Parkerite Mineral Data (original) (raw)
General Parkerite Information
Chemical Formula:
Ni3(Bi,Pb)2S2
Composition:
Molecular Weight = 657.27 gm
Nickel 26.79 % Ni
Bismuth 47.69 % Bi
Lead 15.76 % Pb
Sulfur 9.76 % S
______
100.00 %
Empirical Formula:
Ni3Bi1.5Pb0.5S2
Environment:
As grains in other hydrothermal sulfide and arsenide minerals.
IMA Status:
Valid Species (Pre-IMA) 1937
Locality:
Waterfall Gorge, Insizwa, Griqualand, South Africa. Link to MinDat.org Location Data.
Name Origin:
Named for Robert Luling Parker (1893-1973), Zurich, Switzerland.
Name Pronunciation:
Parkerite + Pronunciation 
Parkerite Image
Images:
 |
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 |
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Parkerite Crystallography
Axial Ratios:
a:b:c =0.9675:1:0.707
Cell Dimensions:
a = 5.545, b = 5.731, c = 4.052, Z = 1; V = 128.77 Den(Calc)= 8.48
Crystal System:
Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pmam
X Ray Diffraction:
By Intensity(I/Io): 2.86(1), 2.34(0.9), 4.02(0.7),
Crystal Structure:
Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
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| | Fleet M E , American Mineralogist , 58 (1973) p.435-439, The crystal structure of parkerite (Ni3Bi2S2) | | --------------------------------------------------------------------------------------------------------- |
Physical Properties of Parkerite
Cleavage:
{010} Perfect, {111} Parting
Color:
Bronze brown, Bronze.
Density:
8.5
Diaphaneity:
Opaque
Fracture:
Brittle - Uneven - Very brittle fracture producing uneven fragments.
Habit:
Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Habit:
Microscopic Crystals - Crystals visible only with microscopes.
Hardness:
3 - Calcite
Luster:
Metallic
Streak:
metallic
Optical Properties of Parkerite
RL Anisotrophism:
Strong, greenish gray to yellowish brown.
RL Color:
Light cream.
RL Pleochroism:
Perceptible.
Reflectivity
Standardized Intensity (100%) Reflection Spectra of Parkerite in Air
| λ | R1 | R 2 |  |
∑ 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 |  |
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| 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 |  |
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| 660 nm | 48.50 | 52.80 |  |
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| 680 nm | 49.10 | 53.50 |  |
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| 700 nm | 49.60 | 53.80 |  |
Calculated Relative Intensity Colors of Parkerite in Air
| RelativeIntensity | 0% | 30% | 60% | 90% | 100% | 120% | 150% | 180% | 200% |
|---|---|---|---|---|---|---|---|---|---|
| R1 | |||||||||
| R2 |
Calculated Properties of Parkerite
Electron Density:
Bulk Density (Electron Density)=7.26 gm/cc
note: Specific Gravity of Parkerite =8.48 gm/cc.
Fermion Index:
Fermion Index = 0.03
Boson Index = 0.97
Photoelectric:
PEParkerite =1,191.19 barns/electron
U=PEParkerite x rElectron Density=8,652.44 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Parkerite is Not Radioactive
Parkerite Classification
Dana Class:
02.03.04.01 (02)Sulfides - Including Selenides and Tellurides
(02.03)where Am Bn Xp, with (m+n):p=5:2
(02.03.04)Dana Group
02.03.04.01 Parkerite Ni3(Bi,Pb)2S2 Pmam 2/m 2/m 2/m
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
References:
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
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
15 - WWW-MINCRYST
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Ask about Parkerite here :
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Print or Cut-and-Paste your Parkerite Specimen Label here :
Parkerite
Ni3(Bi,Pb)2S2
Dana No: 02.03.04.01 Strunz No: 02.BE.20
Locality:
Notes: