Effective Method for the Determination of the Unit Cell Parameters of New MXenes.

MXenes are of great practical interest. While the physical properties of such a well-known MAX phase as TiAlC and the TiC MXene that is based on it have been widely studied, it is extremely important to study the properties of new four-component MAX-phases and the MXenes based on them. To do this, first, it is necessary to characterize the obtained materials. In this work, the TiNbC MXene was characterized. Since the material is fairly new, there are no crystallographic data for such systems in the international databases. We proposed a method for the determination of the main unit cell parameters of the new TiNbC MXene, which was based on a combination of the DFT method, TEM studies, and an X-ray diffraction analysis.