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Updated: Apr 18, 2026

Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV
Published on: December 29, 2016
Synthesis of the NaGa(S1-xSex)2 solid solution from mechanically activated precursors
Louisiane Verger1, Julien Trébosc2, Santhoshkumar Sundaramoorthy3
1Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France. louisiane.verger@univ-rennes.fr.
Abstract:
NaGaS2 and NaGaSe2 are two recently discovered compounds that crystallize in the same structure type. In this work, NaGa(S1-xSex)2 (x = 0.5, 0.75 and 1) are prepared using an alternative synthesis route, mechanochemistry followed by heat treatment. Na2S, Na2Se, Ga2S3 and Ga2Se3 are milled in stoichiometric proportions. Differential scanning calorimetry, X-ray diffraction and solid-state nuclear magnetic resonance (23Na and 71Ga) show that the compounds after milling are composed of crystalline NaGa(S1-xSex)2 with an amorphous part. Annealing promotes the formation of crystalline NaGa(S1-xSex)2. A linear variation in the lattice parameters is observed, indicating that a solid solution is formed and that Se substitutes for S.
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