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About PetterditeHide

William Frederick Petterd
PbCr3+2(CO3)2(OH)4 · H2O
Specific Gravity:
3.97 (Calculated)
Crystal System:
The name petterdite was first used by Twelvetrees for a mineral that was later shown to be a P-bearing mimetite, and hence discredited (see Petterdite (of Twelvetrees).

This mineral was named by W.D. Birch, U. Kolitsch, T. Witzke, L. Nasdala, and R.S. Bottrill in 2000 in honor of William Frederick Petterd (13 July 1849, Hobart Town, Tasmania, Australia - 15 April 1910, Launceston, Tasmania, Australia), boot importer and scientist. He published many papers on conchology and geology and wrote the Catalogue of the Minerals of Tasmania. He also described dundasite, the Al analogue of this mineral.
The Cr(III) analogue of dundasite.
See also Unnamed (Ca-analogue of petterdite).

Classification of PetterditeHide

First Published:

D : Carbonates with additional anions, with H2O
B : With large and medium-sized cations

Physical Properties of PetterditeHide

Violet, pale
Fair parallel to {100} also possibly {010}
3.97 g/cm3 (Calculated)

Optical Data of PetterditeHide

Biaxial (-)
RI values:
nα = 1.704 nβ = 1.802 nγ = 1.842
Max Birefringence:
δ = 0.138
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
r > v weak

Chemical Properties of PetterditeHide

PbCr3+2(CO3)2(OH)4 · H2O
IMA Formula:
PbCr2(CO3)2(OH)4 · H2O

Crystallography of PetterditeHide

Crystal System:
Cell Parameters:
a = 9.079(3) Å, b = 16.321(9) Å, c = 5.786(7) Å
a:b:c = 0.556 : 1 : 0.355
Unit Cell V:
857.36 ų (Calculated from Unit Cell)

Type Occurrence of PetterditeHide

General Appearance of Type Material:
Earthy, pale purplish mineral in crocoite-bearing gossan.
Place of Conservation of Type Material:
Museum Victoria, Melbourne, Australia, M38601.

Synonyms of PetterditeHide

Other Language Names for PetterditeHide


Relationship of Petterdite to other SpeciesHide

Other Members of this group:
AlumohydrocalciteCaAl2(CO3)2(OH)4 · 4H2OTric. 1 : P1
DresseriteBaAl2(CO3)2(OH)4 · H2OOrth. mmm (2/m 2/m 2/m)
DundasitePbAl2(CO3)2(OH)4 · H2OOrth. mmm (2/m 2/m 2/m)
GrguriciteCaCr2(CO3)2(OH)4•4H2OTric. 1 : P1
HydrodresseriteBaAl2(CO3)2(OH)4 · 3H2OTric.
KochsándoriteCaAl2(CO3)2(OH)4 · H2OOrth. mmm (2/m 2/m 2/m) : Pnma
StrontiodresseriteSrAl2(CO3)2(OH)4 · H2OOrth.
Unnamed (Ca-analogue of Petterdite)CaCr3+2(CO3)2(OH)4 · H2O

Common AssociatesHide

Associated Minerals Based on Photo Data:
4 photos of Petterdite associated with CerussitePbCO3
3 photos of Petterdite associated with CrocoitePbCrO4
3 photos of Petterdite associated with AnglesitePbSO4
1 photo of Petterdite associated with PhilipsbornitePbAl3(AsO4)(AsO3OH)(OH)6
1 photo of Petterdite associated with Chrome-CerussitePbCO3
1 photo of Petterdite associated with GalenaPbS

Related Minerals - Nickel-Strunz GroupingHide

5.DB.05AlumohydrocalciteCaAl2(CO3)2(OH)4 · 4H2OTric. 1 : P1
5.DB.05NasledovitePbMn3Al4(CO3)4(SO4)O5 · 5H2O
5.DB.05Para-alumohydrocalciteCaAl2(CO3)2(OH)4 · 6H2O
5.DB.05UM1977-02-CO:AlCaHCa6Al2(CO3)3O6 · 32H2O
5.DB.10DresseriteBaAl2(CO3)2(OH)4 · H2OOrth. mmm (2/m 2/m 2/m)
5.DB.10DundasitePbAl2(CO3)2(OH)4 · H2OOrth. mmm (2/m 2/m 2/m)
5.DB.10MontroyaliteSr4Al8(CO3)3(OH,F)26 · 10-11H2OTric.
5.DB.10StrontiodresseriteSrAl2(CO3)2(OH)4 · H2OOrth.
5.DB.10KochsándoriteCaAl2(CO3)2(OH)4 · H2OOrth. mmm (2/m 2/m 2/m) : Pnma
5.DB.15HydrodresseriteBaAl2(CO3)2(OH)4 · 3H2OTric.
5.DB.20Schuilingite-(Nd)PbCu(Nd,Gd,Sm,Y)(CO3)3(OH) · 1.5H2OOrth. mm2

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 PetterditeHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Birch, W.D., Kolitsch, U., Witzke, T., Nasdala, L., Bottrill, R.S. (2000) Petterdite, the Cr-dominant analogue of dundasite: a new mineral species from Dundas, Tasmania, Australia and Callenberg, Saxony, Germany. Canadian Mineralogist: 38: 1467-1476.

Internet Links for PetterditeHide

Localities for PetterditeHide

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.
Australia (TL)
  • Tasmania
    • West Coast municipality
      • Zeehan district
        • Dundas mineral field
Birch, W.D., Kolitsch, U., Witzke, T., Nasdala, L. & Bottrill, R.S. 2001, Petterdite, the Cr-dominant analogue of dundasite, a new mineral species from Dundas, Tasmania, Australia and Callenberg, Saxony, Germany. Canadian Mineral., v. 38, p. 1467-1476.; Kampf, A. R., Mills, S. J., Housley, R. M., Bottrill, R. S., & Kolitsch, U. (2012). Reynoldsite, Pb2Mn4+ 2 O5 (CrO4), a new phyllomanganate-chromate from the Blue Bell claims, California and the Red Lead mine, Tasmania. American Mineralogist, 97(7), 1187-1192.
  • Saxony
    • Zwickau
      • Glauchau
        • Callenberg
[MinRec 33:166]
Mineral and/or Locality  
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