Kaitianite

Ti3+2Ti4+O5
IMA status
  • Approved
IMA symbol
Ktn
IMA approved
2018
Also known as
  • IMA2017-078a
  • Kaitianiet

Where it forms, where it's found

Type locality
Allende meteorite
  1. Pueblito de Allende
  2. Chihuahua
  3. Mexico

26.9667°, -105.3167°

2recorded occurrences
Source · OpenStreetMap

Crystallography

Crystal system
Monoclinic
Space group
C2/c
Cell parameters
a = 10.115 Å · b = 5.074 Å · c = 7.182 Å
Cell angles
β = 112.0 °
Ratio a:b:c
1 : 0.502 : 0.710
Z
4
Type-locality form

Occurs as two crystals, 0.3~0.6 μm × 3.6 μm and 0.2 μm × 1.1 μm, within one irregular grain in contact with tistarite and rutile, along with Ti3+-bearing corundum, Ti3+, Al, Zr-oxide, and Ti-bearing xifengite grains in a crack in the Allende matrix

Chemical composition

Constituent elements
Mass composition breakdown
ElementAtoms At. mass g/mol Mass g/molMass share
22TiTitaniumTitanium347.867143.601
64.22%
8OOxygenOxygen515.99979.995
35.78%
Total223.596100.00%

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

From IMA formula

Synonyms

  • IMA2017-078a
  • Kaitianiet

In other languages

German
IMA 2017-078a · Kaitianit

Classification

Strunz
10th ed.

4.CB.30

  • 4OxidesClass
  • 4.CMetal: Oxygen = 2: 3,3: 5, and similarDivision
  • 4.CBWith medium-sized cationsGroup
  • 4.CB.30KaitianiteSpecies

Group, growth & confusion

Commonly confused with
1 mineral

Literature, links & citation

Citations
  1. 1998Onoda, Masashige (1998) Phase Transitions of Ti3O5. Journal of Solid State Chemistry, 136. 67-73 doi:10.1006/jssc.1997.7657DOI: 10.1006/jssc.1997.7657
  2. 2019Ma, C. (2019) Discovery of Kaitianite, Ti3+2Ti4+O5, in Allende: A New Refractory Mineral from the Solar Nebula. Meteoritics and Planetary Science: 54(S2): 6098.
  3. 2020Ma, C., Beckett, J.R. (2020) Kaitianite, Ti3+2Ti4+O5 a new titanium oxide mineral from Allende. Meteoritics & Planetary Science: 1-12.
  4. 2021(2021) Kaitianite. Handbook of Mineralogy. Mineralogical Society of America
  5. 2023Ma, Chi, Cámara, Fernando, Bindi, Luca, Toledo, Vered, Griffin, William (2023) First Terrestrial Occurrence of Kaitianite (Ti3+2Ti4+O5) from the Upper Mantle beneath Mount Carmel, Israel. Minerals, 13 (8). 1097 doi:10.3390/min13081097DOI: 10.3390/min13081097
Cite this entry
@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Kaitianite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/kaitianite-52905},
  note      = {Accessed 2026-05-11}
}