A type of crystal twinning in which one crystal divides into two along a twin plane, giving a twinned crystal in the shape of a ‘V’ or swallowtail. The mineral gypsum may develop this twinned form.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。