2:45 PM - 3:00 PM
[SMP33-15] Density measurements of crystalline Fe and amorphous materials at high pressure
Keywords:X-ray absorption method, diamond anvil cell
High pressure measurements were performed using a DAC with a gasket having 3 sample chambers. Fe or amorphous samples were loaded in a sample chamber for density measurements. Powders of KCl, KBr, or RbBr as references for thickness were also loaded in the other sample chambers. After XRD patterns were taken from all samples and references, absorption profiles were also measured. Experimental pressures were determined using pressure averages between KCl and KBr, or KBr and RbBr. Densities based on the X-ray absorption method were obtained using the Lambert Beer law with mass absorption coefficients from NIST data base. Densities of crystalline Fe were obtained up to 20 GPa and density differences between XRD and the absorption method were less than 2%. This technique was applied to densities of amorphous materials as well. We will report the densities based on the X-ray absorption method.