This PR addresses issue #37 by allowing the Lattice key to be missing from the comment line providing pbc="F F F", i.e. open boundary conditions. The cell is then taken to be a minimal bounding box. After this change the behavour is consistent with the beahviour expected in the ExtXYZ specification as described at https://github.com/libAtoms/extxyz.
cc @cortner - if you have time to take a quick look and check that this fixes your issue that would be great.
This PR addresses issue #37 by allowing the Lattice key to be missing from the comment line providing
pbc="F F F"
, i.e. open boundary conditions. The cell is then taken to be a minimal bounding box. After this change the behavour is consistent with the beahviour expected in the ExtXYZ specification as described at https://github.com/libAtoms/extxyz.cc @cortner - if you have time to take a quick look and check that this fixes your issue that would be great.