Valleyite

Ca4Fe6O13
IMA status
  • Approved
IMA symbol
Vly
IMA approved
2017
Also known as
  • IMA2017-026
  • Valleyiet

Where it forms, where it's found

Geological setting

Late Pleistocene basaltic scoria.

Type locality
Menan volcanic complex
  1. Rexburg area
  2. Madison County
  3. Idaho
  4. USA

43.7842°, -111.9731°

1recorded occurrences
Source · OpenStreetMap

Crystallography

Crystal system
Isometric
Space group
#210
Cell parameters
a = 8.8852(7) Å
Morphology

(100), (111), and (111)

Type-locality form

Crystals ~250 to ~500 nm.

Chemical composition

Constituent elements
Mass composition breakdown
ElementAtoms At. mass g/mol Mass g/molMass share
26FeIronIron655.845335.070
47.64%
8OOxygenOxygen1315.999207.987
29.57%
20CaCalciumCalcium440.078160.312
22.79%
Total703.369100.00%

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

From IMA formula

Synonyms

  • IMA2017-026
  • Valleyiet

In other languages

German
IMA 2017-026 · Valleyit

Classification

Strunz
10th ed.

4.BC.30

  • 4OxidesClass
  • 4.BMetal: Oxygen = 3:4 and similarDivision
  • 4.BCWith medium-sized and large cationsGroup
  • 4.BC.30ValleyiteSpecies

Literature, links & citation

Citations
  1. 2017Hålenius, U., Hatert, F., Pasero, M., Mills, S. J. (2017) New minerals and nomenclature modifications approved in 2017, CNMNC Newsletter No 38. Mineralogical Magazine, 81 (4) 1033-1038 doi:10.1180/minmag.2017.081.062DOI: 10.1180/minmag.2017.081.062
  2. 2019Lee, S., Xu, H., Xu, H., Jacobs, R., Morgan, D. (2019) Valleyite: A new magnetic mineral with the sodalite-type structure. American Mineralogist: 140(9): 1238-1245.
  3. 2020(2020) Valleyite. Handbook of Mineralogy. Mineralogical Society of America
Cite this entry
@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Valleyite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/valleyite-51963},
  note      = {Accessed 2026-05-11}
}