Citation: Barth, Tom F. W.; Posnjak, E. (1932). Silicate structures of the cristobalite type: III. Structural relationship of high-cristobalite, \a-Carnegieite, and Na~2~SiO~4~. Zeitschrift fuer Kristallographie, Kristallgeometrie, Kristallphysik,Kristallchemie (-144,1977), 81, pp. 376-385.