I looked at it and still is somewhat confused.
I'm interested in cell basis vectors for truncated octahedron.
it seems like they are defined as follows (if I understood the meaning of XTLABC array correctly)
A = (a, -a/5, -a/5)
B = (-a/5, a, -a/5)
C = (-a/5, -a/5, a)
these vectors do have correct angles between them, but at the same time they are not of appropriate length. I mean, aren't cell basis vectors supposed to be of length a?
If anyone can clarify this matter I'd greatly appreciate it.