Priderite
A valid IMA mineral species - grandfathered
This page is currently not sponsored. Click here to sponsor this page.
About Priderite
Rex T. Prider
Formula:
K(Ti4+7Fe3+)O16
May contain minor Ba replacing K.
Colour:
Reddish to black
Lustre:
Adamantine
Hardness:
7
Specific Gravity:
3.86
Crystal System:
Tetragonal
Member of:
Name:
Named in 1951 by Keith Norrish in honor of Rex Tregilgas Prider (22 September 1910, Narrogin, Western Australia - 6 October 2005, Perth, Western Australia), Professor of Geology at the University of Western Australia. He studied the leucite lamproites of the northern Canning Basin, work that eventually led to the development of the Kimberley diamond mining region. He also served as President of the Geological Society of Australia.
The Ti analogue of UM1994-09-O:CrKTi. Also the Fe(III) analogue of kopernikite (named after Mikołaj Kopernik a.k.a. Nicolaus Copernicus).
Unique Identifiers
Mindat ID:
3282
Long-form identifier:
mindat:1:1:3282:3
IMA Classification of Priderite
Approved, 'Grandfathered' (first described prior to 1959)
First published:
1951
Classification of Priderite
4.DK.05b
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
K : With large (+- medium-sized) cations; tunnel structures
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
K : With large (+- medium-sized) cations; tunnel structures
7.9.4.1
7 : MULTIPLE OXIDES
9 : AB8X16
7 : MULTIPLE OXIDES
9 : AB8X16
7.9.27
7 : Oxides and Hydroxides
9 : Oxides of Ti
7 : Oxides and Hydroxides
9 : Oxides of Ti
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Pdr | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Pdr | Warr (2020) | Warr, L.N. (2020) Recommended abbreviations for the names of clay minerals and associated phases. Clay Minerals, 55, 261–264 doi:10.1180/clm.2020.30 |
Physical Properties of Priderite
Adamantine
Transparency:
Translucent
Colour:
Reddish to black
Streak:
Grey
Hardness:
7 on Mohs scale
Hardness:
VHN100=161 - Vickers
Cleavage:
Perfect
Basal - perfect
Prismatic - good
Basal - perfect
Prismatic - good
Fracture:
Conchoidal
Density:
3.86(6) g/cm3 (Measured) 3.948 g/cm3 (Calculated)
Optical Data of Priderite
Type:
Uniaxial (-)
Pleochroism:
Visible
Comments:
O = deep reddish brown; E = deep reddish brown to black
Comments:
ω = >2.1, ε = n.d.
Chemistry of Priderite
Mindat Formula:
K(Ti4+7Fe3+)O16
May contain minor Ba replacing K.
May contain minor Ba replacing K.
Element Weights:
Elements listed:
Common Impurities:
Ba
Crystallography of Priderite
Crystal System:
Tetragonal
Class (H-M):
4/m - Dipyramidal
Space Group:
I4/m
Cell Parameters:
a = 10.139(2) Å, c = 2.9664(9) Å
Ratio:
a:c = 1 : 0.293
Unit Cell V:
304.94 ų (Calculated from Unit Cell)
Z:
1
Morphology:
Rods, 0.5 x 1 mm.
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
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) |
|---|---|---|---|---|---|---|---|
| 0009757 | Priderite | Post J E, Von Dreele R B, Buseck P R (1982) Symmetry and cation displacements in hollandites: structure refinements of hollandite, cryptomelane and priderite Acta Crystallographica B38 1056-1065 |  | 1982 | West Kimberley, Australia | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.19 Å | (strong) |
| 7.13 Å | (moderate) |
| 5.04 Å | (moderate) |
| 2.470 Å | (moderate) |
| 1.887 Å | (moderate) |
| 1.585 Å | (moderately weak) |
| 2.222 Å | (weak) |
Comments:
West Kimberley area, Australia. Data from the type description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 35 : Ultra-alkali and agpaitic igneous rocks | |
| 36 : Carbonatites, kimberlites, and related igneous rocks | |
| Stage 5: Initiation of plate tectonics | <3.5-2.5 |
| 41 : Mantle metasomatism |
Type Occurrence of Priderite
General Appearance of Type Material:
Very similar to rutile. Minute reddish rods on the order of 0.05 mm long, and as stout prisms measuring up to 1 x 0.5 mm.
Place of Conservation of Type Material:
University of Western Australia, Perth, Australia, 18760.
The Natural History Museum, London, England.
The Natural History Museum, London, England.
Geological Setting of Type Material:
Fine grained leucite rocks.
