(Studying Coordination Chemistry, "Crystal Field Theory" at school)

Apparently, different sources spell this differently.

The Wikipedia article on Crystal Field Stabilization Energy, calls it the "Barycenter" (as does my school textbook)

However, the actual Wikipedia article on the "Barycenter" refers to, (as far as I can tell) the center of mass of two mutually orbiting bodies. Whereas the "Bary/Baricenter" I'm talking about is the zero-energy reference level in octahedral complexes.

Another book I have at hand (Concise Inorganic Chemistry Lee, J.D), prominently uses the term "Bari centre".

The center/centre distinction aside, what I've been able to glean from my books (and the internet), is that this term is spelled in four different ways (Wah! Such gross inconsistency in literature!):

• Barycenter
• Bary center
• Baricenter
• Bari center

But which one's correct (or at least, a more preferred term in Chemistry-literature)?