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| Sn1—I1 | 3.1596 (3) | Sn1—I3 | 3.1310 (5) |
| Sn1—I2 | 3.1129 (1) | Sn1—I3i | 3.0491 (5) |
| I1—Sn1—I2 | 89.374 (6) | I2—Sn1—I3 | 84.077 (6) |
| I1—Sn1—I2ii | 90.984 (6) | I1—Sn1—I3i | 88.269 (7) |
| I1—Sn1—I1ii | 176.539 (14) | I2—Sn1—I3i | 95.923 (6) |
| I2—Sn1—I2ii | 168.154 (12) | I3—Sn1—I3i | 180.0 |
| I1—Sn1—I3 | 91.731 (7) |
Symmetry codes: (i) 
; (ii) 
.
