Electron microscope analyses of domains and discommensurations in ferroelectric Rb₂ZnCl₄. Erratum

The following corrections should be made in Tsuda, Yamamoto & Yagi [Acta Cryst. (1988). A44, 864-870]. (1) 'only two kinds of domain boundaries' in the Abstract should be changed to 'two kinds of image contrast of domain boundaries'. (2) The expressions for h₂, h₄, h₆ in § 4.1 should be replaced by h₂: -x -y -z + 2/3 h₄: -x -y -z (inversion) h₆: -x -y -z + 1/3 (3) "two kinds of DC's showing different contrast' in the second paragraph in § 4.1 should be changed to 'two kinds of DC contrast'.