Parkinsonite
A valid IMA mineral species
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About Parkinsonite
Formula:
Pb7MoO9Cl2
Colour:
Bright red, purplish red, brownish red
Lustre:
Adamantine, Resinous, Pearly
Hardness:
2 - 2½
Specific Gravity:
7.32
Crystal System:
Tetragonal
Name:
For British mineral collector and dealer, Reginald F.D. Parkinson (20 May 1928, Battersea, Wandsworth - 13 March 1993, Bristol), who found the mineral.
Unique Identifiers
Mindat ID:
3123
Long-form identifier:
mindat:1:1:3123:9
GUID
(UUID V4):
(UUID V4):
a9d08a17-b8e0-4c1c-a2cb-1f8bd9854ff0
IMA Classification of Parkinsonite
Approved
IMA Formula:
Pb7MoO9Cl2
Approval year:
1991
First published:
1994
Classification of Parkinsonite
3.DB.40
3 : HALIDES
D : Oxyhalides, hydroxyhalides and related double halides
B : With Pb, Cu, etc.
3 : HALIDES
D : Oxyhalides, hydroxyhalides and related double halides
B : With Pb, Cu, etc.
10.5.11.1
10 : OXYHALIDES AND HYDROXYHALIDES
5 : Am(O,OH)pXq
10 : OXYHALIDES AND HYDROXYHALIDES
5 : Am(O,OH)pXq
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Pkn | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of Parkinsonite
Pronunciation:
Play | Recorded by | Country |
---|---|---|
Jolyon Ralph | United Kingdom |
Physical Properties of Parkinsonite
Adamantine, Resinous, Pearly
Transparency:
Translucent
Colour:
Bright red, purplish red, brownish red
Streak:
Scarlet to grenadine-red
Hardness:
2 - 2½ on Mohs scale
Hardness:
VHN50=122 kg/mm2 - Vickers
Tenacity:
Sectile
Cleavage:
Perfect
{001}, perfect; {100}, possible, fair
{001}, perfect; {100}, possible, fair
Density:
7.32 g/cm3 (Measured) 7.39 g/cm3 (Calculated)
Optical Data of Parkinsonite
Type:
Uniaxial (-)
RI values:
nω = 2.580 nε = 2.420
Max Birefringence:
δ = 0.160
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Very High
Anisotropism:
Weak to moderate
Bireflectance:
Moderate
Colour in reflected light:
gray
Internal Reflections:
deep red to red-orange
Pleochroism:
Strong
Comments:
O = brownish red; E = greenish yellow
Chemistry of Parkinsonite
Mindat Formula:
Pb7MoO9Cl2
Elements listed:
Crystallography of Parkinsonite
Crystal System:
Tetragonal
Cell Parameters:
a = 3.9992(3) Å, c = 22.514(3) Å
Ratio:
a:c = 1 : 5.63
Unit Cell V:
360.08 ų (Calculated from Unit Cell)
Z:
2
Comment:
Point Group: 4/m 2/m 2/m, 42m, 4mm, or 422; Space Group: I4/mmm, I42m, I4m2, I4mm, or I422.
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
2.983 Å | (100) |
2.816 Å | (78) |
1.989 Å | (75) |
1.658 Å | (51) |
1.586 Å | (33) |
3.507 Å | (32) |
1.263 Å | (24) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 7: Great Oxidation Event | <2.4 |
47g : [Halogen-bearing surface weathering minerals] | |
47h : [Near-surface oxidized, dehydrated minerals] |
Type Occurrence of Parkinsonite
Co-Type Localities:
General Appearance of Type Material:
As bladed crystals, to 0.3 mm, and crystalline aggregates
Place of Conservation of Type Material:
The Natural History Museum, London, England, 1987,478–479.
Associated Minerals at Type Locality:
Reference:
Symes, R.F., Cressey, G., Griddle, A.J., Stanley, C.J., Francis, J.G., and Jones, G.C. (1994) Parkinsonite, (Pb,Mo,□)8O8Cl2, a new mineral from Merehead Quarry, Somerset. Mineralogical Magazine: 58(390): 59-68.
Synonyms of Parkinsonite
Other Language Names for Parkinsonite
German:Parkinsonit
Spanish:Parkinsonita
Common Associates
Associated Minerals Based on Photo Data:
12 photos of Parkinsonite associated with Mendipite | Pb3Cl2O2 |
4 photos of Parkinsonite associated with Lead-bearing Aragonite | (Ca,Pb)CO3 |
3 photos of Parkinsonite associated with Mereheadite | Pb47Cl25(OH)13O24(CO3)(BO3)2 |
3 photos of Parkinsonite associated with Diaboleite | Pb2CuCl2(OH)4 |
3 photos of Parkinsonite associated with Chloroxiphite | Pb3CuO2Cl2(OH)2 |
3 photos of Parkinsonite associated with Calcite | CaCO3 |
3 photos of Parkinsonite associated with Manganese Oxides | |
1 photo of Parkinsonite associated with Manganese-bearing Calcite | (Ca,Mn)CO3 |
Related Minerals - Strunz-mindat Grouping
3.DB. | Rickturnerite | Pb7O4[Mg(OH)4](OH)Cl3 |
3.DB.05 | Diaboleite | Pb2CuCl2(OH)4 |
3.DB.10 | Pseudoboleite | Pb31Cu24Cl62(OH)48 |
3.DB.15 | Boleite | KPb26Ag9Cu24(OH)48Cl62 |
3.DB.20 | Cumengeite | Pb21Cu20Cl42(OH)40 · 6H2O |
3.DB.25 | Bideauxite | Pb2AgCl3(F,OH)2 |
3.DB.30 | Chloroxiphite | Pb3CuO2Cl2(OH)2 |
3.DB.35 | Hematophanite | Pb4Fe3O8(OH,Cl) |
3.DB.40 | Asisite | Pb7SiO9Cl2 |
3.DB.40 | Janchevite | Pb7V5+(O8.5◻0.5)Cl2 |
3.DB.45 | Murdochite | PbCu6O8-x(Cl,Br)2x |
3.DB.45 | Eddavidite | Pb2Cu12O15Br2 |
3.DB.50 | Yedlinite | Pb6Cr3+Cl6(O,OH,H2O)8 |
3.DB.55 | Siidraite | Pb2Cu(OH)2I3 |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Parkinsonite
mindat.org URL:
https://www.mindat.org/min-3123.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
Mineral Dealers:
References for Parkinsonite
Reference List:
Symes, R. F., Cressey, G., Griddle, A. J., Stanley, C. J., Francis, J. G., Jones, G. C. (1994) Parkinsonite, (Pb,Mo,□)8O8Cl2, a new mineral from Merehead Quarry, Somerset. Mineralogical Magazine, 58 (390) 59-68 doi:10.1180/minmag.1994.058.390.06
Jambor, John L., Roberts, Andrew C., Vanko, David A. (1994) New Mineral Names. American Mineralogist, 79 (9-10) 1009-1014
Localities for Parkinsonite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Namibia | |
| |
UK (TL) | |
| |
| |
USA | |
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Torr Works Quarry, Cranmore, Mendip, Somerset, England, UK