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Chervetite (Chervetit)

Pictures (5 Images total)

Chervetit
Views (File:
1489061601
): 572
Chervetit
Chervetit,Francevillit; Mounana Mine,Gabun; Stufengröße: 8x11 cm
Copyright: Ferdl; Contribution: Rockhounder
Collection: Ferdl
Location: Gabun/Haut-Ogooué, Provinz/Mpassa, Departement/Franceville/Mounana Mine
Mineral: Chervetite
Image: 1489061601
Rating: 5 (votes: 1)
License: Usage for Mineralienatlas project only
Chervetit

Chervetit,Francevillit; Mounana Mine,Gabun; Stufengröße: 8x11 cm
Collection: Ferdl
Copyright: Ferdl
Contribution: Rockhounder 2017-03-09
Locality: Mounana Mine / Franceville / Mpassa, Departement / Haut-Ogooué, Provinz / Gabun
Chervetit
Views (File:
1284059486
): 1235
Chervetit
Größe: 10,2 x 8,3 cm; Fundort: Mounana Mine, Franceville, Haut-Ogooué, Gabun
Copyright: Rock Currier; Contribution: Philip Blümner
Location: Gabun/Haut-Ogooué, Provinz/Mpassa, Departement/Franceville/Mounana Mine
Mineral: Chervetite
Image: 1284059486
License: Usage for Mineralienatlas project only
Chervetit

Größe: 10,2 x 8,3 cm; Fundort: Mounana Mine, Franceville, Haut-Ogooué, Gabun
Copyright: Rock Currier
Contribution: Philip Blümner 2010-09-09
Locality: Mounana Mine / Franceville / Mpassa, Departement / Haut-Ogooué, Provinz / Gabun
Chervetit, Francevillit, Mounanait
Views (File:
1323595344
): 1128
Chervetit, Francevillit, Mounanait
blassgrüne Chervetitkristalle auf gelbem Francevillit und schwarzem Mounanait; Größe: 73x56 mm; Fundort: Mounana Mine, Franceville, Haut-Ogooué, Gabun
Copyright: Rock Currier; Contribution: Philip Blümner
Collection: British Museum of Natural History
Location: Gabun/Haut-Ogooué, Provinz/Mpassa, Departement/Franceville/Mounana Mine
Mineral: Chervetite, Francevillite, Mounanaite
Image: 1323595344
License: Usage for Mineralienatlas project only
Chervetit, Francevillit, Mounanait

blassgrüne Chervetitkristalle auf gelbem Francevillit und schwarzem Mounanait; Größe: 73x56 mm; Fundort: Mounana Mine, Franceville, Haut-Ogooué, Gabun
Collection: British Museum of Natural History
Copyright: Rock Currier
Contribution: Philip Blümner 2011-12-11
Locality: Mounana Mine / Franceville / Mpassa, Departement / Haut-Ogooué, Provinz / Gabun
Chervetit
Views (File:
1494239651
): 488
Chervetit
Chervetit; Mounana,Gabun; Stufengrösse: 9x4 cm; Ex-Sammlung Bültemann
Copyright: Ferdl; Contribution: Rockhounder
Collection: Ferdl, Donator: H. Bültemann
Location: Gabun/Haut-Ogooué, Provinz/Mpassa, Departement/Franceville/Mounana Mine
Mineral: Chervetite
Image: 1494239651
License: Usage for Mineralienatlas project only
Chervetit

Chervetit; Mounana,Gabun; Stufengrösse: 9x4 cm; Ex-Sammlung Bültemann
Collection: Ferdl
Copyright: Ferdl
Contribution: Rockhounder 2017-05-08
Locality: Mounana Mine / Franceville / Mpassa, Departement / Haut-Ogooué, Provinz / Gabun
Chervetit
Views (File:
1532423356
): 422
Chervetit
Chervetit von der Uran Grube Mounana Franceville Gabun Afrika; Stufengröße: 4,5 x3,5 cm; Ex-Sammlung Bültemann
Copyright: Ferdl; Contribution: Rockhounder
Collection: Ferdl, Donator: H. Bültemann
Location: Gabun/Haut-Ogooué, Provinz/Mpassa, Departement/Franceville/Mounana Mine
Mineral: Chervetite
Image: 1532423356
License: Usage for Mineralienatlas project only
Chervetit

