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Neutron Diffraction Studies of α‐FeOOH
Author(s) -
Szytuła A.,
Burewicz A.,
Dimitrijević Ž.,
Kraśnicki S.,
Rżany H.,
Todorović J.,
Wanic A.,
Wolski W.
Publication year - 1968
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.19680260205
Subject(s) - neutron diffraction , antiferromagnetism , spins , monochromatic color , hematite , neutron , crystallography , materials science , powder diffraction , goethite , diffraction , chemistry , analytical chemistry (journal) , mineralogy , optics , condensed matter physics , crystal structure , physics , nuclear physics , chromatography , adsorption
Neutron spectrometric investigations are made of goethite (α‐FeOOH) of mineralogical and synthetic origin (α‐FeOOH of natural isotopic composition) and also of α‐FeOOD using a monochromatic neutron beam of λ = 1.12 Å. Some powder diffraction patterns in the temperature range from −190 to +120°C are measured. The obtained coordinates for all atoms (including those for hydrogen) in the unit cell are given. The existence of antiferromagnetic spin ordering at temperatures below +80°C is observed. A model is proposed in which the spins are aligned parallel to the b ‐axis.