I’m writing to have some questions about the crystallographic information of Fe2B(ID:mp-1915).
It is shown that the Hermann Mauguin of Fe-B is I4/mcm[140],which is also conforms to the fact that the crystal system shown is a tetragonal crystal system. But it is also shown that the lattice parameters is a = b= c and α=β=γ≠ 90°, which does not conform to the definition of a tetragonal crystal system .and it seems that the model given is not a tetragonal crystal system.
So I would like to ask if there are any errors in the lattice parameters or if there are errors in the Hermann Mauguin and crystal system? Or is it due to my insufficient knowledge reserve that there are some problems in understanding the information?