From mystery to modulation: the structural story of Rb2[Si2O5].
The crystal structure of Rb2[Si2O5], a phyllosilicate with previously questionable structural details, has been solved and refined as an incommensurately modulated phase in (3 + 1)-dimensional superspace. This paper describes the monoclinic structure in superspace group C2/c(0β0)s0 with unit-cell parameters a = 9.8662 ...