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Parkinsonite

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About ParkinsoniteHide

Formula:
Pb7MoO9Cl2
Colour:
Red to purplish-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.
The Mo-dominant analogue of janchevite.


Classification of ParkinsoniteHide

Approved
Approval Year:
1991
3/D.10-150
3.DB.40

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

Pronounciation of ParkinsoniteHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of ParkinsoniteHide

Adamantine, Resinous, Pearly
Transparency:
Translucent
Colour:
Red to purplish-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
Density:
7.32 g/cm3 (Measured)    7.39 g/cm3 (Calculated)

Optical Data of ParkinsoniteHide

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.
Surface Relief:
Very High
Type:
Anisotropic
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

Chemical Properties of ParkinsoniteHide

Formula:
Pb7MoO9Cl2
IMA Formula:
Pb7MoO9Cl2

Crystallography of ParkinsoniteHide

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

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.983 (100)
2.816 (78)
1.989 (75)
1.658 (51)
1.586 (33)
3.507 (32)
1.263 (24)

Type Occurrence of ParkinsoniteHide

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.

Synonyms of ParkinsoniteHide

Other Language Names for ParkinsoniteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Mendipite9 photos of Parkinsonite associated with Mendipite on mindat.org.
Plumboan Aragonite4 photos of Parkinsonite associated with Plumboan Aragonite on mindat.org.
Mereheadite3 photos of Parkinsonite associated with Mereheadite on mindat.org.
Diaboleite3 photos of Parkinsonite associated with Diaboleite on mindat.org.
Chloroxiphite3 photos of Parkinsonite associated with Chloroxiphite on mindat.org.
Manganoan Calcite1 photo of Parkinsonite associated with Manganoan Calcite on mindat.org.
Calcite1 photo of Parkinsonite associated with Calcite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

3.DB.RickturneritePb7O4[Mg(OH)4](OH)Cl3Orth. mmm (2/m 2/m 2/m) : Pnma
3.DB.05DiaboleitePb2CuCl2(OH)4Tet. 4mm : P4mm
3.DB.10PseudoboleitePb31Cu24Cl62(OH)48Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm
3.DB.15BoleiteKPb26Ag9Cu24(OH)48Cl62Iso. m3m (4/m 3 2/m) : Pm3m
3.DB.20CumengeitePb21Cu20Cl42(OH)40 · 6H2OTet. 4/mmm (4/m 2/m 2/m) : I4/mmm
3.DB.25BideauxitePb2AgCl3(F,OH)2Iso. m3m (4/m 3 2/m) : Fd3m
3.DB.30ChloroxiphitePb3CuO2Cl2(OH)2Mon. 2/m : P21/m
3.DB.35HematophanitePb4Fe3O8(OH,Cl)Tet. 4/mmm (4/m 2/m 2/m)
3.DB.40AsisitePb7SiO9Cl2 Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm
3.DB.45MurdochitePbCu6O8-x(Cl,Br)2x where x<=0.5Iso. m3m (4/m 3 2/m) : Fm3m
3.DB.50YedlinitePb6Cr3+Cl6(O,OH,H2O)8Trig. 3 : R3

Other InformationHide

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

References for ParkinsoniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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, vol. 58, n° 390, 59-68.
New Minerals (1997), New Minerals 1990-1994.
Lepore, G.O. and Welch, M.D. (2010) The crystal structure of parkinsonite, nominally Pb7MoO9Cl2: a naturally occurring Aurivillius phase. Mineralogical Magazine: 74: 269-275.
Chemica Scripta: 19: 97-107.

Internet Links for ParkinsoniteHide

Localities for ParkinsoniteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
UK (TL)
 
  • England
    • Bristol
      • Westbury on Trym
BMS Database; 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, vol. 58, n° 390, 59-68.; Rumsey, M.S. (2008) The first British occurrence of Kombatite, Pb14(VO4)2O9Cl4, from the "Wesley Mine" near Westbury on Trym, Bristol. Journal of the Russell Society, vol. 11, 51-53.
    • Somerset
      • Cranmore
Mineralogical Magazine: 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; Welch, M.D. and Lepore, G.O. (2010). The crystal structure of parkinsonite, nominally Pb7MoO9Cl2: a naturally occurring Aurivillius phase. Mineralogical Magazine, 74, 269-275. Turner, R.W. and Rumsey, M.S. (2010): Mineral Relationships in the Mendip Hills. Journal of the Russell Society, vol 13, pp 3-46;
USA
 
  • Arizona
    • Maricopa Co.
      • Painted Rock Mts
        • Painted Rock District
          • Theba
PXRD analyzed by Tony Kampf.; Bruce Murphy Collection
Mineral and/or Locality  
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