Mineralogy Database

Parkerite Mineral Data

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General Parkerite Information

Help on Chemical  Formula: Chemical Formula: Ni3(Bi,Pb)2S2
Help on Composition: Composition: Molecular Weight = 657.27 gm
   Nickel   26.79 %  Ni
   Bismuth  47.69 %  Bi
   Lead     15.76 %  Pb
   Sulfur    9.76 %  S
           100.00 % 
Help on Empirical Formula: Empirical Formula: Ni3Bi1.5Pb0.5S2
Help on Environment: Environment: As grains in other hydrothermal sulfide and arsenide minerals.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1937
Help on Locality: Locality: Waterfall Gorge, Insizwa, Griqualand, South Africa. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Robert Luling Parker (1893-1973), Zurich, Switzerland.
Help on Name Pronunciation: Name Pronunciation: Parkerite + Pronunciation Say PARKERITE

Parkerite Image

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  Parkerite   Talnakhite

Comments: Cut, not polished section showing rounded grains of parkerite (yellow arrow) in 'dactiloscopyc' galena aggregate in talnakhite-chalcopyrite ore. Talnakhite is bronze-violet slightly oxidised grain streaked with golden chalcopyrite.
Location: Taimyr (Oktyabr'skoye; Oktyabr'sky) Cu-Ni deposit, Noril'sk, Putoran Plateau, Taimyr Peninsula, Taymyrskiy Autonomous Okrug, Eastern-Siberian Region, Russia. Scale: Picture Size 4x3 mm.
© Pavel M. Kartashov

Parkerite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9675:1:0.707
Help on Cell Dimensions: Cell Dimensions: a = 5.545, b = 5.731, c = 4.052, Z = 1; V = 128.77 Den(Calc)= 8.48
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pmam
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.86(1), 2.34(0.9), 4.02(0.7),

Physical Properties of Parkerite

Help on Cleavage: Cleavage: {010} Perfect, {111} Parting
Help on Color: Color: Bronze brown, Bronze.
Help on Density: Density: 8.5
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Metallic
Help on Streak: Streak: metallic

Optical Properties of Parkerite

Help on RL Anisotrophism: RL Anisotrophism: Strong, greenish gray to yellowish brown.
Help on RL Color: RL Color: Light cream.
Help on RL Pleochroism: RL Pleochroism: Perceptible.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Parkerite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   44.10   46.20 
 420 nm   44.60   47.10 
 440 nm   45.10   48.00 
 460 nm   45.50   48.80 
 480 nm   45.70   49.50 
 500 nm   45.80   50.00 
 520 nm   45.80   50.30 
 540 nm   45.80   50.50 
 560 nm   46.00   50.70 
 580 nm   46.30   51.00 
 600 nm   46.80   51.50 
 620 nm   47.40   51.90 
 640 nm   48.00   52.30 
 660 nm   48.50   52.80 
 680 nm   49.10   53.50 
 700 nm   49.60   53.80 
Calculated Relative Intensity Colors of Parkerite in Air
   0%   30%   60%   90% 100% 120% 150% 180% 200%

Calculated Properties of Parkerite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=7.26 gm/cc
note: Specific Gravity of Parkerite =8.48 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEParkerite =1,191.19 barns/electron
U=PEParkerite x rElectron Density=8,652.44 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Parkerite is Not Radioactive

Parkerite Classification

Help on  Dana Class: Dana Class: (02)Sulfides - Including Selenides and Tellurides
  (02.03)where Am Bn Xp, with (m+n):p=5:2
  (02.03.04)Dana Group Parkerite Ni3(Bi,Pb)2S2 Pmam 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 02.BE.20 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.B - Metal Sulfides, M:S > 1:1 (mainly 2:1)
  02.BE -With Pb(Bi)
02.BE.20 Parkerite Ni3(Bi,Pb)2S2 Pmam 2/m 2/m 2/m

Other Parkerite Information

Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Parkerite :
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

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Dana No: Strunz No: 02.BE.20





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