/usr/share/avogadro/crystals/oxides/ is in avogadro-data 1.2.0-1+deb9u1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/avogadro/crystals/oxides/(MgAl2)O4-Spinel.cif
/usr/share/avogadro/crystals/oxides/Ag2O.cif
/usr/share/avogadro/crystals/oxides/AgO.cif
/usr/share/avogadro/crystals/oxides/Al2O3-Corundum.cif
/usr/share/avogadro/crystals/oxides/BaO.cif
/usr/share/avogadro/crystals/oxides/CaO-Lime.cif
/usr/share/avogadro/crystals/oxides/CdO-Monteponite.cif
/usr/share/avogadro/crystals/oxides/CeO2-Cerianite.cif
/usr/share/avogadro/crystals/oxides/CoFe2O4.cif
/usr/share/avogadro/crystals/oxides/CoO.cif
/usr/share/avogadro/crystals/oxides/Cr2O3-Eskolaite.cif
/usr/share/avogadro/crystals/oxides/Cu2O-Cuprite.cif
/usr/share/avogadro/crystals/oxides/CuO-Tenorite.cif
/usr/share/avogadro/crystals/oxides/Fe2O3-Hematite.cif
/usr/share/avogadro/crystals/oxides/Fe3O4-Magnetite.cif
/usr/share/avogadro/crystals/oxides/FeO-Wustite.cif
/usr/share/avogadro/crystals/oxides/GeO2-Argutite-tetrag.cif
/usr/share/avogadro/crystals/oxides/GeO2-Argutite.cif
/usr/share/avogadro/crystals/oxides/GeO2.cif
/usr/share/avogadro/crystals/oxides/HfO2.cif
/usr/share/avogadro/crystals/oxides/In2O3-IndiumOxide.cif
/usr/share/avogadro/crystals/oxides/In2O3.cif
/usr/share/avogadro/crystals/oxides/IrO2.cif
/usr/share/avogadro/crystals/oxides/K2O.cif
/usr/share/avogadro/crystals/oxides/La2O3-LanthanumOxide-A.cif
/usr/share/avogadro/crystals/oxides/Li2O.cif
/usr/share/avogadro/crystals/oxides/MgO-Periclase.cif
/usr/share/avogadro/crystals/oxides/MnO-Manganosite.cif
/usr/share/avogadro/crystals/oxides/MnO2-Pyrolusite.cif
/usr/share/avogadro/crystals/oxides/MoO2-Tugarinovite.cif
/usr/share/avogadro/crystals/oxides/MoO3-Molybdite.cif
/usr/share/avogadro/crystals/oxides/Na2O.cif
/usr/share/avogadro/crystals/oxides/NbO.cif
/usr/share/avogadro/crystals/oxides/NbO2.cif
/usr/share/avogadro/crystals/oxides/NiFe2O4.cif
/usr/share/avogadro/crystals/oxides/NiO-Bunsenite.cif
/usr/share/avogadro/crystals/oxides/PbO.cif
/usr/share/avogadro/crystals/oxides/PbO2-Scrutinyite.cif
/usr/share/avogadro/crystals/oxides/PdO.cif
/usr/share/avogadro/crystals/oxides/PtO2-beta.cif
/usr/share/avogadro/crystals/oxides/Rb2O.cif
/usr/share/avogadro/crystals/oxides/Rh2O3.cif
/usr/share/avogadro/crystals/oxides/RuO2.cif
/usr/share/avogadro/crystals/oxides/Sc2O3.cif
/usr/share/avogadro/crystals/oxides/SiO2-Coesite.cif
/usr/share/avogadro/crystals/oxides/SiO2-Cristobalite.cif
/usr/share/avogadro/crystals/oxides/SiO2-Quartz-alpha.cif
/usr/share/avogadro/crystals/oxides/SiO2-Quartz-beta.cif
/usr/share/avogadro/crystals/oxides/SiO2-Stishovite.cif
/usr/share/avogadro/crystals/oxides/SmO.cif
/usr/share/avogadro/crystals/oxides/SnO.cif
/usr/share/avogadro/crystals/oxides/SnO2-Cassiterite.cif
/usr/share/avogadro/crystals/oxides/SrO.cif
/usr/share/avogadro/crystals/oxides/TaO.cif
/usr/share/avogadro/crystals/oxides/TiO2-Anatase.cif
/usr/share/avogadro/crystals/oxides/TiO2-Brookite.cif
/usr/share/avogadro/crystals/oxides/TiO2-Rutile.cif
/usr/share/avogadro/crystals/oxides/UO.cif
/usr/share/avogadro/crystals/oxides/UO2-Uraninite.cif
/usr/share/avogadro/crystals/oxides/V2O3-Karelianite.cif
/usr/share/avogadro/crystals/oxides/V2O5-Shcherbinaite.cif
/usr/share/avogadro/crystals/oxides/VO.cif
/usr/share/avogadro/crystals/oxides/VO2.cif
/usr/share/avogadro/crystals/oxides/WO2.cif
/usr/share/avogadro/crystals/oxides/Y2O3.cif
/usr/share/avogadro/crystals/oxides/YbO.cif
/usr/share/avogadro/crystals/oxides/ZnO-Zincite.cif
/usr/share/avogadro/crystals/oxides/ZrO.cif
/usr/share/avogadro/crystals/oxides/ZrO2-Cubic.cif