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Category Sulfide mineral
(repeating unit)
References [1]

Wassonite is an extremely rare sulfide mineral with chemical formula TiS.[1][2] Its discovery was announced in a 2011 NASA press release as a single small grain within an enstatite chondrite meteorite called "Yamato 691", which was found during a 1969 Japanese expedition to Antarctica.[3] This grain represents the first observation in nature of the synthetic compound titanium(II) sulfide.

The mineral was named after John T. Wasson, a professor at the University of California, Los Angeles and was approved by the International Mineralogical Association.[4][5]


  1. ^ a b Mindat.org
  2. ^ Dwayne C. Brown, William Jeffs (2011-04-05). "Scientists Find New Type Of Mineral In Historic Meteorite". NASA. Retrieved 2011-04-07. 
  3. ^ Bryner, Jeanna (2011-04-06). "4.5-Billion-Year-Old Antarctic Meteorite Yields New Mineral". LiveScience. Retrieved 2011-04-07. 
  4. ^ "Scientists Find New Type of Mineral in Historic Meteorite". Science Daily. 2011-04-05. Retrieved 2011-04-07. 
  5. ^ Nakamura-Messenger, K., Clemett, S.J., Rubin, A., Choi, B.-G., Keller, L.P., Zhang, S., Rahman, Z. and Oikawa, K. (April 2011). "Wassonite, IMA 2010-074". CNMNC Newsletter (8): 293.