Francevillite
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About Francevillite
Formula:
Ba(UO2)2(VO4)2 · 5H2O
Hardness:
3
Crystal System:
Orthorhombic
Member of:
Name:
Named in 1957 by G. Branche, M.E. Ropert, F. Chantret, B. Morignat, and R. Pouget for Franceville, the city nearest the type locality.
Classification of Francevillite
Approved, 'Grandfathered' (first described prior to 1959)
7/E.11-100
4.HB.15
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
B : Uranyl Sorovanodates
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
B : Uranyl Sorovanodates
40.2a.27.1
40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2a : AB2(XO4)2·xH2O, containing (UO2)2+
40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2a : AB2(XO4)2·xH2O, containing (UO2)2+
21.4.10
21 : Vanadates (and vanadates with arsenate or phosphate)
4 : Vanadates of U, Mn, Fe or Ni
21 : Vanadates (and vanadates with arsenate or phosphate)
4 : Vanadates of U, Mn, Fe or Ni
Physical Properties of Francevillite
Hardness:
3 on Mohs scale
Optical Data of Francevillite
Type:
Biaxial (-)
RI values:
nα = 1.750 - 1.785 nβ = 1.910 - 1.952 nγ = 1.945 - 2.002
2V:
Measured: 52° , Calculated: 46° to 52°
Max Birefringence:
δ = 0.195 - 0.217

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
strong
Chemical Properties of Francevillite
Formula:
Ba(UO2)2(VO4)2 · 5H2O
Crystallography of Francevillite
Crystal System:
Orthorhombic
Cell Parameters:
a = 10.41 Å, b = 8.51 Å, c = 16.76 Å
Ratio:
a:b:c = 1.223 : 1 : 1.969
Unit Cell V:
1,484.75 ų (Calculated from Unit Cell)
Crystal Structure
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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) |
---|---|---|---|---|---|---|---|
0014806 | Francevillite | Mereiter K (1986) Crystal structure refinement of two francevillites, (Ba,Pb)[(UO2)2V2O8]*5H2O Neues Jahrbuch fur Mineralogie, Monatshefte 1986 552-560 | 1986 | Mounana, near Franceville, Gabon | 0 | 293 | |
0014807 | Francevillite | Mereiter K (1986) Crystal structure refinement of two francevillites, (Ba,Pb)[(UO2)2V2O8]*5H2O Neues Jahrbuch fur Mineralogie, Monatshefte 1986 552-560 | 1986 | Mounana, near Franceville, Gabon | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
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Radiation - Copper Kα
Data courtesy of RRUFF project at University of Arizona, used with permission.
Type Occurrence of Francevillite
Synonyms of Francevillite
Other Language Names for Francevillite
Relationship of Francevillite to other Species
Member of:
Other Members of this group:
Curienite | Pb(UO2)2(VO4)2 · 5H2O | Orth. |
Fritzscheite | Mn(UO2)2(PO4,VO4)2 · 10H2O (?) | Tet. |
Chemically related to group(s):
Carnotite Group | A group of metal-uranyl vanadates. |
Forms a series with:
Common Associates
Associated Minerals Based on Photo Data:
41 photos of Francevillite associated with Curienite | Pb(UO2)2(VO4)2 · 5H2O |
30 photos of Francevillite associated with Chervetite | Pb2(V2O7) |
16 photos of Francevillite associated with Mounanaite | PbFe3+2(VO4)2(OH,F)2 |
3 photos of Francevillite associated with Carnotite | K2(UO2)2(VO4)2 · 3H2O |
