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Chervetite

A valid IMA mineral species

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Photos of Chervetite (39)

Chervetite Gallery Search Photos of Chervetite

Edit Add Synonym Edit CIF structures Clear Cache

Chervetite

Mounana Mine, Mounana, Léboumbi-Leyou Department, Haut-Ogooué Province, Gabon

Chervetite, etc.

Mounana Mine, Mounana, Léboumbi-Leyou Department, Haut-Ogooué Province, Gabon

Chervetite, etc.

Mounana Mine, Mounana, Léboumbi-Leyou Department, Haut-Ogooué Province, Gabon

Chervetite

Mounana Mine, Mounana, Léboumbi-Leyou Department, Haut-Ogooué Province, Gabon

Chervetite, etc.

Mounana Mine, Mounana, Léboumbi-Leyou Department, Haut-Ogooué Province, Gabon

Chervetite, etc.

Mounana Mine, Mounana, Léboumbi-Leyou Department, Haut-Ogooué Province, Gabon

Chervetite

Mounana Mine, Mounana, Léboumbi-Leyou Department, Haut-Ogooué Province, Gabon

Chervetite, etc.

Mounana Mine, Mounana, Léboumbi-Leyou Department, Haut-Ogooué Province, Gabon

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About ChervetiteHide

Jean Chervet

Formula:

Pb₂(V₂O₇)

Colour:

Gray to brown

Lustre:

Adamantine

Hardness:

2 - 2½

Specific Gravity:

6.30 - 6.49

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.

Type Locality:

ⓘ Mounana Mine, Mounana, Léboumbi-Leyou Department, Haut-Ogooué Province, Gabon

Compare UM1999-17:O:PbV.

Unique IdentifiersHide

Mindat ID:

995

Long-form identifier:

mindat:1:1:995:5

GUID
(UUID V4):

c14f6fbf-5d08-4be2-8a5a-e8229150bd50

IMA Classification of ChervetiteHide

IMA status:

Approved

IMA Formula:

Pb₂V⁵⁺₂O₇

First published:

1963

Type description 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.

Classification of ChervetiteHide

Strunz-mindat (2024):

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.

Dana 8th ed.:

38.5.5.1

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

Hey's CIM Ref.:

21.3.9

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

Mineral SymbolsHide

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

Symbol	Source	Reference
Crv	IMA–CNMNC	Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of ChervetiteHide

Lustre:

Adamantine

Transparency:

Transparent

Colour:

Gray to brown

Streak:

White

Hardness:

2 - 2½ on Mohs scale

Comment:

Less than 3

Cleavage:

Distinct/Good
{100} and {010}

Density:

6.30 - 6.49 g/cm³ (Measured) 6.38 g/cm³ (Calculated)

Optical Data of ChervetiteHide

Type:

Biaxial (-)

RI values:

n_α = 2.250(8) n_β = 2.382(8) n_γ = 2.410(8)

2V:

Measured: 50°

Max Birefringence:

δ = 0.160

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Surface Relief:

Very High

Dispersion:

r > v very strong

Pleochroism:

Weak

Comments:

X == light brownish; Z == brownish.

Chemistry of ChervetiteHide

Mindat Formula:

Pb₂(V₂O₇)

Elements listed:

O, Pb, V - search for minerals with similar chemistry

Crystallography of ChervetiteHide

Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

Space Group:

P2₁/b

Setting:

P2₁/a

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 Å³ (Calculated from Unit Cell)

Twinning:

Commonly twinned on {100}
contact twins or finely polysynthetic lamellae.

Crystal StructureHide

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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure

ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0012125	Chervetite	Kawahara A (1967) La structure cristalline de la chervetite Bulletin de la Societe Francaise de Mineralogie et de Cristallographie 90 279-284		1967	Mounana, Gabon	0	293
0019227	Chervetite	Shannon R D, Calvo C (1973) Refinement of the crystal structure of synthetic chervetite, Pb2V2O7 Canadian Journal of Chemistry 51 70-76		1973	synthetic	0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Chervetite'
loop_
_publ_author_name
'Kawahara A'
_journal_name_full 'Bulletin de la Societe Francaise de Mineralogie et de Cristallographie'
_journal_volume 90 
_journal_year 1967
_journal_page_first 279
_journal_page_last 284
_publ_section_title
;
 La structure cristalline de la chervetite
;
_database_code_amcsd 0012125
_chemical_compound_source 'Mounana, Gabon'
_chemical_formula_sum 'Pb2 V2 O7'
_cell_length_a 13.37
_cell_length_b 7.16
_cell_length_c 7.11
_cell_angle_alpha 90
_cell_angle_beta 106
_cell_angle_gamma 90
_cell_volume 654.268
_exptl_crystal_density_diffrn      6.378
_symmetry_space_group_name_H-M 'P 1 21/a 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2-y,z'
  '1/2-x,1/2+y,-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Pb1  -0.13258   0.40961   0.05457
Pb2   0.15443   0.19219   0.33423
V1   0.10748   0.06010  -0.20087
V2  -0.08527   0.32390  -0.38817
O1   0.46243   0.38074   0.13748
O2   0.18039   0.21684  -0.02918
O3   0.30039   0.45473   0.32882
O4   0.46823   0.70119   0.40100
O5   0.04238   0.48135   0.24622
O6   0.15793   0.83009   0.30641
O7   0.32602   0.13500   0.40351

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
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)

