Here we report the first examples of 3d-4f compounds based on LnII cations. We have obtained a series of Ni2[LnCl6] isostructural compounds where LnII = Ce 1, Eu 2 and Gd 3 which were characterized in a cubic crystalline system with a Fm3[combining macron]m space group. Magnetic and optical characterization was also performed on this new class of compounds.

Retraction of ‘Ni2[LnCl6] (Ln = EuII, CeII, GdII): the first LnII compounds stabilized in a pure inorganic lattice’ by Bianca Baldo et al., Chem. Commun., 2018, 54, 7531–7534.

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