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Parkinsonite

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Torr Works Quarry (Merehead Quarry), Cranmore, Somerset, England, UK
© Ian Jones

Show Parkinsonite Photos (3)
Formula:
(Pb,Mo,[])
 
8
O
 
8
Cl
 
2
System:TetragonalColour:Red to purplish-red
Hardness:2 - 2½
Name:For British mineral collector, Reginald F. D. Parkinson.
This page provides mineralogical data about Parkinsonite.

Classification of Parkinsonite

IMA status:Approved 1991
Strunz 8th edition ID:3/D.10-150
Nickel-Strunz 10th (pending) edition ID:3.DB.40

3 : HALIDES
D : Oxyhalides, hydroxyhalides and related double halides
B : With Pb, Cu, etc.
Dana 8th edition ID:10.5.11.1

10 : OXYHALIDES AND HYDROXYHALIDES
5 : Am(O,OH)pXq
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Type Occurrence of Parkinsonite

Co-type Localities:Torr Works Quarry (Merehead Quarry), Cranmore, Somerset, England, UK
Wesley Mine, Westbury on Trym, Somerset, England, UK
Year of Discovery:1994

Physical Properties of Parkinsonite

Colour:Red to purplish-red
Hardness (Mohs):2 - 2½

Crystallography of Parkinsonite

Crystal System:Tetragonal
Cell Parameters:a = 3.98Å, c = 22.34Å
Ratio:a:c = 1 : 5.613
Unit Cell Volume:V 353.87 ų (Calculated from Unit Cell)

Optical Data of Parkinsonite

Type:Uniaxial (-)
RI values: nω = 2.580 nε = 2.420
Maximum Birefringence:δ = 0.160

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High

Chemical Properties of Parkinsonite

Formula:
(Pb,Mo,[])
 
8
O
 
8
Cl
 
2
Essential elements:Cl, O, Pb
All elements listed in formula:Cl, Mo, O, Pb

Relationship of Parkinsonite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
3.DB.05Diaboleite
Pb
 
2
CuCl
 
2
(OH)
 
4
3.DB.10Pseudoboleite
Pb
 
31
Cu
 
24
Cl
 
62
(OH)
 
48
3.DB.15Boleite
KPb
 
26
Ag
 
9
Cu
 
24
(OH)
 
48
Cl
 
62
3.DB.20Cumengeite
Pb
 
21
Cu
 
20
Cl
 
42
(OH)
 
40
·6H
 
2
O
3.DB.25Bideauxite
Pb
 
2
Ag[(F,OH)
 
2
|Cl
 
3
]
3.DB.30Chloroxiphite
Pb
 
3
CuO
 
2
Cl
 
2
(OH)
 
2
3.DB.35Hematophanite
Pb
 
4
Fe
 
3
O
 
8
(OH,Cl)
3.DB.40Asisite
Pb
 
7
[O
 
4
|SiO
 
4
|Cl
 
2
]
3.DB.45Murdochite
PbCu
 
6
O
 
8-x
(Cl,Br)
 
2x
 x<=0.5
3.DB.50Yedlinite
Pb
 
6
(Cl,OH)
 
6
Cr
3+
 
(OH,O)
 
8

Other Names for Parkinsonite

Synonyms:
IMA1991-030
Other Languages:
German:Parkinsonit
Spanish:Parkinsonita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Parkinsonite

Reference List:Symes, R. F., Cressey, G., Criddle, 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: 59-68.

New Minerals (1997), New Minerals 1990-1994.

Chemica Scripta: 19: 97-107.

Internet Links for Parkinsonite

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    Localities for Parkinsonite

    Hide Locality List
    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    UK
     
    • England
      • Somerset
        • Cranmore
    		Min.Mag.: 58:59-68.; Welch, M.D., Schofield, P.F., Cressey, G., and Stanley, G.J. (1996). Cation ordering in lead-molybdenum-vanadium oxychlorides. American Mineralogist, vol. 81, pp 1350-1359.
        • Westbury on Trym
    		BMS Database; Min.Mag.: 58:59-68 (1994).
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 9th Nov 2009 22:42:15