Skip to main content
Open Access Publications from the University of California

Magnetic and nuclear structure of goethite (α-FeOOH): A neutron diffraction study

  • Author(s): Zepeda-Alarcon, E
  • Nakotte, H
  • Gualtieri, AF
  • King, G
  • Page, K
  • Vogel, SC
  • Wang, HW
  • Wenk, HR
  • et al.

© 2014 International Union of Crystallography. The magnetic structure of two natural samples of goethite (α-FeOOH) with varying crystallinity was analyzed at 15 and 300 K by neutron diffraction. The well crystallized sample has the Pb′nm color space group and remained antiferromagnetic up to 300 K, with spins aligned parallel to the c axis. The purely magnetic 100 peak, identifying this color space group, was clearly resolved. The nanocrystalline sample shows a phase transition to the paramagnetic state at a temperature below 300 K. This lowering of the Néel temperature may be explained by the interaction of magnetic clusters within particles. The nuclear structure, refined with the Rietveld and pair distribution function methods, is consistent with reports in the literature.

Many UC-authored scholarly publications are freely available on this site because of the UC Academic Senate's Open Access Policy. Let us know how this access is important for you.

Main Content
Current View