2 photos of Francevillite associated with Autunite | Ca(UO2)2(PO4)2 · 10-12H2O |
2 photos of Francevillite associated with Selenium | Se |
2 photos of Francevillite associated with Straczekite | (Ca,K,Ba)(V5+,V4+)8O20 · 3H2O |
1 photo of Francevillite associated with Schubnelite | Fe3+VO4 · H2O |
1 photo of Francevillite associated with Bariopharmacosiderite | Ba0.5Fe3+4(AsO4)3(OH)4 · 5H2O |
1 photo of Francevillite associated with Bariandite | Al0.6(V5+,V4+)8O20 · 9H2O |
Related Minerals - Nickel-Strunz Grouping
4.HB.05 | Carnotite | K2(UO2)2(VO4)2 · 3H2O | Mon. 2/m : P21/b |
4.HB.05 | Margaritasite | (Cs,K,H3O)2(UO2)2(VO4)2 · H2O | Mon. 2/m : P21/b |
4.HB.10 | Sengierite | Cu2(UO2)2(VO4)2 · 6H2O | Mon. 2/m : P21/b |
4.HB.15 | Curienite | Pb(UO2)2(VO4)2 · 5H2O | Orth. |
4.HB.15 | Fritzscheite | Mn(UO2)2(PO4,VO4)2 · 10H2O (?) | Tet. |
4.HB.20 | Metavanuralite | Al(UO2)2(VO4)2(OH) · 8H2O | Tric. |
4.HB.20 | Vanuralite | Al(UO2)2(V2O8)(OH) · 11H2O | Mon. |
4.HB.25 | Metatyuyamunite | Ca(UO2)2(VO4)2 · 3H2O | Orth. mmm (2/m 2/m 2/m) |
4.HB.25 | Tyuyamunite | Ca(UO2)2(VO4)2 · 5-8H2O | Orth. mmm (2/m 2/m 2/m) : Pnna |
4.HB.30 | Strelkinite | Na2(UO2)2(VO4)2 · 6H2O | Orth. |
4.HB.35 | Uvanite | U6+2V5+6O21 · 15H2O (?) | Orth. |
4.HB.40 | Rauvite | Ca(UO2)2(V10O28) · 16H2O |
Related Minerals - Dana Grouping (8th Ed.)
40.2a.27.2 | Curienite | Pb(UO2)2(VO4)2 · 5H2O | Orth. |
Related Minerals - Hey's Chemical Index of Minerals Grouping
21.4.1 | Uvanite | U6+2V5+6O21 · 15H2O (?) | Orth. |
21.4.2 | Vanuranylite | (H3O)2(UO2)2(VO4)2 · 4H2O | |
21.4.3 | Strelkinite | Na2(UO2)2(VO4)2 · 6H2O | Orth. |
21.4.4 | Carnotite | K2(UO2)2(VO4)2 · 3H2O | Mon. 2/m : P21/b |
21.4.5 | Margaritasite | (Cs,K,H3O)2(UO2)2(VO4)2 · H2O | Mon. 2/m : P21/b |
21.4.6 | Sengierite | Cu2(UO2)2(VO4)2 · 6H2O | Mon. 2/m : P21/b |
21.4.7 | Metatyuyamunite | Ca(UO2)2(VO4)2 · 3H2O | Orth. mmm (2/m 2/m 2/m) |
21.4.8 | Tyuyamunite | Ca(UO2)2(VO4)2 · 5-8H2O | Orth. mmm (2/m 2/m 2/m) : Pnna |
21.4.9 | Rauvite | Ca(UO2)2(V10O28) · 16H2O | |
21.4.11 | Metavanuralite | Al(UO2)2(VO4)2(OH) · 8H2O | Tric. |
21.4.12 | Vanuralite | Al(UO2)2(V2O8)(OH) · 11H2O | Mon. |
21.4.13 | Curienite | Pb(UO2)2(VO4)2 · 5H2O | Orth. |
21.4.14 | Fritzscheite | Mn(UO2)2(PO4,VO4)2 · 10H2O (?) | Tet. |
21.4.15 | Palenzonaite | (NaCa2)Mn2+2(VO4)3 | Iso. m3m (4/m 3 2/m) : Ia3d |
21.4.16 | Santafeite | (Na,Ca,Sr)12(Mn2+,Fe3+,Al,Mg)8Mn4+8(VO4)16(OH,O)20 · 8H2O | Orth. mmm (2/m 2/m 2/m) |
21.4.17 | Pyrobelonite | PbMn2+(VO4)(OH) | Orth. mmm (2/m 2/m 2/m) : Pnma |
21.4.18 | Brackebuschite | Pb2Mn3+(VO4)2(OH) | Mon. 2/m : P21/m |
21.4.19 | Čechite | PbFe2+(VO4)(OH) | Orth. mmm (2/m 2/m 2/m) |
21.4.20 | Heyite | Pb5Fe2+2(VO4)2O4 | Mon. |
21.4.21 | Mounanaite | PbFe3+2(VO4)2(OH,F)2 | Mon. 2/m : B2/m |
21.4.22 | Schubnelite | Fe3+VO4 · H2O | Tric. |
21.4.23 | Fervanite | Fe3+4V5+4O16 · 5H2O | Mon. |
21.4.24 | Kazakhstanite | Fe3+5V4+3V5+12O39(OH)9 · 9H2O | Mon. |
21.4.25 | Bokite | (Al,Fe3+)1.3(V5+,V4+,Fe3+)8O20 · 7.4H2O | Mon. |
21.4.26 | Rusakovite | (Fe3+,Al)5(VO4,PO4)2(OH)9 · 3H2O | |
21.4.27 | Kolovratite | NixZny(VO4)0.67(x+y) · nH2O |
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.
