According to the crystal-chemical formula of andersonite, i. e., Na2Ca[UO2 (C03)3]6H20, the synthesis of andersonite was completed under the condition of oom temperature and one atmosphere by using uranyl nitrate, anhydrous sodi- um carbonate and calcium nitrate. Later, the same mineral was also synthesi- zed at 37℃，60℃, 80℃ and 92℃ . Besides, experiments on pH stable range for the formation of andersonite at room temperature and under one atmosphere were performed. It has been observed that the pH values for the stableness of the parent solutions range from 7.22 to 9.30, and the pH values for the for- mation of andersonite range from 8.00 to 9.30. During crystallization the pH values of original solutions vary within a narrow range(8.00-8.25) .Such pheno- mena of andersonite as their fluorescence spectra and variation in fluorescence intensity were studied at room and lower temperatures.