Associated Minerals at Type Locality:
Other Language Names for Priderite
Relationship of Priderite to other Species
Member of:
Other Members of Priderite Group:
| Henrymeyerite | Ba(Ti4+7Fe2+)O16 | Tet. 4/m : I4/m |
| Kopernikite | K(Ti7Cr3+)O16 | Tet. 4/m : I4/m |
| Mannardite | Ba(Ti4+6V3+2)O16 | Tet. 4/m : I41/a |
| Redledgeite | Ba(Ti4+6Cr3+2)O16 | Tet. |
| 'UM1994-09-O:CrKTi' | Compare UM1994-07-O:BaCrFeMgTi and UM1994-08-O:CaFeKMgTi. |
Common Associates
Associations Based on Photo Data:
| 4 photos of Priderite associated with Perovskite | CaTiO3 |
| 3 photos of Priderite associated with Leucite | K(AlSi2O6) |
| 3 photos of Priderite associated with Richterite | Na(CaNa)Mg5(Si8O22)(OH)2 |
| 2 photos of Priderite associated with Celadonite | K(MgFe3+◻)(Si4O10)(OH)2 |
| 2 photos of Priderite associated with Jeppeite | K2Ti6O13 |
| 1 photo of Priderite associated with Henrymeyerite | Ba(Ti4+7Fe2+)O16 |
Related Minerals - Strunz-mindat Grouping
| 4.DK.K | Thalliomelane | Tl(Mn4+7.5Cu2+0.5)O16 |
| 4.DK. | Ferrihollandite | Ba(Mn4+6Fe3+2)O16 |
| 4.DK. | Kopernikite | K(Ti7Cr3+)O16 |
| 4.DK.4.DK. | Ferricoronadite | Pb(Mn4+6Fe3+2)O16 |
| 4.DK.05a | Manjiroite | Na(Mn4+7Mn3+)O16 |
| 4.DK.05b | Mannardite | Ba(Ti4+6V3+2)O16 |
| 4.DK.05b | Redledgeite | Ba(Ti4+6Cr3+2)O16 |
| 4.DK.05 | Akaganeite | (Fe3+,Ni2+)8(OH,O)16Cl1.25 · nH2O |
| 4.DK.05a | Coronadite | Pb(Mn4+6Mn3+2)O16 |
| 4.DK.05a | Hollandite | Ba(Mn4+6Mn3+2)O16 |
| 4.DK.05a | Cryptomelane | K(Mn4+7Mn3+)O16 |
| 4.DK.05a | Strontiomelane | Sr(Mn4+6Mn3+2)O16 |
| 4.DK.05b | Henrymeyerite | Ba(Ti4+7Fe2+)O16 |
| 4.DK.10 | Romanèchite | (Ba,H2O)2(Mn4+,Mn3+)5O10 |
| 4.DK.10 | Todorokite | (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O |
Radioactivity
Radioactivity:
| Element | % Content | Activity (Bq/kg) | Radiation Type |
|---|---|---|---|
| Uranium (U) | 0.0000% | 0 | α, β, γ |
| Thorium (Th) | 0.0000% | 0 | α, β, γ |
| Potassium (K) | 5.6994% | 1,767 | β, γ |
For comparison:
- Banana: ~15 Bq per fruit
- Granite: 1,000–3,000 Bq/kg
- EU exemption limit: 10,000 Bq/kg
Note: Risk is shown relative to daily recommended maximum exposure to non-background radiation of 1000 µSv/year. Note that natural background radiation averages around 2400 µSv/year so in reality these risks are probably extremely overstated! With infrequent handling and safe storage natural radioactive minerals do not usually pose much risk.
Interactive Simulator:
Note: The mass selector refers to the mass of radioactive mineral present, not the full specimen, also be aware that the matrix may also be radioactive, possibly more radioactive than this mineral!
Activity: –
| Distance | Dose rate | Risk |
|---|---|---|
| 1 cm | ||
| 10 cm | ||
| 1 m |
The external dose rate (D) from a radioactive mineral is estimated by summing the gamma radiation contributions from its Uranium, Thorium, and Potassium content, disregarding daughter-product which may have a significant effect in some cases (eg 'pitchblende'). This involves multiplying the activity (A, in Bq) of each element by its specific gamma ray constant (Γ), which accounts for its unique gamma emissions. The total unshielded dose at 1 cm is then scaled by the square of the distance (r, in cm) and multiplied by a shielding factor (μshield). This calculation provides a 'worst-case' or 'maximum risk' estimate because it assumes the sample is a point source and entirely neglects any self-shielding where radiation is absorbed within the mineral itself, meaning actual doses will typically be lower. The resulting dose rate (D) is expressed in microsieverts per hour (μSv/h).
