Petewilliamsite
A valid IMA mineral species
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About Petewilliamsite
Pete Williams
Formula:
(Ni,Co)30(As2O7)15
Colour:
Dark violet-red to dark brownish red
Lustre:
Vitreous
Specific Gravity:
4.904
Crystal System:
Monoclinic
Name:
Honouring Prof. Peter A. Williams (b. 1950) of the University of Western Sydney, Australia, for his contributions to the study of secondary minerals.
Type Locality:
This page provides mineralogical data about Petewilliamsite.
Unique Identifiers
Mindat ID:
26522
Long-form identifier:
mindat:1:1:26522:3
IMA Classification of Petewilliamsite
Classification of Petewilliamsite
8.FA.25
8 : PHOSPHATES, ARSENATES, VANADATES
F : Polyphosphates, Polyarsenates, [4]-Polyvanadates
A : Polyphosphates, etc., without OH and H2O; dimers of corner-sharing RO4 tetrahedra.
8 : PHOSPHATES, ARSENATES, VANADATES
F : Polyphosphates, Polyarsenates, [4]-Polyvanadates
A : Polyphosphates, etc., without OH and H2O; dimers of corner-sharing RO4 tetrahedra.
Dana 7th ed.:
39.1.10.1
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 for Standard |
|---|---|---|
| Pwi | 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 Petewilliamsite
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon Ralph | United Kingdom |
Physical Properties of Petewilliamsite
Vitreous
Transparency:
Translucent
Colour:
Dark violet-red to dark brownish red
Density:
4.904 g/cm3 (Measured)
Chemistry of Petewilliamsite
Mindat Formula:
(Ni,Co)30(As2O7)15
Element Weights:
Elements listed:
Common Impurities:
Ca,Cu,Fe
Crystallography of Petewilliamsite
Crystal System:
Monoclinic
Class (H-M):
2 - Sphenoidal
Space Group:
B2
Cell Parameters:
a = 33.256 Å, b = 8.482 Å, c = 14.191 Å
β = 104.145°
β = 104.145°
Ratio:
a:b:c = 3.921 : 1 : 1.673
Unit Cell V:
3881.6 ų
Z:
2
Crystal Structure
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Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0014571 | Petewilliamsite | Roberts A C, Burns P C, Gault R A, Criddle A J, Feinglos M N (2004) Petewilliamsite, (Ni,Co)30(As2O7)15, a new mineral from Johanngeorgenstadt, Saxony, Germany: description and crystal structure Mineralogical Magazine 68 231-240 |  | 2004 | Johanngeorgenstadt, Saxony, Germany | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.235 Å | (30) |
| 3.118 Å | (100) |
| 3.005 Å | (60) |
| 2.567 Å | (50) |
| 1.637 Å | (50) |
| 1.507 Å | (30) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47d : [Arsenates, antimonates, selenates, bismuthinates] | |
| 47h : [Near-surface oxidized, dehydrated minerals] |
Type Occurrence of Petewilliamsite
General Appearance of Type Material:
Scattered patches of mm-sized aggregates, consisting of crystals with an average size of 20 µm to 0.3 mm.
Place of Conservation of Type Material:
Systematic Reference Series of the National Mineral Collection, Geological Survey of Canada, Ottawa, Ontario (#68097).
Natural History Museum, London, England; B 2003, 6.
Natural History Museum, London, England; B 2003, 6.
Geological Setting of Type Material:
In nickeline-veined quartz.
Associated Minerals at Type Locality:
Synonyms of Petewilliamsite
Other Language Names for Petewilliamsite
Common Associates
Associations Based on Photo Data:
| 1 photo of Petewilliamsite associated with Aerugite | Ni8.5(AsO4)2As5+O8 |
| 1 photo of Petewilliamsite associated with Xanthiosite | Ni3(AsO4)2 |
Related Minerals - Strunz-mindat Grouping
| 8.FA. | Phosphocyclite-(Fe) | Fe2+2(P4O12) |
| 8.FA. | Phosphocyclite-(Ni) | Ni2(P4O12) |
| 8.FA. | Grahampearsonite | Ca2P2O7 |
| 8.FA. | Bakakinite | Ca2V2O7 |
| 8.FA. | Lisanite | CaNiP2O7 |
| 8.FA. | Shasuite | CaNi3(P2O7)2 |
| 8.FA. | Nabateaite | Fe2P2O7 |
| 8.FA. | Samraite | Ni2P2O7 |
| 8.FA. | Anastasenkoite | CaFe2+(P2O7) |
| 8.FA.05 | Blossite | α-Cu2(V2O7) |
| 8.FA.10 | Ziesite | β-Cu2(V2O7) |
| 8.FA.15 | 'UM1999-17:O:PbV' | Pb4V2O9 or Pb4(VO4)2O |
| 8.FA.15 | Chervetite | Pb2(V2O7) |
| 8.FA.20 | Yamhamelachite | KCrP2O7 |
| 8.FA.20 | 'Pyrocoproite' | (K,Na)2Mg(P2O7) |
| 8.FA.20 | 'Pyrophosphite' | K2Ca(P2O7) |
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 Petewilliamsite
mindat.org URL:
https://www.mindat.org/min-26522.html
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References for Petewilliamsite
Localities for Petewilliamsite
Showing 4 localities.
symbol to view information about a locality.
The 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).
All localities listed without proper references should be considered as questionable.
France | |
| www.geoforum.fr (n.d.) +1 other reference |
Germany (TL) | |
| Roberts et al. (2004) |
Italy | |
| Caboni et al. (2018) |
Spain | |
| Calvo Rebollar et al. (2022) |
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Johanngeorgenstadt, Erzgebirgskreis, Saxony, Germany