Prediction of ferroelectricity in recent inorganic crystal structure database entries under space group pba2. Erratum

The x coordinate for N8 in Table 1 on p. 807 [Abrahams, Mirsky & Nielson, Acta Cryst. (1996), B52, 806-809] was incorrectly quoted as 0.567 (9). The correct value is 0.0567 (9). The correct value is 0.0567 (9).