YBeHg2

YBeHg2 is an intermetallic ceramic compound containing yttrium, beryllium, and mercury elements. This is a research-phase material studied primarily in solid-state chemistry and materials science contexts rather than established commercial production. The material's combination of lightweight beryllium with dense mercury and rare-earth yttrium makes it notable for theoretical investigations into unusual phase diagrams and crystal structures, though practical engineering applications remain limited due to toxicity concerns associated with mercury and the specialized synthesis requirements of this ternary system.