Ker, A.Ratcliffe, C. I.Rousseau, R.Tse, J. S.Uehara, K.2004-12-142004-12-1420012001http://hdl.handle.net/2003/1903110.17877/DE290R-6785enThe American Physical SocietyPhysical Review Letters530Structural Principles and Amorphouslike Thermal Conductivity of Na-Doped Si Clathrates10.1103/PhysRevLett.86.4980article (journal)