/usr/share/psi/python/grendel/chemistry/ is in psi4-data 1:0.3-5.
This file is owned by root:root, with mode 0o755.
..
/usr/share/psi/python/grendel/chemistry/__init__.py
/usr/share/psi/python/grendel/chemistry/atom.py
/usr/share/psi/python/grendel/chemistry/derivative_properties.py
/usr/share/psi/python/grendel/chemistry/element.py
/usr/share/psi/python/grendel/chemistry/element_data.py
/usr/share/psi/python/grendel/chemistry/gen_element_data.m
/usr/share/psi/python/grendel/chemistry/get_element_data.py
/usr/share/psi/python/grendel/chemistry/isotopes.txt
/usr/share/psi/python/grendel/chemistry/mathematica_data.txt
/usr/share/psi/python/grendel/chemistry/molecular_properties.py
/usr/share/psi/python/grendel/chemistry/molecule.py
/usr/share/psi/python/grendel/chemistry/molecule_dict.py
/usr/share/psi/python/grendel/chemistry/molecule_stub.py