Ahrensite Ma C, Tschauner O, Beckett J R, Liu Y, Rossman G R, Sinogeikin S V, Smith J S, Taylor L A Geochimica et Cosmochimica Acta 184 (2016) 240-256 Ahrensite, gamma-Fe2SiO4, a new shock-metamorphic mineral from the Tissint meteorite: Implications for the Tissint shock event on Mars Locality: Tissint meteorite _database_code_amcsd 0021229 8.1629 8.1629 8.1629 90 90 90 *Fd3m .125 .125 .125 atom x y z occ Biso Fe .5 .5 .5 .56 .55 Mg .5 .5 .5 .43 .55 Si .5 .5 .5 .03 .55 Si .125 .125 .125 .98 .23 Fe .125 .125 .125 .03 .23 O .748 .748 .748 .25