Parkinsonite Mineral Data (original) (raw)
General Parkinsonite Information
Chemical Formula:
(Pb,Mo,[ ])8O8Cl2
Composition:
Molecular Weight = 1,697.27 gm
Molybdenum 2.83 % Mo 3.77 % MoO2
Lead 85.45 % Pb 92.05 % PbO
Chlorine 4.18 % Cl 4.18 % Cl
Oxygen 7.54 % O
______ ______
100.00 % 99.06 % = TOTAL OXIDE
Empirical Formula:
Pb7Mo0.5O8Cl2
Environment:
In fractures and vugs in carbonates associated with Fe, Mn oxides.
IMA Status:
Approved IMA 1994
Locality:
Merehead Quarry, Cranmore, Somerset, England. Link to MinDat.org Location Data.
Name Origin:
Named after Reginald F. D. Parkinson, English mineral collector from Somerset.
Name Pronunciation:
Parkinsonite + Pronunciation 
Synonym:
IMA1991-030
Parkinsonite Image
Images:
 |
Parkinsonite Comments: Prismatic crystals of parkinsonite projecting into cerussite and illustrating {001} cleavage and irregular fracture. Associated mineral is wulfenite. (MinMag, v58:390). Location: Merehead Quarry, Cranmore, Somerset, in the south west of England.Scale: Scale Bar 250 µm. © Mineralogical Magazine |
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Parkinsonite Crystallography
Axial Ratios:
a:c = 1:5.63977
Cell Dimensions:
a = 3.992, c = 22.514, Z = 1; V = 358.78 Den(Calc)= 7.85
Crystal System:
Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: I 4/mmm
X Ray Diffraction:
By Intensity(I/Io): 2.983(1), 2.816(0.78), 1.989(0.75),
Physical Properties of Parkinsonite
Cleavage:
{001} Perfect, {100} Good
Color:
Carmine red, Purple red, Brownish red.
Density:
7.32
Diaphaneity:
Translucent
Fracture:
Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
Habit:
Platy - Sheet forms (e.g. micas).
Hardness:
2-2.5 - Gypsum-Finger Nail
Luminescence:
Non-fluorescent.
Luster:
Adamantine
Streak:
dark red
Optical Properties of Parkinsonite
Dichroism (e):
greenish yellow.
Dichroism (w):
brownish red.
Gladstone-Dale:
CI meas= -0.511 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.409 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1911,KPDmeas= 0.2049,KC= 0.1356
Ncalc = 1.99 - 2.06
Optical Data:
Uniaxial (-), e=2.42, w=2.58, bire=0.1600.
RL Anisotrophism:
Weak to moderate.
RL Bireflectance:
Moderate.
RL Color:
Gray with deep red to red-orange internal reflections.
Reflectivity
Standardized Intensity (100%) Reflection Spectra of Parkinsonite in Air
| λ | R1 | R 2 |  |
∑ R1(λ) | ∑ R2(λ) |
|---|---|---|---|---|---|
| 400 nm | 22.60 | 21.80 |  |
||
| 420 nm | 22.40 | 21.20 |  |
||
| 440 nm | 22.30 | 20.50 |  |
||
| 460 nm | 22.20 | 19.90 |  |
||
| 480 nm | 21.90 | 19.40 |  |
||
| 500 nm | 21.60 | 18.90 |  |
||
| 520 nm | 21.20 | 18.50 |  |
||
| 540 nm | 20.60 | 18.10 |  |
||
| 560 nm | 20.20 | 17.80 |  |
||
| 580 nm | 19.80 | 17.50 |  |
||
| 600 nm | 19.40 | 17.20 |  |
||
| 620 nm | 19.10 | 17.10 |  |
||
| 640 nm | 18.90 | 17.00 |  |
||
| 660 nm | 18.70 | 16.90 |  |
||
| 680 nm | 18.60 | 16.70 |  |
||
| 700 nm | 18.50 | 16.70 |  |
Calculated Relative Intensity Colors of Parkinsonite in Air
| RelativeIntensity | 0% | 50% | 100% | 150% | 200% | 250% | 300% | 350% | 400% | 450% | 500% |
|---|---|---|---|---|---|---|---|---|---|---|---|
| R1 | |||||||||||
| R2 |
Calculated Properties of Parkinsonite
Electron Density:
Bulk Density (Electron Density)=6.41 gm/cc
note: Specific Gravity of Parkinsonite =7.85 gm/cc.
Fermion Index:
Fermion Index = 0.19
Boson Index = 0.81
Photoelectric:
PEParkinsonite =1,612.04 barns/electron
U=PEParkinsonite x rElectron Density=10333.73 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Parkinsonite is Not Radioactive
Parkinsonite Classification
Dana Class:
10.05.11.01 (10)Oxyhalides and Hydroxyhalides
(10.05)where Am (O,OH)p Xq
(10.05.11)Dana Group
10.05.11.01 Parkinsonite (Pb,Mo,[])8O8Cl2 I 4/mmm 4/m 2/m 2/m
Strunz Class:
03.DB.40 03 - HALIDES
03.D - Oxyhalides, Hydroxyhalides and Related Double Halides
03.DB -With Pb, Cu, etc.
03.DB.40 Asisite Pb12(SiO4)O8Cl4 I 4/mmm 4/m 2/m 2/m
03.DB.40 Parkinsonite (Pb,Mo,[])8O8Cl2 I 4/mmm 4/m 2/m 2/m
Other Parkinsonite Information
References:
NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.79,p1011,1994) OPTIC PROP.(AntBidBlaNic3)
See Also:
Links to other databases for Parkinsonite :
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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Print or Cut-and-Paste your Parkinsonite Specimen Label here :
Parkinsonite
(Pb,Mo,[ ])8O8Cl2
Dana No: 10.05.11.01 Strunz No: 03.DB.40
Locality:
Notes: