High-Pressure Synthesis of β-IrB and Determination of the Compressibility of Various Iridium Borides.

A new iridium boride, β-IrB, was synthesized under high-pressure/high-temperature conditions of 10.5 GPa and 1500 °C in a multianvil press with a Walker-type module. The new modification β-IrB crystallizes in a new structure type in the orthorhombic space group Pnma (no.