tellurium hexafluoride 243.89664 [TeF6] F[Te](F)(F)(F)(F)F CHEBI:30469 hexafluoridotellurium NNCGPRGCYAWTAF-UHFFFAOYSA-N tellurium(6+) fluoride tellurium(VI) fluoride 241.59042 F6Te TeF6 chebi_ontology CAS:7783-80-4 InChI=1S/F6Te/c1-7(2,3,4,5)6 0 tellurium hexafluoride MolBase:975 Gmelin:2601 tellurium coordination entity