High-Pressure Synthesis of Two Pb3(C3N6) Polymorphs Featuring Fully Deprotonated [C3N6]6– Melaminate Anions - Umbertoluca Ranieri; Akun Liang; Charles Lamb; James Spender; Sarah Bolton; Andrey Aslandukov; Bernhard Massani; Ferenc Tasnádi; Pierre-Olivier Autran; James A. D. Ball; Angelika D. Rosa; Bihan Wang; et al. (Journal of the American Chemical Society, 2025)