Journal Article Research Support, Non-U.S. Gov't E1UOL152H7 Iron beamline imaging 42Z2K6ZL8P 7440-44-0 7440-57-5 Arsenites Carbon Comparative Study Evaluation Study Friedreich's ataxia Gold KB mirrors Manganese N5509X556J Polymers Research Support, U.S. Gov't, Non-P.H.S. X-ray ptychography anisotropic Poisson's ratio anisotropic elasticity of silicon arsenite bent mirror chromosome coherence coherent X-ray diffraction cryogenic cooled monochromator crystal orientation