Citation: Hughes, J. M.; Rakovan, J. F.; Bracco, R.; Gunter, M. E. (2003). The atomic arrangemetn of the ganophyllite-group modulated layer silicates as determined from the orthorhombic dimorph of tamaite, with the elusive 16.8 A ganophyllite-group superstructure revealed Note: signs of the y-coordinates for O24 and O25 have been changed. American Mineralogist, 88, pp. 1324-1330.