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The rare earth–transition metal ternary nitride La 3 Cr 2 N 6 was synthesized from the elements and an excess of sodium and gallium at 900 ∘ C in a sealed niobium tube. This compound crystallizes in the tetragonal space group I4/mmm (No. 139) with a=3.8525(5)Å and c=20.508(4)Å. It is isostructural with the recently discovered ternary nitrides R 3 M 2 ...
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