Metavanuralite

Al(UO2)2(VO4)2(OH) · 8H2O
IMA status
  • Approved
IMA symbol
Mvnr
Discovered
1970
IMA approved
1970
Also known as
  • IMA1970-003
  • Metavanuraliet

Where it forms, where it's found

Geological setting

Hydrothermal uranium and vanadium deposit.

Type locality
Mounana Mine
  1. Mounana
  2. Léboumbi-Leyou Department
  3. Haut-Ogooué Province
  4. Gabon

-1.4333°, 13.1500°

4recorded occurrences
Source · OpenStreetMap

Radioactivity

Physical

Transparency
Translucent
Colour
Yellow · greenish yellow
Streak
Pale yellow
Tenacity
brittle
Cleavage
Perfect

(001)

Fracture
Splintery · Micaceous

Optical

Optical type
Biaxial
UV response
Not fluorescent in UV

Crystallography

Crystal system
Triclinic
Cell parameters
a = 10.46(3) Å · b = 8.44(3) Å · c = 10.43(3) Å
Cell angles
α = 75.88(33) ° · β = 102.83(33) ° · γ = 90.00(33) °
Ratio a:b:c
1 : 0.807 : 0.997
Z
2
Morphology

Bladed crystals with oblique termination, usually in somewhat radial aggregates.

Type-locality form

Yellow bladed crystals usually in radial clusters.

Comment

Point Group: _1 or 1; Space Group: P_1 or P1.

Chemical composition

Constituent elements
Mass composition breakdown
ElementAtoms At. mass g/mol Mass g/molMass share
92UUraniumUranium2238.029476.058
49.69%
8OOxygenOxygen2115.999335.979
35.07%
23VVanadiumVanadium250.942101.884
10.63%
13AlAluminiumAluminium126.98226.982
2.82%
1HHydrogenHydrogen171.00817.136
1.79%
Total958.039100.00%

Mass share = atoms × atomic mass ÷ molar mass × 100

From IMA formula

Synonyms

  • IMA1970-003
  • Metavanuraliet

In other languages

German
IMA 1970-003 · Metavanuralit
Italian
Metavanuralite

Classification

Strunz
10th ed.

4.HB.20

  • 4OxidesClass
  • 4.HV[5,6] VanadatesDivision
  • 4.HBUranyl SorovanodatesGroup
  • 4.HB.20MetavanuraliteSpecies
Dana
8th ed.

42.11.13.02

  • 42Hydrated Phosphates, Etc.containing Hydroxyl or HalogenClass
  • 42.11(AB)3(XO4)2Zq·xH2OType
  • 42.11.13Vanuralite GroupGroup
  • 42.11.13.02MetavanuraliteSpecies
CIM

21.4.11

  • 21Vanadates (and vanadates with arsenate or phosphate)Class
  • 21.4Vanadates of U, Mn, Fe or NiGroup
  • 21.4.11MetavanuraliteSpecies

Group, growth & confusion

Literature, links & citation

Citations
  1. 1970Cesbron, Fabien (1970) Nouvelles données sur la vanuralite. Existence de la méta˗vanuralite. Bulletin de Minéralogie, 93 (2) 242-248 doi:10.3406/bulmi.1970.6459DOI: 10.3406/bulmi.1970.6459
  2. 1971Fleischer, Michael (1971) New Mineral Names. American Mineralogist, 56 (3-4) 631-640
  3. 2005(2005) Metavanuralite. Handbook of Mineralogy. Mineralogical Society of America
Cite this entry
@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Metavanuralite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/metavanuralite-2693},
  note      = {Accessed 2026-05-11}
}