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A new H‐bonded (H2O)38 water cluster was identified in a mixed‐valent cerium dipicolinate complex [CeIV(dipic)3CeIII(H2O)8][CeIV(dipic)3CeIII(H2O)7CeIV(dipic)3] · 20H2O (dipicH2=dipicolinic acid). Such a large cluster built around an inversion centre and occupying 20% of the unit cell volume is supported by the bulky acceptor rich complex ions in the crystal lattice. The compound crystallises in the triclinic crystal system with space group P1¯ and unit cell parameters; a=16.5285(9) Å, b=17.1905(10) Å, c=19.5220(11) Å, α=76.0440(10)°, β=79.0180(10)°, γ=65.6370(10)°, V=4877.7(5) Å3.
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Prasad et al. (2008) studied this question.
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