Acknowledgment
We thank the financial support from the Nuclear Energy University Program managed by the Office of Nuclear Energy at U.S. Department of Energy (award number DE-NE0008797), the Grants-in-Aid program (John H. and Colleen Silcox Named Grant in 2021) of American Association of Petroleum Geologists, and Japan Atomic Energy Agency. The X-ray scattering data were collected at the X-ray Science Division beamline of 9-ID, a resource of the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. All laboratory-derived data presented in this work will be placed into a repository managed by Mavs Dataverse of the University of Texas at Arlington.