https://hpmpc.org/bbs/board.php?bo_table=m04_01&wr_id=19&page=21
"Structural studies of hydrated germanium X-type zeolite via Rietveld analysis of synchrotron...
An aluminogermanate analog of zeolite X has been synthesized by solution reaction, and characterized by Rietveld analysis of synchrotron powder X-ray...
x typerietveld analysisstructuralstudieshydrated