Neutron Diffraction Studies of ß-FeOOH

A synthetic polycrystalline sample of β-FeOOH was investigated by means of X-ray and thermal neutron diffraction. The classification of β-FeOOH as belonging to the tetragonal system was confirmed and a set of coordinates of iron, oxygen, and hydrogen atoms in the unit cell is given. The spin ordering determined is of the layer kind: the magnetic moments in the particular layers are coupled ferromagnetically parallel to the co-axis and antiferromagnetically between the layers.

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