Uranpyrochlore (of Hogarth 1977)
A variety of Pyrochlore Group
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About Uranpyrochlore (of Hogarth 1977)
Formula:
(Ca,U,Ce)2(Nb,Ti,Ta)2O6(OH,F)
usually is enriched by Ti, but in lesser quantities then betafites
Colour:
Red, Red-brown, chocolate-brown to black, amber-yellow
Lustre:
Adamantine, Resinous
Hardness:
4 - 5
Crystal System:
Isometric
Name:
The name reflects its uranium content and similarity to pyrochlore (Holmquist P.J., 1896).
First Recorded Locality:
Uranpyrochlore was previously considered to be the uranium-dominant member of the Pyrochlore group (Hogarth, 1977) but was discredited by Atencio et al. (2010) due to lack of acceptable analyses. The samples named as uranpyrochlore in previous literature are (according to the new nomenclature of the pyrochlore supergroup) U-rich oxynatropyrochlore.
Any new analyses confirming a U-dominant pyrochlore, according to 2010 nomenclature rules, will require a new name such as Oxyuranpyrochlore.
Any new analyses confirming a U-dominant pyrochlore, according to 2010 nomenclature rules, will require a new name such as Oxyuranpyrochlore.
Unique Identifiers
Mindat ID:
4116 (as Uranpyrochlore (of Hogarth 1977))
3316 (as Pyrochlore Group)
3316 (as Pyrochlore Group)
Long-form identifier:
mindat:1:1:4116:0 (as Uranpyrochlore (of Hogarth 1977))
mindat:1:1:3316:5 (as Pyrochlore Group)
mindat:1:1:3316:5 (as Pyrochlore Group)
IMA Classification of Uranpyrochlore (of Hogarth 1977)
Discredited
Classification of Uranpyrochlore (of Hogarth 1977)
8.2.1.7
8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
2 : A2B2O6(O,OH,F)
8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
2 : A2B2O6(O,OH,F)
18.4.1
18 : Niobates and Tantalates
4 : Niobates and tantalates containing both U and rare earths
18 : Niobates and Tantalates
4 : Niobates and tantalates containing both U and rare earths
Physical Properties of Uranpyrochlore (of Hogarth 1977)
Adamantine, Resinous
Colour:
Red, Red-brown, chocolate-brown to black, amber-yellow
Hardness:
4 - 5 on Mohs scale
Optical Data of Uranpyrochlore (of Hogarth 1977)
Type:
Isotropic
Chemistry of Uranpyrochlore (of Hogarth 1977)
Mindat Formula:
(Ca,U,Ce)2(Nb,Ti,Ta)2O6(OH,F)
usually is enriched by Ti, but in lesser quantities then betafites
usually is enriched by Ti, but in lesser quantities then betafites
Element Weights:
Crystallography of Uranpyrochlore (of Hogarth 1977)
Crystal System:
Isometric
Cell Parameters:
a = 10.44 Å
Unit Cell V:
1,137.89 ų (Calculated from Unit Cell)
First Recorded Occurrence of Uranpyrochlore (of Hogarth 1977)
Synonyms of Uranpyrochlore (of Hogarth 1977)
Other Language Names for Uranpyrochlore (of Hogarth 1977)
Common Associates
Associations Based on Photo Data:
| 15 photos of Uranpyrochlore (of Hogarth 1977) associated with 'Cyrtolite' | Zr[(SiO4),(OH)4] |
| 7 photos of Uranpyrochlore (of Hogarth 1977) associated with Quartz | SiO2 |
| 6 photos of Uranpyrochlore (of Hogarth 1977) associated with Albite | Na(AlSi3O8) |
| 6 photos of Uranpyrochlore (of Hogarth 1977) associated with Microcline | K(AlSi3O8) |
| 3 photos of Uranpyrochlore (of Hogarth 1977) associated with Columbite-(Mn) | Mn2+Nb2O6 |
| 3 photos of Uranpyrochlore (of Hogarth 1977) associated with 'Smoky Quartz' | SiO2 |
| 3 photos of Uranpyrochlore (of Hogarth 1977) associated with Garnet Group | X3Z2(SiO4)3 |
| 2 photos of Uranpyrochlore (of Hogarth 1977) associated with Zircon | Zr(SiO4) |
| 2 photos of Uranpyrochlore (of Hogarth 1977) associated with Dolomite | CaMg(CO3)2 |
| 2 photos of Uranpyrochlore (of Hogarth 1977) associated with Feldspar Group |
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 Uranpyrochlore (of Hogarth 1977)
mindat.org URL:
https://www.mindat.org/min-4116.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
Mineral Dealers:
References for Uranpyrochlore (of Hogarth 1977)
Reference List:
Hogarth, D. D. (1977) Classification and nomenclature of the pyrochlore group. American Mineralogist, 62 (5-6) 403-410
Localities for Uranpyrochlore (of Hogarth 1977)
Showing 108 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.
