Contaminated water, especially with heavy metals, is a global environmental threat. Metallosilicates, like titanosilicate cation exchangers, show promise in selectively removing metal ions. However, analyzing their ion exchange selectivity requires advanced techniques. Flux crystal growth (FCG) offers a novel solution by enabling the production of high-quality single crystals, essential for in-depth studies. Using flux melts, allows controlled crystallization at lower temperatures, reducing defects and enhancing crystal quality. Additionally, growing single crystals through FCG facilitates precise characterization using single crystal X-ray diffraction, providing insights into cation-framework bonding interactions. This knowledge aids in designing targeted metallosilicates for efficient ion exchange capabilities.