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Chervetite

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About ChervetiteHide

00156230015787910213174.jpg
Jean Chervet
Formula:
Pb2(V2O7)
Colour:
Gray to brown
Lustre:
Adamantine
Hardness:
2 - 2½
Specific Gravity:
6.30 - 6.32
Crystal System:
Monoclinic
Name:
Named in honor of Jean Chervet (31 August 1904, Nancy, France - 17 August 1962, France), mineralogist and director of the Mineralogy Service of the Atomic Energy Commission in France.

Classification of ChervetiteHide

Approved
First Published:
1963
8.FA.15

8 : PHOSPHATES, ARSENATES, VANADATES
F : Polyphosphates, Polyarsenates, [4]-Polyvanadates
A : Polyphosphates, etc., without OH and H2O; dimers of corner-sharing RO4 tetrahedra.
38.5.5.1

38 : ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
5 : Miscellaneous
21.3.8

21 : Vanadates (and vanadates with arsenate or phosphate)
3 : Vanadates of Al, rare earths, Pb, V or Bi

Physical Properties of ChervetiteHide

Adamantine
Transparency:
Transparent
Colour:
Gray to brown
Streak:
White
Hardness:
2 - 2½ on Mohs scale
Comment:
Less than 3
Density:
6.30 - 6.32 g/cm3 (Measured)    

Optical Data of ChervetiteHide

Type:
Biaxial (-)
Dispersion:
r > v very strong

Chemical Properties of ChervetiteHide

Formula:
Pb2(V2O7)
IMA Formula:
Pb2V5+2O7

Crystallography of ChervetiteHide

Crystal System:
Monoclinic
Cell Parameters:
a = 13.3 Å, b = 7.14 Å, c = 7.08 Å
β = 106°
Ratio:
a:b:c = 1.863 : 1 : 0.992
Unit Cell V:
646.29 ų (Calculated from Unit Cell)
Z:
4
Twinning:
Commonly twinned on {100}

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0012125ChervetiteKawahara A (1967) La structure cristalline de la chervetite Bulletin de la Societe Francaise de Mineralogie et de Cristallographie 90 279-2841967Mounana, Gabon0293
0019227ChervetiteShannon R D, Calvo C (1973) Refinement of the crystal structure of synthetic chervetite, Pb2V2O7 Canadian Journal of Chemistry 51 70-761973synthetic0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.93 Å(F)
4.32 Å(mF)
3.569 Å(mF)
3.441 Å(FFF)
3.428 Å(FFF)
3.206 Å(FF)
3.081 Å(F)

Type Occurrence of ChervetiteHide

General Appearance of Type Material:
Crystals from less than a mm to several cm, always twinned. Also as pseudomorphs after francevillite.
Place of Conservation of Type Material:
National School of Mines, Paris, France.
Geological Setting of Type Material:
Oxidation zone of uranium deposit
Reference:
Bariand, P., Chantret, F., Pouget, R. and Rimsky, A. (1963) Une nouvelle éspèce minérale: la chervetite, pyrovanadate de plomb Pb2V2O7. Bulletin de la Société Française de Minéralogie et de Cristallographie: 86: 117-120.

Other Language Names for ChervetiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
30 photos of Chervetite associated with FrancevilliteBa(UO2)2(VO4)2 · 5H2O
18 photos of Chervetite associated with CurienitePb(UO2)2(VO4)2 · 5H2O
7 photos of Chervetite associated with MounanaitePbFe3+2(VO4)2(OH,F)2
4 photos of Chervetite associated with ČechitePbFe2+(VO4)(OH)
2 photos of Chervetite associated with HedyphaneCa2Pb3(AsO4)3Cl
2 photos of Chervetite associated with Curienite-Francevillite Series
1 photo of Chervetite associated with DuttoniteV4+O(OH)2
1 photo of Chervetite associated with VanuraliteAl(UO2)2(V2O8)(OH) · 11H2O

