HoNi2P2
Reehuis, M.Vomhof, T.Jeitschko, W.
Journal of the Less-Common Metals (1991) 169, 139-145
a=3.8484Å b=3.8484Å c=9.338Å
α=90° β=90° γ=90°
Ni2P2Tb
a=3.8693Å b=3.8693Å c=9.361Å