Tistarite

Tistarite is an exceedingly rare mineral with the formula Ti2O3, thus being the natural analogue of titanium(III) oxide.[3][2] In terms of chemistry it is the titanium-analogue of hematite, corundum, eskolaite, and karelianite. Other minerals with the general formula A2O3 are arsenolite, avicennite, claudetite, bismite, bixbyite, kangite, sphaerobismoite, yttriaite-(Y) and valentinite. Tistarite and grossmanite - both found in the famous Allende meteorite (so is kangite) - are the only currently known minerals with trivalent titanium. Titanium in minerals is almost exclusively tetravalent.[2][4][5] The only known terrestrial occurrence of tistarite was found during minerals exploration by Shefa Yamim Ltd. in the upper mantle beneath Mount Carmel, Israel.[6][7]

Tistarite
General
CategoryOxide minerals
Formula
(repeating unit)		Ti2O3
IMA symbolTta[1]
Strunz classification4.CB.05
Crystal systemTrigonal
Crystal classHexagonal scalenohedral (3m)
H-M symbol: (3 2/m)
Space groupR3c
Identification
References[2]

References
  1. Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
  2. Mindat, Tistarite, http://www.mindat.org/min-38695.html
  3. Ma, C., and Rossmann, G.R., 2009: Tistarite, Ti2O3, a new refractory mineral from the Allende meteorite. American Mineralogist 94(5-6), 841-844
  4. Mindat, Kangite, http://www.mindat.org/min-42879.html
  5. Mindat, Yttriaite-(Y), http://www.mindat.org/min-40471.html
  6. W.L. Griffin, S.E.M. Gain, D.T. Adams, J-X. Huang, M. Saunders, V. Toledo, N.J. pearson, and S.Y. O'Reilly (2016), "First terrestrial occurrence of tistarite (Ti2O3): Ultra-low oxygen fugacity in the upper mantle beneath Mount Carmel, Israel" (PDF), Geology, Geological Society of America (published 2016-08-17), 44 (10): 815–818, Bibcode:2016Geo....44..815G, doi:10.1130/G37910.1, archived (PDF) from the original on 2016-09-12, retrieved 2016-09-12 – via Shefa Yamim Ltd.{{citation}}: CS1 maint: uses authors parameter (link)
  7. J-Wire Staff (2016-02-21). "Australian university confirms Israeli rare mineral discovery". J-Wire. Archived from the original on 2016-02-22. Retrieved 2016-09-12.{{cite web}}: CS1 maint: uses authors parameter (link)
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