Ditellurium decafluoride was widely reported in the literature[1][2][3] but what was believed to be Te2F10 has been shown to be teflic anhydride, F5TeOTeF5.[4] An account as to how this error occurred was made by P. M. Watkins.[5]
If it existed, it would be valence isoelectronic with disulfur decafluoride, and have a similar structure.