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| Home > Publications database > Synthesis of $(V_{0.2}C_{0.8})_2(Ga_{0.5}Ge_{0.5})(C_{0.6}N_{0.4})$, a Triple-Site Solid Solution MAX Phase |
| Home > Publications database > Synthesis of $(V_{0.2}C_{0.8})_2(Ga_{0.5}Ge_{0.5})(C_{0.6}N_{0.4})$, a Triple-Site Solid Solution MAX Phase |
| Journal Article | PUBDB-2026-02143 |
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2026
American Chemical Society
Washington, DC
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Please use a persistent id in citations: doi:10.1021/acs.inorgchem.5c05814
Abstract: MAX phases are an extremely versatile family of layered compounds that usually consist of an early to-mid transition metal ($M$-element), a main group element (mainly groups 13–15) or late transition metal ($A$-element) and carbon and/or nitrogen ($X$-element). It is therefore not too surprising that in addition to the roughly 70 compounds with 211 stoichiometry, there exist many solid solutions with mixed elements on the $M$- and $A$-site, respectively. Much less common are solid solution phases with mixed elements on both $M$- and $A$-site simultaneously (double-site solid solutions), as well as solid solutions on the $X$-site (carbonitride MAX phases). Challenging these restrictions in the chemical composition space, we present here for the first time $(V_{0.2}C_{0.8})_2(Ga_{0.5}Ge_{0.5})(C_{0.6}N_{0.4})$ as a new carbonitride member of the MAX phase family, containing solid solutions on all three lattice sites simultaneously. This triple-site solid solution MAX phase is synthesized by high-temperature solid-state methods, and we demonstrate that it is possible to use two different nitrogen-containing precursors (VN and Cr$_2$N), respectively. Structure, morphology and chemical composition are characterized by X-ray powder diffraction (XRD), electron microscopy (SEM/TEM), secondary ion mass spectrometry (SIMS), and X-ray photoelectron spectroscopy (HAXPES).
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