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Francevillite

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Mounana Mine (Mouana Mine), Franceville, Haut-Ogooué Province, Gabon
© Stephan Wolfsried

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Formula:
(Ba,Pb)(UO
 
2
)
 
2
[VO
 
4
]
 
2
 · 5H
 
2
O
System:OrthorhombicHardness:3


Curienite-Francevillite Series.

Classification of Francevillite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:7/E.11-100
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID:40.2a.27.1

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2a : AB2(XO4)2·xH2O, containing (UO2)2+
Hey's CIM Ref.:21.4.10

21 : Vanadates (and vanadates with arsenate or phosphate)
4 : Vanadates of U, Mn, Fe or Ni
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Type Occurrence of Francevillite

Type Locality:Mounana Mine (Mouana Mine), Franceville, Haut-Ogooué Province, Gabon
Year of Discovery:1957

Physical Properties of Francevillite

Hardness (Mohs):3

Crystallography of Francevillite

Crystal System:Orthorhombic
Cell Parameters:a = 10.41Å, b = 8.51Å, c = 16.76Å
Ratio:a:b:c = 1.223 : 1 : 1.969
Unit Cell Volume:V 1,484.75 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Horizontal Axis: ° to ° Vertical Axis: % Source Data: Filtered Data: Peaks:
Data courtesy of RRUFF project at University of Arizona, used with permission.

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°
Maximum Birefringence:δ = 0.195 - 0.217

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High
Dispersion:strong

Chemical Properties of Francevillite

Formula:
(Ba,Pb)(UO
 
2
)
 
2
[VO
 
4
]
 
2
 · 5H
 
2
O
Essential elements:Ba, H, O, U, V
All elements listed in formula:Ba, H, O, Pb, U, V

Relationship of Francevillite to other Species

Series:Forms a series with Curienite (see here)
Related Minerals - Nickel-Strunz Grouping):

- +
4.HB.05Carnotite
K
 
2
(UO
 
2
)
 
2
[VO
 
4
]
 
2
 · 3H
 
2
O
4.HB.05Margaritasite
(Cs,K,H
 
3
O)
 
2
(UO
 
2
)
 
2
[VO
 
4
]
 
2
 · H
 
2
O
4.HB.10Sengierite
Cu
 
2
(UO
 
2
)
 
2
[VO
 
4
]
 
2
 · 6H
 
2
O
4.HB.15Curienite
Pb(UO
 
2
)
 
2
[VO
 
4
]
 
2
 · 5H
 
2
O
4.HB.15Fritzscheite
Mn(UO
 
2
)
 
2
(PO
 
4
,VO
 
4
)
 
2
·10H
 
2
O (?)
4.HB.20Metavanuralite
Al(UO
 
2
)
 
2
[OH|(VO
 
4
)
 
2
] · 8H
 
2
O
4.HB.20Vanuralite
Al(UO
 
2
)
 
2
[OH|(VO
 
4
)
 
2
] · 11H
 
2
O
4.HB.25Metatyuyamunite
Ca(UO
 
2
)
 
2
[VO
 
4
]
 
2
 · 3-5H
 
2
O
4.HB.25Tyuyamunite
Ca(UO
 
2
)
 
2
[VO
 
4
]
 
2
 · 5-8H
 
2
O
4.HB.30Strelkinite
Na
 
2
(UO
 
2
)
 
2
[VO
 
4
]
 
2
 · 6H
 
2
O
4.HB.35Uvanite
U
 
2
V
 
6
O
 
21
·15H
 
2
O
4.HB.40Rauvite
Ca(UO
 
2
)
 
2
V
 
10
O
 
28
·16H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
21.4.1Uvanite
U
 
2
V
 
6
O
 
21
·15H
 
2
O
21.4.2Vanuranylite
(H
 
3
O)
 
2
(UO
 
2
)
 
2
[VO
 
4
]
 
