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Françoisite-(Ce)

A valid IMA mineral species
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01272100017271948829415.jpg
Françoisite-(Ce), etc.

La Creusaz U prospect, La Creusaz, Les Marécottes, Salvan, Saint-Maurice, Valais, Switzerland
04498570017271948836348.jpg
Françoisite-(Ce), etc.

La Creusaz U prospect, La Creusaz, Les Marécottes, Salvan, Saint-Maurice, Valais, Switzerland
05134460017271948849530.jpg
Françoisite-(Ce), etc.

La Creusaz U prospect, La Creusaz, Les Marécottes, Salvan, Saint-Maurice, Valais, Switzerland
01272100017271948829415.jpg
Françoisite-(Ce), etc.

La Creusaz U prospect, La Creusaz, Les Marécottes, Salvan, Saint-Maurice, Valais, Switzerland
04498570017271948836348.jpg
Françoisite-(Ce), etc.

La Creusaz U prospect, La Creusaz, Les Marécottes, Salvan, Saint-Maurice, Valais, Switzerland
05134460017271948849530.jpg
Françoisite-(Ce), etc.

La Creusaz U prospect, La Creusaz, Les Marécottes, Salvan, Saint-Maurice, Valais, Switzerland
01272100017271948829415.jpg
Françoisite-(Ce), etc.

La Creusaz U prospect, La Creusaz, Les Marécottes, Salvan, Saint-Maurice, Valais, Switzerland
04498570017271948836348.jpg
Françoisite-(Ce), etc.

La Creusaz U prospect, La Creusaz, Les Marécottes, Salvan, Saint-Maurice, Valais, Switzerland
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About Françoisite-(Ce)Hide

This page provides mineralogical data about Françoisite-(Ce).


Name EncodingHide

ASCII-7:
Francoisite-(Ce)

Unique IdentifiersHide

Mindat ID:
27480
Long-form identifier:
mindat:1:1:27480:5

Similar NamesHide

FrancisiteA valid IMA mineral speciesCu3Bi(SeO3)2O2Cl
Françoisite
Françoisite-(Nd)A valid IMA mineral species(Nd,Ce,Sm)(UO2)3(PO4)2O(OH) · 6H2O

Classification of Françoisite-(Ce)Hide

04582630017697764655689.jpg
Phosphuranylite sheet topology

The sheet topology exhibited by members of the phosphuranylite group.

IMA Classification of Françoisite-(Ce)Hide

IMA status:
Approved
IMA Formula:
Ce3+(U6+O2)3(PO4)2O(OH)·6H2O
Approval year:
2004
Strunz-mindat (2026):
8.EC.05

8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
C : UO2:RO4 = 3:2

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference for Standard
Frç-CeIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Chemistry of Françoisite-(Ce)Hide

Mindat Formula:
(Ce,Nd,Ca)(UO2)3(PO4)2O(OH) · 6H2O
Element Weights:
Element% weight
U55.734 %
O27.472 %
Ce10.936 %
P4.835 %
H1.023 %

Calculated from ideal end-member formula.
U
O
Ce
P
H
Elements listed:
Ca, Ce, H, Nd, O, P, U - search for minerals with similar chemistry

Crystallography of Françoisite-(Ce)Hide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Cell Parameters:
a = 9.295 Å, b = 15.53 Å, c = 13.718 Å
β = 112.39°
Ratio:
a:b:c = 0.599 : 1 : 0.883
Unit Cell V:
1,830.93 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.76 Å(100)
5.77 Å(60)
4.42 Å(30)
4.37 Å(30)
3.87 Å(60)
3.43 Å(70)
3.14 Å(80)
2.038 Å(40)
Locality:
La Creusaz U prospect, La Creusaz, Les Marécottes, Salvan, Saint-Maurice, Valais, Switzerland
Comments:
From type description.

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 7: Great Oxidation Event<2.4
47a : [Near-surface hydration of prior minerals]
47c : [Carbonates, phosphates, borates, nitrates]
47f : [Uranyl (U⁶⁺) minerals]

