INORGANIC IONIC MOLECULAR CRYSTAL

摘要

An inorganic ionic molecular crystal that can be used as an ultraviolet absorber, a vitamin C supplement or a detection element material for ESR radiation dose meter. 40 ml of 1 M aqueous calcium chloride solution is added to 400 ml of 0.1 M aqueous sodium carbonate solution containing ascorbic acid to thereby precipitate calcium carbonate crystals. The thus obtained calcium carbonate in its crystal contains ascorbic acid. By virtue of the activity of the ascorbic acid, this calcium carbonate exhibits ultraviolet absorption in the UVB region as shown in Fig. 1 and can find application in ESR radiation dose meter and vitamin C supplements.