Fe2SiS4 Vincent H, Bertaut E Acta Crystallographica B32 (1976) 1749-1755 Polyhedral deformations in olivine-type compounds and the crystal structure of Fe2 Si S4 and Fe2 Ge S4 _cod_database_code 1008006 _database_code_amcsd 0015954 12.407 7.198 5.812 90 90 90 Pnma atom x y z S1 .4079 .25 .7284 S2 .5692 .25 .2383 S3 .3335 .0173 .2487 Si1 .4111 .25 .0916 Fe1 0 0 0 Fe2 .2299 .25 .5098