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Reverse Microemulsion-mediated Synthesis of Monometallic and Bimetallic Early Transition Metal Carbide and Nitride Nanoparticles

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Li80Ba39N9: the first Li/Ba subnitride.

Volodymyr Smetana¹, Volodymyr Babizhetskyy, Grigori V Vajenine

¹Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany.

Inorganic Chemistry

|December 19, 2006

Summary

Researchers investigated the crystal structure of Li80Ba39N9, a novel alkali-alkaline-earth metal subnitride. This new compound features unique subnitride and polytetrahedral lithium clusters within its tetragonal unit cell.

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Published on: November 12, 2016

Area of Science:

Solid-state chemistry
Inorganic materials science
Crystallography

Background:

Alkali-alkaline-earth metal subnitrides are an emerging class of compounds with complex structures.
Understanding their structural motifs is key to exploring their properties and potential applications.

Purpose of the Study:

To determine the crystal structure of the newly synthesized compound Li80Ba39N9.
To characterize the bonding and structural features of this novel subnitride.

Main Methods:

Single-crystal X-ray diffraction was employed to analyze the crystal structure.
The synthesis involved reacting alkali metals, alkaline-earth metals, and barium azide.

Main Results:

Li80Ba39N9 exhibits a novel crystal structure with tetragonal symmetry (space group I(-)42m).
The structure is characterized by distinct subnitride clusters (Li12Ba5N6) and polytetrahedral lithium clusters (Li13 icosahedra).
Both ionic and metallic bonding contribute to the overall structure.

Conclusions:

Li80Ba39N9 represents a new structural type within alkali-alkaline-earth metal subnitrides.
The presence of complex lithium clusters highlights similarities with known lithium-rich intermetallic compounds.
The findings provide insights into the structural diversity and bonding in complex metal-nitrogen systems.