Afghanistan | |
| Orris et al. (2002) |
Argentina | |
| Bardelli et al. (2018) |
Austria | |
| Niedermayr et al. (1995) |
Brazil | |
| Bastos Neto et al. (2009) |
| Beurlen et al. (2005) |
| Beurlen et al. (2005) |
| Beurlen et al. (2005) | |
| Robinson et al. (1998) | |
| Menezes et al. (1984) |
Canada | |
| Blue River Carbonatites et al. (http://www.commerceresources.com/i/pdf/05-BCGOVRREPORT.pdf) |
| Masau et al. (2002) |
| Grice (1989) |
| www.geologyontario.mndm.gov.on.ca (n.d.) |
| Betts (n.d.) |
| www.geologyontario.mndm.gov.on.ca (n.d.) |
| Hewitt D.F. (1954) +1 other reference | |
| American Mineralogist 27:226 +3 other references | |
| www.geologyontario.mndm.gov.on.ca (n.d.) | |
| www.geologyontario.mndm.gov.on.ca (n.d.) | |
| Hewitt D.F. (1967) | |
| Berger et al. (2009) |
| Zurevinski et al. (2004) |
| Zurevinski et al. (2004) | |
| SASSANO et al. (1987) |
China | |
| - (1978) |
| - (1978) +3 other references | |
| Hui et al. (2025) |
| Huang et al. (2022) |
Czech Republic | |
| Pauliš P. et al. (Kutna Hora, issue 1) |
| Novák |
| Pauliš P. et al. (Kutna Hora, issue 1) |
| Škoda et al. (2004) |
Egypt | |
| Abd El-Naby (2008) |
| Helmy | |
| Ali et al. (2021) | |
| Raslan et al. (2011) |
Finland | |
| Vartiainen (1980) |
France | |
| Wang et al. (1994) |
| a possible case of evolution through volatile transfer. Bulletin de la Société Géologique de France (5) +4 other references |
| Eugene Foord |
| MONCHOUX P. et al. (2006) |
Germany | |
| Weiß (1990) |
| Keck (1989) |
| Blaß et al. (2001) |
| Blaß et al. (2002) | |
| Blaß et al. (2001) | |
| Blaß et al. (2001) |
| Blaß et al. (2001) |
Greenland | |
| Petersen et al. (1993) |
Italy | |
| Fedele L. et al. (2006) |
| Voltaggio M. (1995) |
| - (n.d.) |
| |
| - (n.d.) |
Madagascar | |
| Behier (1963) |
| Lacroix (1908) | |
| Knut Edvard Larsen collection (XRD, metamict + SEM identified) |
| RRUFF specimen R060165 | |
| Lacroix (1922) | |
| Lacroix (1912) +3 other references |
Malawi | |
| Orris et al. (2002) |
Myanmar | |
| Pavel M. Kartashov analytical data 2018 |
Namibia | |
| Chen et al. (2025) |
| Orris et al. (2002) |
Norway | |
| Hawthorne et al. (1991) |
| Vokes (1960) +1 other reference |
| Bjørlykke et al. (1960) | |
| Størseth (2019) |
Paraguay | |
| Woolley (1987) |
Poland | |
| Łodziński M. & Pieczka A. (2008) |
| PIECZKA et al. 2010: Nb-Ta minerals in ... |
Romania | |
| Szakáll et al. (2010) |
| HÎRTOPANU et al. (2014) |
Russia | |
| Nedosekova (2007) |
| Seltmann et al. (2010) |
| Liferovich et al. (1998) +1 other reference |
| ... | |
| Pavel M. Kartashov (n.d.) | |
| Pavel M. Kartashov (n.d.) |
Slovakia | |
| Uher |
South Africa | |
| R. Liferovich -L. Horváth p.c. 2004 |
Sweden | |
| |
Uganda | |
| Hogarth et al. (1989) |
Ukraine | |
| Orris et al. (2002) |
| Ryabchikov et al. (2008) |
| Pavel M. Kartashov (n.d.) |
USA | |
| - (2008) |
| Ralph Parkes |
| Eckel et al. (1997) |
| Eckel et al. (1997) |
| Eckel et al. (1997) | |
| |
| Rudy Boloña identification and ... |
| Specimen in collection of Andrew Kruegel +1 other reference |
| Rocks and Minerals (1990) |
| Am Min 1953 p1090 |
| Michael N. Spilde et al. (2011) |
| Northrop et al. (1996) | |
| Jahns (1946) +1 other reference |
| Northrop et al. (1996) |
| Joseph A.Mandarino and Malcolm E. Back |
| 8th Dana |
| Genth |
| Genth |
| Pegau (1932) +1 other reference |
| Cordura |
| www.uwrf.edu/~wc01/pyrochlore.htm |
Vietnam | |
| Feldman l.G. et al. (1987) +4 other references |
Phenakite Mine, Khetchel village, Molo quarter, Momeik Township, Kyaukme District, Shan State, Myanmar