Figure 1
From: The dipole moment of the spin density as a local indicator for phase transitions
Part of the magnetite unit cell in the monoclinic crystal structure.
Oxygen atoms are drawn as small red spheres. Iron ions on different octahedral sites are drawn as large grey (B1), brown (B2), green (B3) and blue spheres (B4). The linear three-site structure B3–B1–B3 forms a trimeron with reduced B1–B3 bond lengths. The axes of the global coordinate system are also shown.
