Rb2O

Notas

Rubidium oxide (Rb2O) functions as a rare alkali oxide component in ceramic systems. Due to its extreme chemical reactivity with water, it does not exist as an independent raw material for glaze formulation. In nature, rubidium is found primarily as a trace substitution within the crystal lattice of silicate and aluminosilicate minerals, most notably lepidolite, where it frequently replaces potassium. Consequently, when rubidium is present in ceramic raw materials, its impact on glass formation, fluxing behavior, and thermal expansion is analogous to that of potassium oxide (K2O), though it is rarely isolated or utilized specifically for its distinct chemical properties in glaze calculation. In analytical reports for ceramic minerals, rubidium content is standardly expressed as an equivalent concentration of Rb2O.