Figure 18
Part of the crystal structure of (1), showing the formation of a chain of spiro-fused rings along [010] built from cations and water molecules only. The O atoms marked with an asterisk (*), a hash (#) or a dollar sign ($) are at the symmetry positions (1 - x, 1 - y, 1 - z), (x, 1 + y, z) and (x, -1 + y, z), respectively, and atoms Ca1*, Ca1# and Ca1$ are at the positions (½, ½, ½), (½, , ½) and (½, −½, ½), respectively. |