Table 2. Mean Bond Distances, d/Å, Number of Distances, N, Temperature Coefficients, b/Å2, and the Half-Height Full Width, l/Å, in the LAXS Studies of the Hydrated Alkali Metal Ions in Aqueous Solution at Room Temperature.
| species | interaction | N | d | b | l |
|---|---|---|---|---|---|
| Sodium Iodide in Water, 2.007 mol·dm–3 | |||||
| Na(OH2)6+ | Na–O | 6 | 2.43(2) | 0.025(2) | 0.22(1) |
| I– (aq) | I–O | 6 | 3.549(9) | 0.0180(8) | 0.19(1) |
| water bulk | O···O | 2 | 2.902(6) | 0.0220(10) | 0.21(1) |
| Potassium Iodide in Water, 2.002 mol·dm–3 | |||||
| K(OH2)7+ | K–O | 7 | 2.81(1) | 0.027(2) | 0.23(1) |
| I– (aq) | I–O | 6 | 3.539(7) | 0.0186(7) | 0.19(1) |
| water bulk | O···O | 2 | 2.889(7) | 0.0219(8) | 0.21(1) |
| Cesium Iodide in Water, 2.001 mol·dm–3 | |||||
| Cs(OH2)8+ | Cs–O | 8 | 3.081(1) | 0.031(2) | 0.25(1) |
| I– (aq) | I–O | 6 | 3.555(7) | 0.0191(7) | 0.19(1) |
| water bulk | O···O | 2 | 2.889(7) | 0.0212(8) | 0.21(1) |
| Cesium Hydoxide in Water, 1.802 mol·dm–3 | |||||
| Cs(OH2)8+ | Cs–O | 8 | 3.074(1) | 0.031(2) | 0.25(1) |
| OH– (aq) | O···O | 5 | 2.73(2) | 0.008(2) | 0.13(1) |
| O···O | 1 | 2.95 | 0.0225 | 0.21 | |
| water bulk | O···O | 2 | 2.898(7) | 0.0202(8) | 0.21(1) |