90‐kilobar diamond‐anvil high‐pressure cell for use on an automatic diffractometer

A gasketed diamond‐anvil high‐pressure cell is described which can be used on a four‐circle automatic diffractometer to collect x‐ray intensity data from single‐crystal samples subjected to truly hydrostatic pressures of over 90 kilobars. The force generating system exerts only forces normal to the diamond faces to obtain maximum reliability. A unique design allows exceptionally large open areas for maximum x‐ray access and is particularly well suited for highly absorbing materials, as the x rays are not transmitted through the sample. Studies on ruby show that high‐pressure crystal structure determinations may be done rapidly, reliably, and routinely with this system.