Citation: Blake, N.P.; Stucky, G.D.; Latturner, S.; Bryan, D.; Mollnitz, L.; Metiu, H. (2001). Structure and stability of the clathrates Ba8 Ga16 Ge30, Sr8 Ga16 Ge30, Ba8 Ga16 Si30, and Ba8 In16 Sn30. Journal of Chemical Physics, 114, pp. 10063-10074.