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Francevillite (Francevillit)

Pictures (32 Images total)

Francevillit
Views (File:
1390815665
): 2392, Rating: 9.5
Francevillit
Bildbreite: 4 mm; Fundort: Mounana Mine, Franceville, Haut-Ogooué, Gabon
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Gabun/Haut-Ogooué, Provinz/Mpassa, Departement/Franceville/Mounana Mine
Mineral: Francevillite
Image: 1390815665
Rating: 9.5 (votes: 10)
License: Usage for Mineralienatlas project only
Francevillit

Bildbreite: 4 mm; Fundort: Mounana Mine, Franceville, Haut-Ogooué, Gabon

Copyright: Stephan Wolfsried
Contribution: Hg 2014-01-27
Locality: Mounana Mine / Franceville / Mpassa, Departement / Haut-Ogooué, Provinz / Gabun
Francevillit
Views (File:
1390562622
): 1716, Rating: 9.75
Francevillit
Bildbreite: 2,5 mm; Fundort: Mounana Mine, Franceville, Haut-Ogooué, Gabon
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Gabun/Haut-Ogooué, Provinz/Mpassa, Departement/Franceville/Mounana Mine
Mineral: Francevillite
Image: 1390562622
Rating: 9.75 (votes: 4)
License: Usage for Mineralienatlas project only
Francevillit

Bildbreite: 2,5 mm; Fundort: Mounana Mine, Franceville, Haut-Ogooué, Gabon

Copyright: Stephan Wolfsried
Contribution: Hg 2014-01-24
Locality: Mounana Mine / Franceville / Mpassa, Departement / Haut-Ogooué, Provinz / Gabun
Francevillit
Views (File:
1213856701
): 2561
Francevillit
Bildbreite: 1 mm; Fundort: Grube Clara, Wolfach, Schwarzwald, Deutschland
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Deutschland/Baden-Württemberg/Freiburg, Bezirk/Ortenaukreis/Oberwolfach/Grube Clara
Mineral: Francevillite
Image: 1213856701
Rating: 9.5 (votes: 2)
License: Usage for Mineralienatlas project only
Francevillit

Bildbreite: 1 mm; Fundort: Grube Clara, Wolfach, Schwarzwald, Deutschland

Copyright: Stephan Wolfsried
Contribution: Hg 2008-06-19
Locality: Grube Clara / Oberwolfach / Ortenaukreis / Freiburg, Bezirk / Baden-Württemberg / Deutschland
Francevillit
Views (File:
1390815506
): 1224
Francevillit
Bildbreite: 2,5 mm; Fundort: Mounana Mine, Franceville, Haut-Ogooué, Gabon
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Gabun/Haut-Ogooué, Provinz/Mpassa, Departement/Franceville/Mounana Mine
Mineral: Francevillite
Image: 1390815506
Rating: 9.5 (votes: 2)
License: Usage for Mineralienatlas project only
Francevillit

Bildbreite: 2,5 mm; Fundort: Mounana Mine, Franceville, Haut-Ogooué, Gabon

Copyright: Stephan Wolfsried
Contribution: Hg 2014-01-27
Locality: Mounana Mine / Franceville / Mpassa, Departement / Haut-Ogooué, Provinz / Gabun
Francevillit
Views (File:
1214130269
): 919, Rating: 9
Francevillit
Bildbreite: 2 mm; Fundort: Mounana Mine, Franceville, Haut-Ogooué, Gabon
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Gabun/Haut-Ogooué, Provinz/Mpassa, Departement/Franceville/Mounana Mine
Mineral: Francevillite
Image: 1214130269
Rating: 9 (votes: 4)
License: Usage for Mineralienatlas project only
Francevillit

Bildbreite: 2 mm; Fundort: Mounana Mine, Franceville, Haut-Ogooué, Gabon

Copyright: Stephan Wolfsried
Contribution: Hg 2008-06-22
Locality: Mounana Mine / Franceville / Mpassa, Departement / Haut-Ogooué, Provinz / Gabun
Francevillit
Views (File:
1213856759
): 2094
Francevillit
Bildbreite: 1,5 mm; Fundort: Grube Clara, Wolfach, Schwarzwald, Deutschland
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Deutschland/Baden-Württemberg/Freiburg, Bezirk/Ortenaukreis/Oberwolfach/Grube Clara
Mineral: Francevillite
Image: 1213856759
Rating: 9 (votes: 3)
License: Usage for Mineralienatlas project only
Francevillit

