@article{oliveira_ludwig_cuin_d’oliveira_santos_anjos_pacheco_araújo_ludwig_2026,  title={Structural, Thermal, and Vibrational Effects of Low Level Rb<sup>+</sup> Incorporated in (K<sub>1-x</sub>Rb<sub>x</sub>)<sub>2</sub>Ni(SO<sub>4</sub>)<sub>2</sub>·6H<sub>2</sub>O Mixed Crystals},  volume={37},  ISSN={0103-5053},  url={https://doi.org/10.21577/0103-5053.20260126},  DOI={10.21577/0103-5053.20260126},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Oliveira, Victor H. and Ludwig, Valdemir and Cuin, Alexandre and D’Oliveira, Kaique A. and Santos, Ilza T. C. and Anjos, Virgílio C. and Pacheco, Tiago S. and Araújo, José H. de and Ludwig, Zélia M. C.},  year={2026},  pages={e–20260126} }