A deeper insight into strain for the sila-bi[6]prismane ( Si18H12) cluster with its endohedrally trapped silicon atom, Si19H12. - Holger Vach; Lena V. Ivanova; Qadir K. Timerghazin; Fatme Jardali; Ha-Linh Thi Le (J. Comput. Chem., 2015)