartz vein in the Lime Creek stock.
Help on IMA Status: IMA Status: Approved IMA 1968
Help on Locality: Locality: Lime Creek stock, Alice Arm, BC, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Edward W. Nuffield (1914-), Canadian mineralogist.
Help on Name Pronunciation: Name Pronunciation: Nuffieldite + Pronunciation Say NUFFIELDITE
Help on Synonym: Synonym: ICSD 84625
  IMA1967-003
  PDF 19-675
 

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Nuffieldite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.6833:1:0.1884
Help on Cell Dimensions: Cell Dimensions: a = 14.61, b = 21.38, c = 4.03, Z = 4; V = 1,258.82 Den(Calc)= 7.01
Help on Crystal System: Crystal System: Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pbnm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.54(1), 3.66(1), 4(0.9),
Click Here for Large Nuffieldite Structure Window Crystal Structure:

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Moelo Y , Meerschaut A , Makovicky E , The Canadian Mineralogist , 35 (1997) p.1497-1508, Refinement of the crystal structure of nuffieldite, Pb2Cu1.4(Pb.4Bi.4Sb.2)Bi2S7:, Structural relationships and genesis of complex lead sulfosalt structures

 

Physical Properties of Nuffieldite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Gray, Steel gray, Grayish green, Reddish brown.
Help on Density: Density: 7.01
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 3.5-4 - Copper Penny-Fluorite
Help on Luster: Luster: Metallic
Help on Streak: Streak: grayish black
 

Optical Properties of Nuffieldite

Help on RL Anisotrophism: RL Anisotrophism: Very weak, from bluish gray to grayish red.
Help on RL Color: RL Color: Pale creamy white.
 

Calculated Properties of Nuffieldite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.84 gm/cc
note: Specific Gravity of Nuffieldite =7.01 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.08
Boson Index = 0.92
Help on Photoelectric: Photoelectric: PENuffieldite =1,481.29 barns/electron
U=PENuffieldite x rElectron Density=8,652.83 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Nuffieldite is Not Radioactive
 

Nuffieldite Classification
Help on Dana Class: Dana Class: 03.03.04.01 (03)Sulfides - Sulfosalts
  (03.03)where 3 < z/y < 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.03.04)Dana Group
 
03.03.04.01 Nuffieldite Pb2Cu(Pb,Bi)Bi2S7 Pbnm 2/m 2/m 2/m
 
03.03.04.02 Tsugaruite! Pb4As2S7 Pba2 or Pbam Ortho
Help on Strunz Class: Strunz Class: 02.JB.25g 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.J - Sulfosalts of PbS Archetype
  02.JB -Galena derivatives, with Pb
 
02.JB.25g Nuffieldite Pb2Cu(Pb,Bi)Bi2S7 Pbnm 2/m 2/m 2/m
 

Other Nuffieldite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Nuffieldite :
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 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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

Nuffieldite

Pb2Cu(Pb,Bi)Bi2S7
Dana No: 03.03.04.01 Strunz No: 02.JB.25g
Locality:

 

Notes: