This system can describe infinite kinds of nonclassical periodic structures,especially for those with locally n-fold rotational symmetries forbidden by the rules of the classical crystallography.

• 该体系能描述无穷多类非经典周期结构，特别是一些经典晶体群规则所不允许的具有局部5，8，10或12次旋转对称的周期结构。