Bildbreite: 1,5 mm; Fundort: Grube Clara, Wolfach, Schwarzwald, Deutschland

Copyright: Stephan Wolfsried
Contribution: Hg 2008-06-19
Locality: Grube Clara / Oberwolfach / Ortenaukreis / Freiburg, Bezirk / Baden-Württemberg / Deutschland

Collectors Summary

Color bräunlichgelb, gelb, gelbgrün
Streak color hellgelb
Lustre Diamantglanz bis Perlmuttglanz
Hardness (Mohs) 3
Solubility +++ Säuren
Crystal System orthorhombisch, Pcan
Morphology dichte Krusten, feinkristallin, körnig, Kristalle

Chemism

Chemical formula

(Ba,Pb)(UO2)2V2O8·5H2O

Chemical composition

Barium, Blei, Sauerstoff, Uran, Vanadium, Wasserstoff

Unit weight: 1014.808901 u; Number of atoms in the formula: 32

Info

Empirical formula:

(Ba0.75Pb0.25)(UO2)2V2O8·5H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.99

10

31.25

1.0079470

10.0794700

Oxygen

O

26.80

17

53.13

15.9994300

271.9903100

Vanadium

V

10.04

2

6.25

50.9415100

101.8830200

Barium

Ba

10.15

0.75

2.34

137.3277000

102.9957750

Lead

Pb

5.10

0.25

0.78

207.2100000

51.8025000

Uranium

U

46.91

2

6.25

238.0289130

476.0578260

Analysis wt%

UO3 : 56.70, V2O5 : 18.56, PbO : 2.05, BaO : 13.90, H2O : 8.85 (Ref: Bulletin de Mineralogie 68)

Strunz 9th edition incl. updates

4.HB.15

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
H: V[5,6] Vanadate
B: Uranyl-Gruppenvanadate (Sorovanadate)
15:Francevillit-Gruppe

Lapis Classification

VII/E.11-100

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
E: Uranyl-Phosphate/Arsenate und Uranyl-Vanadate mit [UO2] 2+- [PO4]/[AsO4] 3- und [UO2] 2+-[V2O8] 6-, sowie isotype Vanadate (Sincosit-Reihe)
11: Uranyl-Gruppenvanadate mit [UO2] 2+-[V2O8] 6-

Classification by Hölzel

8.EE.510

8: PHOSPHATES ARSENATES VANADATES
E: Uranyl (Phospates-Arsenates-Vanadates)
E: UranylVanadates
5: C large, V=2 Curienite-Group

Dana 8th edition

40.02a.27.01

40: Hydrated Phosphates, etc
02a: Hydrated Phosphates, etc where A++ (B++)2 (XO4) · x(H2O), containing (UO2)++

IMA status

anerkannt 1975

Mineral status

anerkanntes Mineral

Optical Properties

Color

bräunlichgelb, gelb, gelbgrün

Streak color

hellgelb

Lustre

Diamantglanz bis Perlmuttglanz

max. Birefringence

0.20

Birefringence chart\! Francevillite title=Birefringence chart Francevillite

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.77

RI value β

1.93

RI value γ / ε

1.97!

Ri mean

1.890

2V angle

Biaxial (-) 52°

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

60

Space Group

Pcan

Cell parameters a (Å)

10.41

Cell parameters b (Å)

8.51

Cell parameters c (Å)

16.76

Cell parameters a/b or c/a

1.223

Cell parameters c/b

1.969

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volumne (ų)

1484.753

X-Ray Powder Diffraction

8.40(100),
5.20(80),
4.26(80),
4.20(70),
3.297(70),
3.211(70),
2.996(100),
2.126(80)

XRD chart Francevillite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Morphology

dichte Krusten, feinkristallin, körnig, Kristalle

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

3

VHN (Hardness Vickers)

83 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.55

4.54 ( ρ calc. Mineralienatlas )

Radioactivity

Fracevillit enthällt Uran und ist damit radioaktiv !

Instability

+++ Säuren

Preface

Associations

Autunit, Mounanait, Curienit, Chervetit

Name from

Typlokalität

Author (Name, Year)

Branche & Ropert & Chantret & Morignat & Pouget, 1957

Safety Instructions

Industrial chemicals are often present in powder form and therefore often contain much higher dangers than natural, crystalline substances. These hazard statements refer to the classification of industrially used chemical compounds that may also occur in this natural mineral. The hazard classification makes no claim to completeness.




Safety classes: Ionizing radiation: Radioaktiv

References

Handbook of Mineralogy (Anthony et al.), 4 (2000), 193

Other languages

German

Francevillit

Spanish

Francevillita

French

Francevillite

English

Francevillite

Russian

Франсвиллит

Alternative Name

Barium-Francevillite

CNMNC symbol

Symbol

Fvl

Locations with GPS information