Related Minerals - Nickel-Strunz GroupingHide

8.FA.05Blossiteα-Cu2(V2O7)Orth. mm2 : Fdd2
8.FA.10Ziesiteβ-Cu2(V2O7)Mon.
8.FA.15UM1999-17:O:PbVPb4V2O9 or Pb4(VO4)2O
8.FA.20Pyrocoproite(K,Na)2Mg(P2O7)Mon.
8.FA.20PyrophosphiteK2Ca(P2O7)Mon.
8.FA.25Petewilliamsite(Ni,Co)30(As2O7)15Mon. 2 : B2

Related Minerals - Dana Grouping (8th Ed.)Hide

38.5.5.2Ziesiteβ-Cu2(V2O7)Mon.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

21.3.1SteigeriteAl(VO4) · 3H2OMon. 2/m : P21/m
21.3.2AlvaniteZnAl4(V5+O3)2(OH)12 · 2H2OMon. 2/m : P21/m
21.3.3MetaschoderiteAl2(PO4)(VO4) · 6H2OMon. 2/m : P2/m
21.3.4SchoderiteAl2(PO4)(VO4) · 8H2OMon.
21.3.5SatpaeviteAl12V4+2V5+6O37 · 30H2OOrth.
21.3.6VanaliteNaAl8V10O38 · 30H2OMon.
21.3.7Wakefieldite-(Ce)Ce(VO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
21.3.7Wakefieldite-(Y)Y(VO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
21.3.9MottramitePbCu(VO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
21.3.10DescloizitePbZn(VO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
21.3.11ClinobisvaniteBi(VO4)Mon. 2/m
21.3.11DreyeriteBi(VO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
21.3.11PucheriteBi(VO4)Orth. mmm (2/m 2/m 2/m)
21.3.12SchumacheriteBi3(VO4)2O(OH)Tric.
21.3.13NamibiteCu(BiO)2(VO4)(OH)Tric. 1 : P1
21.3.14Pottsite(Pb3xBi4-2x)(VO4)4·H2O (0.8 < x < 1.0)Tet. 4/m : I41/a
21.3.15Duhamelite(Pb,Bi,Ca)Cu(VO4)(OH,O)Orth.

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.

References for ChervetiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Bariand, P., Chantret, F., Pouget, R. and Rimsky, A. (1963) Une nouvelle éspèce minérale: la chervetite, pyrovanadate de plomb Pb2V2O7. Bulletin de la Société Française de Minéralogie et de Cristallographie: 86: 117-120. (in French)
Fleischer, M. (1963) New mineral names. American Mineralogist: 48: 1413-1421.
Kawahara, A. (1967) La structure cristalline de la chervétite. Bulletin de la Société Française de Minéralogie et de Cristallographie: 90: 279-284.
International Mineralogical Association (1967) Commission on new minerals and mineral names. Mineralogical Magazine: 36: 131-136.
Shannon, R.D., Calvo, C. (1973) Refinement of the crystal structure of synthetic chervetite, Pb2V2O7. Canadian Journal of Chemistry: 51: 70-76.
Cervelle, B., Cesbron, F. (1973) Propriétés optiques de la chervétite, pyrovanadate de plomb. Bulletin de Minéralogie Année: 96-6: 391-392.

Internet Links for ChervetiteHide

Localities for ChervetiteHide

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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Czech Republic
 
  • Central Bohemian Region
    • Příbram District
      • Vrančice
[Lapis 1995, 12, p.13-24]
J.Hyrsl (1992)
Gabon (TL)
 
  • Haut-Ogooué Province
    • Franceville
Bull.Soc.fr.Min.Crist.(1963) 86, 117-120
Germany
 
  • Lower Saxony
    • Goslar District
      • Braunlage
No reference listed
USA
 
  • Michigan
    • Baraga Co.
      • Huron River
Rocks & Minerals 82:298-308
  • Nevada
    • Clark Co.
      • Spring Mountains
        • Goodsprings Mining District
NBMG Spec. Pub. 31 Minerals of Nevada
 
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