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In situ XRD patterns corresponding to the recovery of RhH2 to ambient pressure at low temperature and its decomposition with temperature increased at 1 atm. (A) Decompression at 6.1 K; (B) warming up at ambient pressure; X-ray wavelength, 0.39804 Å. The diffraction peaks at 11°–12° marked with asterisks are from the gasket.
