English Vocabulary Flash Cards - Chemical Formulas @ englishpdf.com and englishteststore.com File 117 FeS2 pyrite or iron(IV) sulfide FeSe iron(II) selenide FeTe iron(II) telluride FeTiO3 iron(II) metatitanate FeVO4 iron(III) orthovanadate FeWO4 iron(II) orthotungstate FeZrO3 iron(II) metazirconate Fe2I2 diiron diiodide