Type Occurrence of Françoisite-(Ce)Hide

Synonyms of Françoisite-(Ce)Hide

Other Language Names for Françoisite-(Ce)Hide

Relationship of Françoisite-(Ce) to other SpeciesHide

Member of:
Phosphuranylite Group
Other Members of Phosphuranylite Group:
AlthupiteAlTh(UO2)7(PO4)4(OH)5O2 · 15H2OTric. 1 : P1
BergeniteCa2Ba4(UO2)9(PO4)6O6 · 16H2OMon. 2/m : P21/b
DewindtiteH2Pb3(UO2)6O4(PO4)4 · 12H2OOrth. mmm(2/m2/m2/m) : Cmma
DumontitePb2(UO2)3O2(PO4)2 · 5H2OMon. 2/m : P21/m
Françoisite-(Nd)(Nd,Ce,Sm)(UO2)3(PO4)2O(OH) · 6H2OMon. 2/m
HügelitePb2(UO2)3(AsO4)2O2 · 5H2OMon. 2/m : P21/m
PhosphuranyliteKCa(H3O)3(UO2)7(PO4)4O4 · 8H2OOrth. mmm(2/m2/m2/m) : Cmcm
PhuralumiteAl2[(UO2)3(PO4)2O(OH)](OH)3(H2O)9Mon. 2/m
PhurcaliteCa2(UO2)3(PO4)2O2 · 7H2OOrth. mmm(2/m2/m2/m) : Pbca
UpaliteAl(UO2)3(PO4)2O(OH) · 7H2OMon. 2/m : P21/b
VanmeersscheiteU6+(UO2)3(PO4)2(OH)6 · 4H2OOrth. mmm(2/m2/m2/m)
YingjiangiteK2Ca(UO2)7(PO4)4(OH)6 · 6H2OOrth. mmm(2/m2/m2/m) : Cmcm

Common AssociatesHide

Associations Based on Photo Data:
4 photos of Françoisite-(Ce) associated with Françoisite-(Nd)(Nd,Ce,Sm)(UO2)3(PO4)2O(OH) · 6H2O

Related Minerals - Strunz-mindat GroupingHide

8.EC.05UpaliteAl(UO2)3(PO4)2O(OH) · 7H2OMon. 2/m : P21/b
8.EC.05Françoisite-(Nd)(Nd,Ce,Sm)(UO2)3(PO4)2O(OH) · 6H2OMon. 2/m
8.EC.05PhuralumiteAl2[(UO2)3(PO4)2O(OH)](OH)3(H2O)9Mon. 2/m
8.EC.10YingjiangiteK2Ca(UO2)7(PO4)4(OH)6 · 6H2OOrth. mmm(2/m2/m2/m) : Cmcm
8.EC.10RenarditePb(UO2)4(PO4)2(OH)4 · H2OOrth.
8.EC.10PhosphuranyliteKCa(H3O)3(UO2)7(PO4)4O4 · 8H2OOrth. mmm(2/m2/m2/m) : Cmcm
8.EC.10ArsenuranyliteCa(UO2)4(AsO4)2(OH)4 · 6H2OOrth. mmm(2/m2/m2/m)
8.EC.10'Kivuite'Th(UO2)4(PO3OH)2(OH)8 · 7H2O
8.EC.10DewindtiteH2Pb3(UO2)6O4(PO4)4 · 12H2OOrth. mmm(2/m2/m2/m) : Cmma
8.EC.15DumontitePb2(UO2)3O2(PO4)2 · 5H2OMon. 2/m : P21/m
8.EC.15HügelitePb2(UO2)3(AsO4)2O2 · 5H2OMon. 2/m : P21/m
8.EC.20VanmeersscheiteU6+(UO2)3(PO4)2(OH)6 · 4H2OOrth. mmm(2/m2/m2/m)
8.EC.20ArsenovanmeersscheiteU6+(UO2)3(AsO4)2(OH)6 · 4H2OOrth. mm2 : Pmn21
8.EC.20MetavanmeersscheiteU6+(UO2)3(PO4)2(OH)6 · 2H2OOrth. mmm(2/m2/m2/m) : Fddd
8.EC.25AlthupiteAlTh(UO2)7(PO4)4(OH)5O2 · 15H2OTric. 1 : P1
8.EC.30MunditeAl(UO2)3(PO4)2(OH)3 · 5.5H2OOrth.
8.EC.35PhurcaliteCa2(UO2)3(PO4)2O2 · 7H2OOrth. mmm(2/m2/m2/m) : Pbca
8.EC.40BergeniteCa2Ba4(UO2)9(PO4)6O6 · 16H2OMon. 2/m : P21/b

RadioactivityHide

Other InformationHide

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 Françoisite-(Ce)Hide

References for Françoisite-(Ce)Hide

Localities for Françoisite-(Ce)Hide

Showing 2 localities.

This 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.
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Locality ListHide

- 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Australia (TL)
 
  • South Australia
    • Pastoral Unincorporated Area
      • Arkaroola (Arkaroola Wilderness Sanctuary; Arkaroola Station)
        • Mount Painter area
Roth (2007)
Switzerland (TL)
 
  • Valais
    • Saint-Maurice
      • Salvan
        • Les Marécottes
          • La Creusaz
Meisser et al. (2010)
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