Table 2. Selected bond lengths (Å) for (II) .
| Rb1—O1W | 2.924 (2) | Rb1—O13i | 2.874 (2) |
| Rb1—O11 | 3.050 (2) | Rb1—O13ii | 2.894 (2) |
| Rb1—O13 | 2.832 (2) | Rb1—O14iii | 2.842 (2) |
Symmetry codes: (i) 
; (ii) 
; (iii) 
.
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