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| K1—O1 | 2.828 (2) | K1—O3ii | 2.682 (2) |
| K1—O2i | 3.056 (3) | K1—O4iii | 3.069 (3) |
Symmetry codes: (i) x, -y, z-{\script{1\over 2}}; (ii) -x+{\script{1\over 2}}, y-{\script{1\over 2}}, -z-{\script{1\over 2}}; (iii) x+{\script{1\over 2}}, -y-{\script{1\over 2}}, z-{\script{1\over 2}}.
