3D framework含有孔洞,空隙率用platon算,但如何算孔洞大小,文献里经常报道 a hole with an aperture approximately 2× 7A, excluding the van der Waals radii.或者the largest cross-section of the pore are approximately 2× 7A, 两种算法一样吗?通常用什么软件算,Diamonde可以吗,也有听说在diamonde里加dumuy 原子,具体如何操作,求详解,多谢多谢!!!