Acta Crystallographica Section A

Foundations of Crystallography

Volume 58, Part 1 (January 2002)

addenda and errata

Acta Cryst. (2002). A58, 79 [ doi:10.1107/S0108767301016713 ]

Nomenclature of magnetic, incommensurate, composition-changed morphotropic, polytype, transient-structural and quasicrystalline phases undergoing phase transitions. II. Report of an IUCr Working Group on Phase Transition Nomenclature. Erratum

J.-C. Tolédano, R. S. Berry, P. J. Brown, A. M. Glazer, R. Metselaar, D. Pandey, J. M. Perez-Mato, R. S. Roth and S. C. Abrahams

Abstract: Six printing errors are corrected in the Report by Tolédano et al. [Acta Cryst. (2001), A57, 614-626]. The first is in §2.1, the fourth last sentence of which should read ``Although such nicknames do not always describe the magnetic character of the substance explicitly, since `AF' for example may be mistaken for antiferroelectric, this lack is compensated for by the fifth and sixth fields (see the examples in §§3.1-3.5 ).'' The second is in §3.4, second field of the AF phase, which should read `<260 K'. The third is in §4.5, the final sentence of which should be `However, certain materials display ferroic properties in the incommensurate phase (cf. §5.3)'. The fourth is in §5.1, sixth field of phase II, which should read `Incommensurate. Modulation: [delta] ~ 0.78. Displacive modulation.'. The fifth is in §6, the third sentence of which should read ``While accepting this definition, it is necessary to point out, however, that the boundary between phases in the examples below need not be `thermodynamically abrupt' (i.e. involve a latent heat and discontinuities in the physical quantities).''. The final error is in §6.1, sixth field of the FT phase, which should read `FT | 0.45 < x < 1 | P4mm (99) | Z = 1 | Ferroelectric and ferroelastic | All phases pseudo-cubic perovskites. No perovskite octahedral tilts; 6 variants.'.

Keywords: phase transition; nomenclature.