References for Francevillite
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Branche, G., Ropert, M.E., Chantret, F., Morignat, B., Pouget, R. (1957) La francevillite, nouveau minéral uranifère. Comptes Rendus Hebdomadaires des Séances de l’Académie des Sciences: 245: 89-91. (in French)
Fleischer, M. (1958) New mineral names. American Mineralogist: 43: 180.
Mereiter, K. (1986) Crystal structure refinements of two francevillites, (Ba,Pb)[(UO2)2V2O8]·5H2O. Neues Jahrbuch für Mineralogie, Monatshefte: 552-560.
Burns, P.C. (2005) U 6+ minerals and inorganic compounds: insights into an expanded structural hierarchy of crystal structures. Canadian Mineralogist: 43: 1839-1894.
Internet Links for Francevillite
mindat.org URL:
https://www.mindat.org/min-1589.html
Please feel free to link to this page.
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External Links:
Mineral Dealers:
Localities for Francevillite
Locality List




All localities listed without proper references should be considered as questionable.
Australia | |
| Henry, D.A., Pogson, R.E. and Williams, P.A. (2005) Threadgoldite from the South Alligator Valley uranium field, Northern Territory, Australia: second world occurrence. , Australian Journal of Mineralogy, 11, 7-11 |
| |
Canada | |
| Rose, E.R. (1973) Geology of vanadium and vanadiferous occurrences. Geological Survey of Canada, Economic Geology Reports. 27, 130p. |
| SASSANO, G. & ROCHELEAU, M. (1987) Quelques minéraux d'uranium des Bassin d'Otish et de Mistassini, Québec. Canadian Mineralogist 25, 185-193. |
China | |
| National Geological Archives of China database, record no. 51092 |
Czech Republic | |
| Pauliš, P., Moravec, B.: Francevillit z Litic n. Orlicí. Časopis pro mineralogii a geologii, 1990, roč. 35, č. 4, s. 425-427. |
DR Congo | |
| Deliens, M. (1996) Overzicht van de mineralogie van de koper-, kobalt- en uraniumvoorkomens in Zuid-Shaba (Zaïre). Pages 35-49 in: Schatten der Aarde. Van mineraal tot juweel. Tentoonstelling in de abdij Saint-Gérard de Brogne van 27 april tot 27 oktober 1996. Catalogus opgemaakt onder de leiding van R. Warin, AGAB en P. Van hee, MKA (in Dutch). |
| MinRec 20:287-288 |
| Wilson, W. E. (2018) The Musonoi mine, Kolwezi District, Lualaba Province, Democratic Republic of the Congo. Mineralogical Record 49:236-304 |
France | |
| Le Règne Minéral, (33), 5-25. |
| J.-J. Périchaud: "Les Minéraux d'Auvergne", Vol. 2, 1986 |
| H. Agrinier and J. Geffroy : "Les Minéraux Séléniés du Point Uranifère de Liauzun-en-Olloix (Puy de Dôme) : Clausthalite, Sélénium Natif, Sélénite de Plomb et Chalcoménite", Bull. Soc. Fr. Minéral. Cristallogr., 1967, XC, N°3, 383-386 |
| Wittern, Journée: "Mineralien finden in den Vogesen", von Loga (Cologne), 1997 |
| Le Règne Minéral, Hors Série IV, 1998 |
| Le Règne Minéral, Hors Série IV, 1998 |
| Le Règne Minéral, Hors Série IV, 1998 |
Gabon | |
| |
Branche, G., Ropert, M.E., Chantret, F., Morignat, B., Pouget, R. (1957) La francevillite, nouveau minéral uranifère. Comptes Rendus Hebdomadaires des Séances de l’Académie des Sciences: 245: 89-91.; Fleischer, M. (1958) New mineral names. American Mineralogist: 43: 180. | |
Janusz Janeczek (1999) Mineralogy and geochemistry of natural fission reactors in Gabon. Reviews in Mineralogy and Geochemistry, MSA, v. 38, p. 321-392 | |
Germany | |
