Feiite

Fe2+2(Fe2+Ti4+)O5
IMA status
  • Approved
  • Pending publication
IMA symbol
Fei
IMA approved
2018
Also known as
  • Feiiet
  • IMA2017-041a

Where it forms, where it's found

Type locality
Shergotty Martian meteorite
  1. Gaya District
  2. Bihar
  3. India

24.5500°, 84.8333°

1recorded occurrences
Source · OpenStreetMap

Crystallography

Crystal system
Orthorhombic
Space group
Cmcm
Cell parameters
a = 2.90(3) Å · b = 10.25(20) Å · c = 12.50(8) Å
Ratio a:b:c
1 : 3.534 : 4.310
Crystal structure

Chemical composition

Constituent elements
Mass composition breakdown
ElementAtoms At. mass g/mol Mass g/molMass share
26FeIronIron355.845167.535
56.72%
8OOxygenOxygen515.99979.995
27.08%
22TiTitaniumTitanium147.86747.867
16.20%
Total295.397100.00%

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

From IMA formula

Synonyms

  • Feiiet
  • IMA2017-041a

In other languages

German
Feiit · IMA 2017-041a

Classification

Strunz
10th ed.

4.BB.35

  • 4OxidesClass
  • 4.BMetal: Oxygen = 3:4 and similarDivision
  • 4.BBWith only medium-sized cationsGroup
  • 4.BB.35FeiiteSpecies

Literature, links & citation

Citations
  1. 2018Hålenius, Ulf, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2018) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) NEWSLETTER 46. European Journal of Mineralogy, 30 (6) 1181-1189 doi:10.1127/ejm/2018/0030-2819DOI: 10.1127/ejm/2018/0030-2819
  2. 2021Ma, C., Tschauner, O., Beckett, J.R., Prakapenka, V. (2021) Discovery of Feiite (Fe2+2(Fe2+Ti4+)O5) and Liuite (GdFeO3-Type FeTiO3), Two New Shock-Induced, High-Pressure Minerals in the Martian Meteorite Shergotty. 52nd Lunar and Planetary Science Conference, held virtually, 15-19 March, 2021. LPI Contribution No. 2548, id.1681.
  3. 2022(2022) Feiite. Handbook of Mineralogy. Mineralogical Society of America
  4. 2023Prissel, Kelsey, Fei, Yingwei, Strobel, Timothy A. (2023) Feiite: Synthesis, stability, and implications for its formation conditions in nature. American Mineralogist, 108 (7) 1315-1321 doi:10.2138/am-2022-8633DOI: 10.2138/am-2022-8633
Cite this entry
@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Feiite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/feiite-53252},
  note      = {Accessed 2026-05-11}
}