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Updated: Jun 24, 2025
Author Spotlight: A Rapid, Microwave-Assisted Hydrothermal Synthesis Of Nickel Hydroxide Nanosheets
Published on: August 18, 2023
High-resolution crystal structure of the double nitrate hydrate [La(NO3)6]2[Ni(H2O)6]3·6H2O
David Wenhua Bi1, Yong Liu1, Arnaud Magrez1
1Crystal Growth Facility, Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL), Switzerland.
Abstract:
This study introduces bis-[hexa-kis-(nitrato-κ2 O,O')lanthanum(III)] tris-[hexa-aqua-nickel(II)] hexa-hydrate, [La(NO3)6]2[Ni(H2O)6]3·6H2O, with a structure refined in the hexa-gonal space group R . The salt com-prises [La(NO3)6]3- icosa-hedra and [Ni(H2O)6]2+ octa-hedra, thus forming an intricate network of inter-penetrating honeycomb lattices arranged in layers. This arrangement is stabilized through strong hydrogen bonds. Two successive layers are connected via the second [Ni(H2O)6]2+ octa-hedra, forming sheets which are stacked perpendicular to the c axis and held in the crystal by van der Waals forces. The synthesis of [La(NO3)6]2[Ni(H2O)6]3·6H2O involves dissolving lanthanum(III) and nickel(II) oxides in nitric acid, followed by slow evaporation, yielding green hexa-gonal plate-like crystals.
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