| Walenta, K. (1992): Die Mineralien des Schwarzwaldes. Chr. Weise Verlag, München, 336 pp. (in German); WALENTA, K. (1993): Neue Mineralfunde von der Grube Clara (5. Folge). - Lapis 18 (1), 16-23; KOLITSCH, U. & GÖTZINGER, M. (2000): Einige Neufunde aus der Grube Clara im mittleren Schwarzwald: Eulytin, Namibit, Volborthit, Gearksutit, Spertiniit, Monazit-(La), Protasit, Sainfeldit, Cyanotrichit und Vauquelinit. - Erzgräber 14, 33-47; Gröbner, J., Kolitsch, U. und Bayerl, R. (2005): Interessante Uranmineralien im Stinkspat der Grube Clara. Lapis 30 (10), 34-39; 90; Gröbner, J., Bayerl, R. und Kolitsch, U. (2006): Weitere Beobachtungen zu den Uran- und Vanadium-Paragenesen der Grube Clara aus den Jahren 2002, 2004 und 2005. Erzgräber 20, 1-10 |
| No reference listed |
| A. Wittern: "Mineralfundorte in Deutschland", Schweizerbart (Stuttgart), 2001 |
| Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990 |
| Gröbner, J. and Kolitsch, U. (2007): The minerals of the uranium prospect at Tirpersdorf, Vogtland. Lapis 32, 37-42; 58. (in German) |
Italy | |
| Campostrini I.(2013): Minerali secondari dei giacimenti uraniferi nelle Arenarie di Val Gardena del Trentino occidentale (Alpi Meridionali, Italia). Studi Trent. Sci. Nat., 93, pagg. 89-114. |
Kazakhstan | |
| Pavel M. Kartashov data |
Kyrgyzstan | |
| |
Mauritania | |
| Mauritanian Geological Survey (1995) database |
Mauritanian Geological Survey (1995) database | |
| Mauritanian Geological Survey (1995) database |
Morocco | |
| W.Paar (1974) |
Niger | |
| J. P. le Roux and P. D. Toens (1987) in Gondwana six: stratigraphy, sedimentology, and paleontology, Volume 2 edited by Garry D. MacKenzie American Geophysical Union pp 139-146 |
Russia | |
| Pavel M. Kartashov data |
| Pavel M. Kartashov data |
Slovenia | |
| Dolenec, T. (1985): Secondary uranium minerals from the Zirovski Vrh uranium ore deposit. Rudarsko-Metalurski Zbornik 32, 195-206 (in Serbo-Croatian) |
South Korea | |
| Cheong, C. S., Jeong, G. Y., Kim, H., Choi, M. S., Lee, S. H., & Cho, M. (2003). Early Permian peak metamorphism recorded in U–Pb system of black slates from the Ogcheon metamorphic belt, South Korea, and its tectonic implication. Chemical Geology, 193(1), 81-92. |
Spain | |
| Calvo, M. (2009): Minerales y Minas de España. Vol. IV, Óxidos e Hidróxidos. Escuela Técnica Superior de Ingenieros de Minas de Madrid - Fundación Gómez Pardo. 752 pp |
UK | |
| Embrey, P.G. (1978) Fourth supplementary list of British minerals. Mineralogical Magazine, vol. 42, n° 322, 169-177.; Golley, P. & Williams, R. (1995): Cornish Mineral Reference Manual. Endsleigh Publications (Truro), 104 pp. |
USA | |
| Anita Moore-Nall and David R. Lageson (2015) Elevated REE in Ore Minerals of the Pryor Mountain Mining District, South Central Montana. 2015 Mining and Mineral Symposium, Montana Bureau of Mines and Geology pp47-49. |
Anita Moore-Nall and David R. Lageson (2015) Elevated REE in Ore Minerals of the Pryor Mountain Mining District, South Central Montana. 2015 Mining and Mineral Symposium, Montana Bureau of Mines and Geology pp47-49. | |
| |
| |
Zimbabwe | |
| Gallagher M. J. (1966): Francevillite from Rhodesia.- Bulletin of the Geological Survey of Great Britain, Vol. 25, (page 92). |
Quick NavTopAbout FrancevilliteClassification Physical Properties Optical Data Chemical Properties Crystallography Crystal StructureX-Ray Powder DiffractionType Occurrence SynonymsOther LanguagesRelationshipsCommon AssociatesNickel-StrunzDanaHey's CIMOther InformationReferences Internet Links Localities Locality List
Mounana Mine, Franceville, Mpassa, Haut-Ogooué Province, Gabon