Notes

¹Established 15 February 1994 by the IUCr Commission on Crystallographic Nomenclature; following the resignation of two members upon acceptance of the first Report, three new members were appointed 18 July 1998. This second Report was received by the Commission 26 February 2001 and accepted 19 April 2001. The present Report, as all other Reports of the Commission, is available online at the Commission's webpage: http://www.iucr.org/iucr-top/comm/cnom.html .

⁺Chairman of IUCr Working Group.

⁺⁺Ex officio, International Union of Pure and Applied Physics.

⁺⁺⁺Ex officio, International Union of Pure and Applied Chemistry.

⁺⁺⁺⁺Ex officio, IUCr Commission on Crystallographic Nomenclature.

²See footnote to paper title.

³See footnotes 4 for the third and fourth, 5 for the sixth and 6 for the fifth fields as defined in Report I. Second field, Report I: If the phase is stable over a thermal range, then the temperature limits should be given in kelvins; if over a pressure range, in pascals. SI prefixes should be used as required. If no pressure range is indicated, the observations correspond to atmospheric pressure; similarly, if no temperature range is indicated, the observations correspond to room temperature.

⁴See footnotes 3 for the second, 5 for the sixth and 6 for the fifth fields as defined in Report I. Third field, Report I: The space-group symbol and number of the phase, as used in International Tables for Crystallography (1996), should be given. When incomplete crystallographic information is available, these data may be replaced by specifying the point group (e.g. 4mm) or the crystal system (e.g. tetragonal). Fourth field, Report I: The number of chemical formula units per conventional cell should be entered; if undetermined, the field should contain only a dash. The (tripled) hexagonal unit-cell setting in rhombohedral systems should be used.

⁵See footnotes 3 for the second, 4 for the third and fourth, and 6 for the fifth fields as defined in Report I. Sixth field, Report I: If the phase crystallizes with a standard structure type, then the sixth field should begin with an entry in the format | Type = XXXX. Typical structure type names are, for instance, XXXX = NaCl, pyrite, sphalerite, etc., with the name in italics or, alternatively, structure-type formulas such as XXXX = GXX ', T3(T'/L)X4 etc. with the formula in italics.

⁶See footnotes 3 for the second, 4 for the third and fourth, and 5 for the sixth fields as defined in Report I. Fifth field, Report I: Contains the name of the ferroic property exhibited by the phase, see Clark et al. (1994). If this property has not actually been observed experimentally but is nevertheless probable on crystallographic grounds, a comment indicating this situation should be added in the sixth field. An unknown property is denoted by a dash (see e.g. §7.4.1).