/usr/share/avogadro/crystals/other/ is in avogadro-data 1.2.0-1+deb9u1.
This file is owned by root:root, with mode 0o755.
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/usr/share/avogadro/crystals/other/(NH4)MgPO4-6(H2O)-Struvite.cif
/usr/share/avogadro/crystals/other/C10H10Fe-Ferrocene.cif
/usr/share/avogadro/crystals/other/Ca2C4O10H2.57-Oxalate-Whewellite.cif
/usr/share/avogadro/crystals/other/CaC2O6.375H6-Oxalate-Weddellite.cif
/usr/share/avogadro/crystals/other/FeMnO3-Bixbyite.cif
/usr/share/avogadro/crystals/other/H3N-Ammonia.cif
/usr/share/avogadro/crystals/other/LaAlO3.cif
/usr/share/avogadro/crystals/other/LiNbO3-LithiumNiobate.cif
/usr/share/avogadro/crystals/other/Pb1Ti0.35Zr0.65O3-PZT-cub.cif
/usr/share/avogadro/crystals/other/Pb1Ti0.35Zr0.65O3-PZT-rhomb.cif
/usr/share/avogadro/crystals/other/YBa2Cu3O6.9-YBCO.cif