Fe2NiP crystallizes in the tetragonal I-4 space group. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 2-coordinate geometry to five equivalent Ni(1) and two equivalent P(1) atoms. In the second Fe site, Fe(2) is bonded in a 4-coordinate geometry to three equivalent Ni(1) and four equivalent P(1) atoms. Ni(1) is bonded in a 13-coordinate geometry to three equivalent Fe(2), five equivalent Fe(1), two equivalent Ni(1), and three equivalent P(1) atoms. P(1) is bonded in a 9-coordinate geometry to two equivalent Fe(1), four equivalent Fe(2), and three equivalent Ni(1) atoms.
Fe2NiP crystallizes in the tetragonal I-4 space group. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 2-coordinate geometry to five equivalent Ni(1) and two equivalent P(1) atoms. There are a spread of Fe(1)-Ni(1) bond distances ranging from 2.50-2.85 Å. There is one shorter (2.32 Å) and one longer (2.36 Å) Fe(1)-P(1) bond length. In the second Fe site, Fe(2) is bonded in a 4-coordinate geometry to three equivalent Ni(1) and four equivalent P(1) atoms. There are a spread of Fe(2)-Ni(1) bond distances ranging from 2.51-2.62 Å. There are a spread of Fe(2)-P(1) bond distances ranging from 2.29-2.33 Å. Ni(1) is bonded in a 13-coordinate geometry to three equivalent Fe(2), five equivalent Fe(1), two equivalent Ni(1), and three equivalent P(1) atoms. Both Ni(1)-Ni(1) bond lengths are 2.66 Å. There are a spread of Ni(1)-P(1) bond distances ranging from 2.20-2.37 Å. P(1) is bonded in a 9-coordinate geometry to two equivalent Fe(1), four equivalent Fe(2), and three equivalent Ni(1) atoms.