Neutron Diffraction Studies of α‐FeOOH
A. SzytułaLaboratory of Structure Research of the Jagiellonian University, CracowAndrzej BurewiczŽ. DimitrijevićInstitute of Nuclear Sciences “Boris Kidrič”, VinčaS. KraśnickiInstitute of Nuclear Physics, CracowH. RżanyInstitute of Nuclear Physics, CracowJelena TodorovićInstitute of Nuclear Sciences “Boris Kidrič”, VinčaA. WanicInstitute of Nuclear Physics, CracowW. Wolski
ABI
Аннотация
Abstract 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.
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