Table 1 Ambient volume V0, bulk modulus B0, first derivative of bulk modulus B0′, maximum pressure reached, Pmax, pressure transmitting medium (PTM) and calibrants.

From: Phase stability and electronic structure of iridium metal at the megabar range

V0 (A3) B0 (GPa) B0 Pmax (GPa) PTM Calibrant  
56.48 339 (3) 5.3 (1) 137 He Cu This work
56.58 383 (14) 3.1 (8) 60 Ar Ruby ref.1
56.58 366 5.0 Ab initio up to 900 GPa ref.9
56.69 (17) 306 (23) 6.8 65 MgO MgO ref.7