Cabvinite

Th2F7(OH) · 3H2O
IMA status
  • Approved
IMA symbol
Cbv
IMA approved
2017
Also known as
  • Cabviniet
  • IMA2016-011

Where it forms, where it's found

Geological setting

Mo-Bi ore deposit

Type locality
Punta de Su Seinargiu (Su Seinargiu
  1. Su Senargiu)
  2. Sarroch
  3. Metropolitan City of Cagliari
  4. Sardinia
  5. Italy

39.0815°, 8.9770°

1recorded occurrences
Source · OpenStreetMap

Radioactivity

Physical

Colour
White

Crystallography

Crystal system
Tetragonal
Space group
#135
Cell parameters
a = 11.3689(2) Å · c = 6.4175(1) Å
Unit cell volume
829.47 ų
Z
4
Morphology

Square prismatic crystals, up to 100 μm in length and 40 μm in thickness.

Type-locality form

White square prismatic crystals, up to 100 μm in length and 40 μm in thickness

Chemical composition

Constituent elements
Mass composition breakdown
ElementAtoms At. mass g/mol Mass g/molMass share
90ThThoriumThorium2232.038464.076
69.46%
9FFluorineFluorine718.998132.986
19.90%
8OOxygenOxygen415.99963.996
9.58%
1HHydrogenHydrogen71.0087.056
1.06%
Total668.114100.00%

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

From IMA formula

Synonyms

  • Cabviniet
  • IMA2016-011

In other languages

German
Cabvinit · IMA 2016-011

Classification

Strunz
10th ed.

3.D0

  • 3HalidesClass
  • 3.DOxyhalides, hydroxyhalides and related double halidesDivision
  • 3.D0— unnamed intermediate level —Group
  • 3.D0CabviniteSpecies

Literature, links & citation

Citations
  1. 2016Hålenius, U., Hatert, F., Pasero, M., Mills, S. J. (2016) New minerals and nomenclature modifications approved in 2016, CNMNC Newsletter no 31. Mineralogical Magazine, 80 (4) 691-697 doi:10.1180/minmag.2016.080.083DOI: 10.1180/minmag.2016.080.083
  2. 2017(2017) Cabvinite. Handbook of Mineralogy. Mineralogical Society of America
  3. 2017Orlandi, Paolo, Biagioni, Cristian, Zaccarini, Federica (2017) Cabvinite, Th2F7(OH)·3H2O, the first natural actinide halide. American Mineralogist, 102 (7) 1384-1389 doi:10.2138/am-2017-6013 DOI: 10.2138/am-2017-6013
Cite this entry
@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Cabvinite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/cabvinite-47794},
  note      = {Accessed 2026-05-11}
}