Journal Article X-ray optics X-ray imaging dark-field X-ray microscopy X-ray microscopy compound refractive lens high-heat-load optics thermal deformation wavefront propagation 3DXRD Calcium Carbonate H0G9379FGK Minerals Research Support, Non-U.S. Gov't X-ray diffraction X-ray monochromator anisotropic Poisson's ratio anisotropic elasticity of silicon bent mirror biomineralization calcite characterization coalescence coherence cryogenic cooled monochromator cryogenic cooling crystal growth crystal orientation data analysis diffraction imaging