D = ((AU × ΓU) + (ATh × ΓTh) + (AK × ΓK)) / r2 × μshield
Other Information
Magnetism:
Paramagnetic
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 Priderite
mindat.org URL:
https://www.mindat.org/min-3282.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Priderite
Reference List:
Norrish, K. (1951) Priderite, a new mineral from the leucite-lamproites of the west Kimberley area, Western Australia. Mineralogical Magazine and Journal of the Mineralogical Society, 29 (212) 496-501 doi:10.1180/minmag.1951.029.212.03
Norrish, K. (1951) Priderite, a new mineral from the leucite-lamproites of the west Kimberley area, Western Australia. Mineralogical Magazine and Journal of the Mineralogical Society, 29 (212) 496-501 doi:10.1180/minmag.1951.029.212.03
Velde, Danielle (1968) A new occurrence of priderite. Mineralogical Magazine and Journal of the Mineralogical Society, 36 (282) 867-870 doi:10.1180/minmag.1968.036.282.18
Post, J. E., Von Dreele, R. B., Buseck, P. R. (1982) Symmetry and cation displacements in hollandites: structure refinements of hollandite, cryptomelane and priderite. Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry, 38 (4) 1056-1065 doi:10.1107/s0567740882004968
Sinclair, W.; McLaughlin, G. M. (1982) Structure refinement of priderite. Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry, 38 (1). 245-246 doi:10.1107/s0567740882002489
Localities for Priderite
Showing 73 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.
Antarctica | |
| Andronikov et al. (2001) |
Australia | |
| Gorter et al. (2002) |
| Hwang et al. (1994) |
| Jaques et al. (1986) |
| Jaques et al. (1986) | |
| Jaques et al. (1986) | |
| Prider (1982) | |
| Jaques et al. (1986) |
| Jaques et al. (1986) | |
| Jaques et al. (1986) | |
| Prider (1939) +5 other references |
| Jaques et al. (1986) | |
| Jaques et al. (1986) | |
| Jaques et al. (1986) | |
| Jaques et al. (1986) | |
| Jaques et al. (1986) | |
| Jaques et al. (1986) | |
| Jaques et al. (1986) | |
| Jaques et al. (1986) | |
| Jaques et al. (1986) | |
| Kubel +7 other references |
Brazil | |
| MinMag 58:409 |
Canada | |
| Anton R. Chakhmouradian and Roger H. Mitchell (2001) |
| Anzolini et al. (2019) |
China | |
| Lei et al. (1998) +2 other references |
Czech Republic | |
| Naemura +3 other references |
| Krmíček et al. (2012) |
France | |
| Velde (1967) +3 other references |
| Velde (1968) | |
Germany | |
| Lippolt et al. (1976) +4 other references |
| Blaß et al. (2009) |
| Blaß et al. (2003) |
| Blaß et al. (2002) +1 other reference |
Greenland | |
| www.koeln.netsurf.de (1999) |
India | |
| Rock et al. (1992) |
| Kaur et al. (2024) | |
| Basu et al. (1997) +2 other references |
| Kaur et al. (2017) |
| Middlemost et al. (1988) +1 other reference |
| Gupta et al. (1983) +1 other reference |
Italy | |
| Piccoli et al. (2007) |
Ivory Coast | |
| Allialy et al. (2011) |
| Pouclet A. et al. (2004) |
Russia | |
| Kostrovitsky et al. (2021) |
| Mitchell et al. (1993) | |
| [World of Stones 95:5-6 |
| Pavel M. Kartashov (n.d.) | |
| [World of Stones 95:5-6 |
| Gorkovetz et al. (2012) |
| [World of Stones 12:49] | |
| Rezvukhin +3 other references |
South Africa | |
| Mitchell et al. (1989) +1 other reference |
| Kamenetsky et al. (2014) |
| Konzett et al. (2013) |
| Giuliani et al. (2012) |
Spain | |
| Dill et al. (2023) |
| Venturelli et al. (1984) +2 other references |
| Pellicer (1973) +2 other references |
| Salvioli-Mariani et al. (1996) |
| Fúster et al. (prov. de Murcia) +4 other references |
USA | |
| Grey et al. (1998) +1 other reference |
| Dummett (1987) | |
| Mertzman (1977) |
| Velde (1968) +1 other reference |
| Chakhmouradian et al. (1999) |
| Bikerman (1997) |
| Wannamaker et al. (2000) |
| Carmichael (1967) +2 other references |
| P & E Médard collection | |
| Mitchell et al. (1991) | |
| Barton | |
| Mitchell et al. (1991) | |
| Mitchell et al. (1991) |
Quick NavTopAbout PrideriteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence Other LanguagesRelationshipsCommon AssociatesStrunz-MindatRadioactivityOther InformationInternet Links References Localities Locality List
Graulay quarry, Hillesheim, Gerolstein, Vulkaneifel, Rhineland-Palatinate, Germany