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Petfordite
A valid IMA mineral species - pending publication
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Formula:
ZrW6+2O7(OH)2(H2O)2
Crystal System:
Tetragonal
Isostructural with:
The tungsten analogue of kingsgateite
structure determined
structure determined
Unique Identifiers
Mindat ID:
500199
Long-form identifier:
mindat:1:1:500199:2
IMA Classification of Petfordite
Approved, Pending publication
Classification of Petfordite
4.DM.
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
M : With large (+- medium-sized) cations; unclassified
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
M : With large (+- medium-sized) cations; unclassified
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 |
|---|---|---|
| Ptf | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Chemistry of Petfordite
Mindat Formula:
ZrW6+2O7(OH)2(H2O)2
Element Weights:
Elements listed:
Crystallography of Petfordite
Crystal System:
Tetragonal
Class (H-M):
4mm - Ditetragonal Pyramidal
Space Group:
I41cd
Cell Parameters:
a = 11.4169(3) Å, c = 12.4942(9) Å
Ratio:
a:c = 1 : 1.094
Unit Cell V:
1,628.56 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.72 Å | (75) |
| 4.23 Å | (90) |
| 3.618 Å | (88) |
| 3.135 Å | (100) |
| 2.600 Å | (36) |
| 2.486 Å | (42) |
| 1.906 Å | (37) |
| 1.734 Å | (37) |
Type Occurrence of Petfordite
Place of Conservation of Type Material:
Cotype material is deposited in the collections of the South Australian Museum, North Terrace, Adelaide, SA 5000, Australia, registration numbers G35468 and G35469
Related Minerals - Strunz-mindat Grouping
| 4.DM. | Sugarwhiteite | Pb2Te5O12 |
| 4.DM. | Zuolinite | Ba2Sr(Nb4.5Fe3+0.5)O15 |
| 4.DM. | Bahariyaite | KMnO4 |
| 4.DM.05 | Rankamaite | (Na,K)3(Ta,Nb,Al)11(O,OH)31 |
| 4.DM.05 | Sosedkoite | (K,Na)5Al2(Ta,Nb)22O60 |
| 4.DM.15 | Cesplumtantite | (Cs,Na)2(Pb,Sb3+)3Ta8O24 |
| 4.DM.20 | Eyselite | Fe3+Ge4+3O7(OH) |
| 4.DM.25 | Konzettite | CaMn4+Te6+O6 |
| 4.DM.25 | Kuranakhite | PbMn4+Te6+O6 |
| 4.DM.30 | Mambertiite | BiMo5+2.80O8(OH) |
| 4.DM.30 | Gelosaite | BiMo6+(2-5x)Mo5+6xO7(OH) · H2O |
| 4.DM.35 | Ekebergite | ThFeNb2O8 |
| 4.DM.45 | Riesite | TiO2 |
| 4.DM.50 | Sardignaite | BiMo2O7(OH) · 2H2O |
| 4.DM.55 | Tewite | (K1.5◻0.5)(Te1.25W0.25◻0.5)W5O19 |
| 4.DM.60 | Wumuite | K(W2.67Al0.33)O9 |
| 4.DM.60 | Kingsgateite | ZrMo6+2O7(OH)2 · 2H2O |
| 4.DM.60 | Morningstarite | Na(W2.67Fe3+0.33)O9 · H2O |
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 Petfordite
mindat.org URL:
https://www.mindat.org/min-500199.html
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References for Petfordite
Localities for Petfordite
Showing 1 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.
Australia (TL) | |
| Elliott et al. (2026) |