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
Stage 7: Great Oxidation Event	<2.4
47e : [Vanadates, chromates, manganates]
47h : [Near-surface oxidized, dehydrated minerals]

Type Occurrence of ChervetiteHide

Type Locality:

ⓘ Mounana Mine, Mounana, Léboumbi-Leyou Department, Haut-Ogooué Province, Gabon

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

Associated Minerals at Type Locality:

Wulfenite

Francevillite

Reference:

Download:

http://rruff.info/rruff_1.0/uploads/BSFMC86_117.pdf

Other Language Names for ChervetiteHide

German:Chervetit

Russian:Шерветит

Spanish:Chervetita

Common AssociatesHide

Associated Minerals Based on Photo Data:

70 photos of Chervetite associated with Francevillite	Ba(UO₂)₂(VO₄)₂ · 5H₂O
30 photos of Chervetite associated with Curienite	Pb(UO₂)₂(VO₄)₂ · 5H₂O
26 photos of Chervetite associated with Mounanaite	PbFe³⁺₂(VO₄)₂(OH,F)₂
9 photos of Chervetite associated with Čechite	PbFe²⁺(VO₄)(OH)
2 photos of Chervetite associated with Hedyphane	Ca₂Pb₃(AsO₄)₃Cl
2 photos of Chervetite associated with Curienite-Francevillite Series
2 photos of Chervetite associated with Vanuralite	Al(UO₂)₂(V₂O₈)(OH) · 11H₂O
2 photos of Chervetite associated with Mottramite	PbCu(VO₄)(OH)
1 photo of Chervetite associated with Duttonite	V⁴⁺O(OH)₂

Related Minerals - Strunz-mindat Grouping Hide

8.FA.	Anastasenkoite	CaFe²⁺(P₂O₇)	Tric. 1 : P1
8.FA.	Phosphocyclite-(Fe)	Fe²⁺₂(P₄O₁₂)	Mon. 2/m : B2/b
8.FA.	Phosphocyclite-(Ni)	Ni₂(P₄O₁₂)	Mon. 2/m : B2/b
8.FA.	Lisanite	CaNiP₂O₇	Tric. 1 : P1
8.FA.	Shasuite	CaNi₃(P₂O₇)₂	Mon. 2/m : P2₁/b
8.FA.	Nabateaite	Fe₂P₂O₇	Tric. 1 : P1
8.FA.	Samraite	Ni₂P₂O₇	Mon. 2/m : P2₁/b
8.FA.	Bakakinite	Ca₂V₂O₇	Tric. 1 : P1
8.FA.05	Blossite	α-Cu₂(V₂O₇)	Orth. mm2 : Fdd2
8.FA.10	Ziesite	β-Cu₂(V₂O₇)	Mon. 2/m : B2/b
8.FA.15	UM1999-17:O:PbV	Pb₄V₂O₉ or Pb₄(VO₄)₂O
8.FA.20	Pyrocoproite	(K,Na)₂Mg(P₂O₇)	Mon.
8.FA.20	Pyrophosphite	K₂Ca(P₂O₇)	Mon.
8.FA.25	Petewilliamsite	(Ni,Co)₃₀(As₂O₇)₁₅	Mon. 2 : B2

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 ChervetiteHide

mindat.org URL:

https://www.mindat.org/min-995.html
Please feel free to link to this page.

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External Links:

Look for Chervetite on Webmineral

Look for Chervetite on Wikipedia

Look for Chervetite on Mineralien Atlas

Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

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References for ChervetiteHide

Reference List:

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.

IMA (1967) International Mineralogical Association: Commission on New Minerals and Mineral Names. Mineralogical Magazine and Journal of the Mineralogical Society, 36 (277) 131-136 doi:10.1180/minmag.1967.036.277.20

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.

(2023) Chervetite. Handbook of Mineralogy. Mineralogical Society of America

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 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.


Czech Republic
Central Bohemian Region Příbram District Vrančice ⓘ Alexander Mine	[Lapis 1995
ⓘ Pošepný vein outcrop	J.Hyrsl (1992)

Gabon (TL)
Haut-Ogooué Province Léboumbi-Leyou Department Mounana ⓘ Mounana Mine (TL)	Bariand et al. (1963) +1 other reference
ⓘ Oklo Mine

Germany
Lower Saxony Goslar District Braunlage ⓘ St Andreasberg

Russia
Republic of Karelia Loukhsky District Salla-Kuolajarvi belt ⓘ Lagernoe deposit	Koval et al. (2019)

USA
Michigan Baraga County Huron River ⓘ Huron River Uranium prospect (Unnamed V prospect; MRDS - 10171055)	Carlson et al. (2007)
Nevada Clark County Spring Mountains Goodsprings Mining District ⓘ Ruth Mine	Castor et al. (2004)

Chervetite

About ChervetiteHide

Unique IdentifiersHide

IMA Classification of ChervetiteHide

Classification of ChervetiteHide

Mineral SymbolsHide

Physical Properties of ChervetiteHide

Optical Data of ChervetiteHide

Chemistry of ChervetiteHide

Crystallography of ChervetiteHide

Crystal StructureHide

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of ChervetiteHide

Other Language Names for ChervetiteHide

Common AssociatesHide

Related Minerals - Strunz-mindat GroupingHide

Other InformationHide

Internet Links for ChervetiteHide

References for ChervetiteHide

Localities for ChervetiteHide

Locality ListHide

Related Minerals - Strunz-mindat Grouping Hide