Zirconium-Free Sodium Ion Conducting NASICON-type Structure NaMAl(PO4)3 (M = Nb, Ta)

This dataset contains the raw and processed experimental and computational data supporting the manuscript entitled “Zirconium-Free Sodium Ion Conducting NASICON-type Structure NaMAl(PO₄)₃ (M = Nb, Ta)”. The data include powder X-ray diffraction (PXRD), scanning electron microscopy and energy-dispersive X-ray spectroscopy (SEM/EDS), Raman spectroscopy, solid-state NMR spectroscopy, density functional theory (DFT) calculations, solid-state impedance spectroscopy, Arrhenius conductivity analysis, sodium-reactivity measurements, and X-ray photoelectron spectroscopy (XPS) of sodium-treated samples. The dataset also contains equivalent-circuit fitting results, processed figures, supporting information, and associated analyses used in the manuscript. The files include raw experimental data, processed datasets, electrochemical and conductivity data, spectroscopic data, microscopy and elemental mapping data, computational data, XPS data, figures, supporting analyses, and presentation or source files. File formats include .xlsx, .csv, .txt, .pdf, .png, .jpg, .docx, .pptx, .opju, and other instrument- or software-generated data files where applicable. Software used to access or analyse the data includes Microsoft Excel, OriginPro, Microsoft PowerPoint, CasaXPS, MestReNova (Mnova), CASTEP and associated DFT analysis software, together with standard image-viewing software.