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Abstract The solvothermal reaction of FeCl 2 ⋅ 4H 2 O and H 4 TBC4 in a basic dmf/EtOH solution affords an Fe III 18 Keplerate conforming to a stellated cuboctahedron. Magnetic and heat capacity measurements reveal spin frustration effects arising from the high symmetry. A crossover between inverse and direct magnetocaloric effects is observed at ~10 K for applied‐field changes lower than 3 T.
Wilson et al. (Mon,) studied this question.
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