/usr/share/libavogadro/ is in avogadro-data 1.2.0-1+deb9u1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/libavogadro/shaders/
/usr/share/libavogadro/shaders/clip.frag
/usr/share/libavogadro/shaders/clip.vert
/usr/share/libavogadro/shaders/gooch.frag
/usr/share/libavogadro/shaders/gooch.vert
/usr/share/libavogadro/shaders/light.frag
/usr/share/libavogadro/shaders/light.vert
/usr/share/libavogadro/shaders/marble.frag
/usr/share/libavogadro/shaders/marble.vert
/usr/share/libavogadro/shaders/per-pixel-lighting.frag
/usr/share/libavogadro/shaders/per-pixel-lighting.vert
/usr/share/libavogadro/shaders/per_pixel2.frag
/usr/share/libavogadro/shaders/per_pixel2.vert
/usr/share/libavogadro/shaders/phong-use-diffuse.frag
/usr/share/libavogadro/shaders/phong-use-diffuse.vert
/usr/share/libavogadro/shaders/phong.frag
/usr/share/libavogadro/shaders/phong.params
/usr/share/libavogadro/shaders/phong.vert
/usr/share/libavogadro/shaders/plasma.frag
/usr/share/libavogadro/shaders/plasma.vert
/usr/share/libavogadro/shaders/x-ray-cryos.frag
/usr/share/libavogadro/shaders/x-ray-cryos.params
/usr/share/libavogadro/shaders/x-ray-cryos.vert
/usr/share/libavogadro/shaders/x-ray.frag
/usr/share/libavogadro/shaders/x-ray.params
/usr/share/libavogadro/shaders/x-ray.vert