The reporter learned from the Institute of Physics of the Chinese Academy of Sciences on the 23rd that the Chinese scientific research team found an unknown mineral crystal - ULM-1- rich in water molecules and ammonium in Chang'e-5 lunar samples. This is the first time that scientists have discovered molecular water in lunar soil. The relevant results were recently published online in the international academic journal Nature Astronomy. Is there water on the moon? This issue is crucial for the study of lunar evolution and resource development. The landing site of Chang'e-5 is located in the northeastern region of the Mare Imbrium on the near side of the Moon, which is considered one of the youngest basalt units on the surface of the Moon. This provides new opportunities for related research. The team's research found that ULM-1 contains up to 6 crystalline waters in its molecular formula, with a mass ratio of water molecules in the sample as high as 41%. From the infrared and Raman spectra of the crystal, characteristic vibrational peaks originating from water molecules and ammonium can be clearly observed. Unlike volatile water ice, ULM-1 is a highly stable hydrated mineral. The discovery of ULM-1 suggests that stable hydrated salts may exist on the moon even in vast areas of sunlight exposure. This provides new possibilities for the development and utilization of lunar resources in the future Chen Xiaolong, the corresponding author of the article and a researcher at the Institute of Physics of the Chinese Academy of Sciences, said. (New Society)