Chervetit von der Uran Grube Mounana Franceville Gabun Afrika; Stufengröße: 4,5 x3,5 cm; Ex-Sammlung Bültemann
Collection: Ferdl
Copyright: Ferdl
Contribution: Rockhounder 2018-07-24
Locality: Mounana Mine / Franceville / Mpassa, Departement / Haut-Ogooué, Provinz / Gabun

Collectors Summary

Color braun, farblos, grau
Streak color weiß
Hardness (Mohs) 2.75
Crystal System monoklin, P21/a

Chemism

Chemical formula

Pb2V2O7

Chemical composition

Blei, Sauerstoff, Vanadium

Unit weight: 628.29903 u; Number of atoms in the formula: 11

Info

Empirical formula:

Pb2V2O7

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

17.83

7

63.64

15.9994300

111.9960100
Vanadium

V

16.22

2

18.18

50.9415100

101.8830200
Lead

Pb

65.96

2

18.18

207.2100000

414.4200000

Analysis wt%

V2O5 : 33.02, PbO : 67.05 (Ref: Bulletin de Mineralogie 63)

Strunz 9th edition incl. updates

8.FA.15

8: Phosphate, Arsenate, Vanadate
F: Polyphosphate, Polyarsenate, ~[4]-Polyvanadate
A: Diphosphate, etc., ohne OH und H2O; Dimers von eckenteilenden RO4 Tetraedern
15:Chervetit-Gruppe

Lapis Classification

VII/A.20-030

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
A: Wasserfreie Phosphate [PO4] 3-, ohne fremde Anionen
20: Wasserfreie Diarsenate und Divanadate [As2O7] / [V2O7] 4-

Classification by Hölzel

8.AD.900

8: PHOSPHATES ARSENATES VANADATES
A: Phosphates (-anions -water)
D: Phosphates, C large

Dana 8th edition

38.05.05.01

38: Anhydrous Phosphates, etc
05: Anhydrous Phosphates, etc with miscellaneous formulae

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

braun, farblos, grau

Streak color

weiß

Diaphaneity (Transparency)

transparent bis durchscheinend

max. Birefringence

0.279
Birefringence chart\! Chervetite title=Birefringence chart Chervetite

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

2.2

RI value γ / ε

2.6

2V angle

Biaxial (-) 70°~

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/a

Cell parameters a (Å)

13.47

Cell parameters b (Å)

7.32

Cell parameters c (Å)

6.95

Cell parameters a/b or c/a

1.840

Cell parameters c/b

0.949

Cell parameters α

90°

Cell parameters β

107.42

Cell parameters γ

90°

Z

4

Volume (ų)

653.843

X-Ray Powder Diffraction

3.569(70),
3.441(100),
3.428(100),
3.206(90),
3.161(70),
3.081(80),
2.985(70),
2.738(70)
XRD chart Chervetite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

2.75

VHN (Hardness Vickers)

68 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

6.3 - 6.49 / Durchschnittlich = 6.39

6.382 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Gabun/Haut-Ogooué, Provinz/Mpassa, Departement/Franceville/Mounana Mine

Preface

Author (Name, Year)

Bariand & Chantret & Pouget & Rimsky, 1963

References

Handbook of Mineralogy (Anthony et al.), 3 (1997), 114

Other languages

German

Chervetit

Spanish

Chervetita

French

Chervetite

English

Chervetite

Russian

Шерветит

CNMNC symbol

Symbol

Crv

Locations with GPS information

IDs

GUSID (Global unique identifier short form) isAaDklaKkemkmJLv1-8Eg
GUID (Global unique identifier) 0E1AC08A-5A49-472A-A692-624BBF5FBC12
Database ID 708