2
 · 4H
 
2
O
21.4.3Strelkinite
Na
 
2
(UO
 
2
)
 
2
[VO
 
4
]
 
2
 · 6H
 
2
O
21.4.4Carnotite
K
 
2
(UO
 
2
)
 
2
[VO
 
4
]
 
2
 · 3H
 
2
O
21.4.5Margaritasite
(Cs,K,H
 
3
O)
 
2
(UO
 
2
)
 
2
[VO
 
4
]
 
2
 · H
 
2
O
21.4.6Sengierite
Cu
 
2
(UO
 
2
)
 
2
[VO
 
4
]
 
2
 · 6H
 
2
O
21.4.7Metatyuyamunite
Ca(UO
 
2
)
 
2
[VO
 
4
]
 
2
 · 3-5H
 
2
O
21.4.8Tyuyamunite
Ca(UO
 
2
)
 
2
[VO
 
4
]
 
2
 · 5-8H
 
2
O
21.4.9Rauvite
Ca(UO
 
2
)
 
2
V
 
10
O
 
28
·16H
 
2
O
21.4.11Metavanuralite
Al(UO
 
2
)
 
2
[OH|(VO
 
4
)
 
2
] · 8H
 
2
O
21.4.12Vanuralite
Al(UO
 
2
)
 
2
[OH|(VO
 
4
)
 
2
] · 11H
 
2
O
21.4.13Curienite
Pb(UO
 
2
)
 
2
[VO
 
4
]
 
2
 · 5H
 
2
O
21.4.14Fritzscheite
Mn(UO
 
2
)
 
2
(PO
 
4
,VO
 
4
)
 
2
·10H
 
2
O (?)
21.4.15Palenzonaite
(Ca,Na)
 
3
CaMn
2+
2
[VO
 
4
]
 
3
21.4.16Santafeite
(Ca,Sr,Na)
 
12
(Mn
2+
 
,Fe
3+
 
,Al,Mg)
 
8
Mn
4+
8
(VO
 
4
)
 
16
(OH,O)
 
20
 · 8H
 
2
O
21.4.17Pyrobelonite
PbMn
2+
 
[OH|VO
 
4
]
21.4.18Brackebuschite
Pb
 
2
(Mn
3+
 
,Fe
3+
 
)[OH|(VO
 
4
)
 
2
]
21.4.19Čechite
Pb(Fe
2+
 
,Mn
2+
 
)[OH|VO
 
4
]
21.4.20Heyite
Pb
 
5
Fe
2+
2
[O
 
2
|VO
 
4
]
 
2
21.4.21Mounanaite
PbFe
3+
2
[VO
 
4
]
 
2
 · 2(OH,F)
21.4.22Schubnelite
Fe
 
2-x
V
 
2
O
 
4
(OH)
 
4
21.4.23Fervanite
Fe
 
4
(VO
 
4
)
 
4
·5H
 
2
O
21.4.24Kazakhstanite
Fe
 
5
V
 
3
V
 
12
O
 
39
(OH)
 
9
·9H
 
2
O
21.4.25Bokite
(Al,Fe
3+
 
)
 
1.3
[(V
5+
 
,V
4+
 
,Fe
3+
 
)
 
4
O
 
10
]
 
2
 · 7.5H
 
2
O
21.4.26Rusakovite
(Fe
3+
 
,Al)
 
5
[(OH)
 
9
|(VO
 
4
,PO
 
4
)
 
2
] · 3H
 
2
O
21.4.27Kolovratite
(Zn,Ni,Cu)
 
2-5
Al
 
4-6
(Si,V
4+
 
,V
5+
 
)
 
4
(O,OH)
 
20
·7.5H
 
2
O

Other Names for Francevillite

Synonyms:
Barium-Francevillite
Other Languages:
German:Francevillit
Russian:Франсвиллит
Spanish:Francevillita

Other Information

Health Warning: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:American Mineralogist: 43: 180.

