We observed high proton conductivities of 1.2 x 10(-3) and 1.6 x 10(-3) S cm(-1) on Co[Cr(CN)(6)](2/3).zH(2)O and V[Cr(CN)(6)](2/3).zH(2)O, respectively, and an interference effect between magnetic ordering and ionic conduction below the magnetic phase transition temperature.

We prepared a vanadium heptacyanomolybdate-based magnet, V(II)(2)[Mo(III)(CN)(7)].(pyrimidine)(2).4.5H(2)O (VMo), with a Curie temperature (T(C)) of 110 K, which is the highest T(C) value in [Mo(III)(CN)(7)]-based magnets. Additionally, Mn(II)(2)[Mo(III)(CN)(7)].(pyrimidine)(2).2H(2)O (MnMo) of a monoclinic structure (P2(1)/n) with T(C) = 47 K was prepared to confirm the crystal structure of VMo.

Herein we prepared a three-dimensional nickel heptacyanomolybdate-based magnet, K0.6NiII1.7[MoIII(CN)7]·5.5H2O·0.5CH3OH. This compound exhibited magnetic ordering with a Curie temperature of 28 K due to ferromagnetic coupling between magnetic spins on NiII (S=1) and MoIII (S=1⁄2).

Key indicators: single-crystal X-ray study; T = 90 K; mean (N-C) = 0.006 Å; H-atom completeness 46%; disorder in main residue; R factor = 0.054; wR factor = 0.153; data-to-parameter ratio = 16.3. anion has a seven-coordinated capped-trigonal-prismatic coordination geometry. The site-occupancy factors of the disordered water molecules were set at 0.90, 0.60 and 0.50. The H-atom positions could not be determined for two of the water molecules. The H atoms of the water with a siteoccupancy factor of 0.90 were refined using O-H and HÁ Á ÁH distance restraints. Related literature