Local structure and equation of state of elemental Nb under pressure probed by EXAFS

Pressure induced local structural changes in the elemental Nb will be studied using EXAFS up to 80 GPa. Evolution of the nearest neighbor bond distance and thus the unit cell volume can be derived with high accuracy from EXAFS refienemnts. In addition, mean square relative displacement also can extracted for various pressure points, allowing to estimate quantitative such as Grüneisen parameter.