Mereiter, K. (1986e) Crystal structure refinements of two francevillites, (Ba,Pb)[(UO2)2V2O8]·5H2O. Neues Jahrbuch für Mineralogie, Monatshefte (1986): 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

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  • Look for Francevillite on Wikipedia
  • Look for Francevillite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Francevillite in the Natural History Museum (London) online catalogue
  • Francevillite details from Handbook of Mineralogy (PDF)
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    Localities for Francevillite

    Hide Locality List
    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Australia
     
    • Northern Territory
      • South Alligator Valley Mineral Field
    		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
    • South Australia
      • Olary Province
        • Mingary
          • Radium Hill area
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Hradec Králové Region
        • Žamberk
    		Pauliš, P., Moravec, B.: Francevillit z Litic n. Orlicí. Časopis pro mineralogii a geologii, 1990, roč. 35, č. 4, s. 425-427.
    Democratic Republic of Congo (Zaïre)
     
    • Katanga (Shaba)
      • Katanga Copper Crescent
        • Central area
          • Kambove
        • Western area
          • Kolwezi
    		MinRec 20:287-288
    No reference listed
    France
     
    • Auvergne
      • Allier
        • Ébreuil
          • Échassières
    		Le Règne Minéral, (33), 5-25.
      • Cantal
        • Mauriac
          • Champagnac
    		J.-J. Périchaud: "Les Minéraux d'Auvergne", Vol. 2, 1986
      • Puy-de-Dôme
        • Saint-Amant-Tallende
          • Olloix
    		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
    • Lorraine
      • Vosges
        • Gérardmer
    		Wittern, Journée: "Mineralien finden in den Vogesen", von Loga (Cologne), 1997
    • Midi-Pyrénées
      • Aveyron
    		Le Règne Minéral, Hors Série IV, 1998
        • Gages
    		Le Règne Minéral, Hors Série IV, 1998
    • Provence-Alpes-Côte d'Azur
      • Var
        • Pradet
    		Le Règne Minéral, Hors Série IV, 1998
    Gabon
     
    • Haut-Ogooué Province
      • Franceville
    C.R.Acad.Sci.Paris (1957) 245, 89-91
    Germany
     
    • Baden-Württemberg
      • Black Forest
        • Triberg
          • Nußbach
    		No reference listed
        • Wolfach
          • Oberwolfach
            • Rankach valley
    		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
    • Bavaria
      • Franconia
        • Spessart Mts
          • Aschaffenburg
            • Dörrmorsbach
    		A. Wittern: "Mineralfundorte in Deutschland", Schweizerbart (Stuttgart), 2001
    • Rhineland-Palatinate
      • Rockenhausen
    		Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
    • Saxony
      • Vogtland
        • Oelsnitz
    		Gröbner, J. and Kolitsch, U. (2007): The minerals of the uranium prospect at Tirpersdorf, Vogtland. Lapis 32, 37-42; 58. (in German)
    Kazakhstan
     
    • Taldyqorghan Oblysy (Taldy-Kurgan [Taldykorgon] Oblast')
      • Middle Ili River
        • Dzharkenskaya Depression
    		Pavel M. Kartashov data
    Kyrgyzstan
     
    • Osh Oblast
      • Alai (Alay) Range
    Russia
     
    • Eastern-Siberian Region
      • Saha Republic (Sakha Republic; Yakutia)
        • Aldan Shield
          • Chara and Tokko Rivers Confluence
    		Pavel M. Kartashov data
    • Northern Region
      • Karelia Republic
        • Lake Onega
          • Zaonezhie peninsula
    		Pavel M. Kartashov data
    UK
     
    • England
      • Cornwall
        • St Austell District
          • St Stephen Area
            • St Stephen-in-Brannel
    		No reference listed
    USA
     
    • Pennsylvania
      • Carbon Co.
    • Utah
      • San Juan Co.
        • Paradox Valley
          • Paradox Valley District
    Mineral and/or Locality
    Google
     
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