摘要
列举１６ 例按Ｐ１ 解出的晶体结构，其空间群应描述为单斜晶系的Ｃ２／ｃ，并讨论从Ｐ１ 修正为三方的Ｒ３ 和四方的Ｉ４１／ａ 的晶体结构各１ 例。分析揭示判断失误的线索。最后强调在结构报告中完整发表原子坐标数据的重要意义。
We present 16 structures that were original described as \$P\$1 but are properly described as monoclinic \$C2/c,\$ and one revised from \$P\$1 to triganal \$R\$3 as well as the other one from P 1 to tetragonal I4\-1/a. The clues for correction of symmetry are analysed, and the great importance of publishing the full atomic coordinates in a structural report is emphasized.\;
