Disclosed are novel crystal of the fluoran compound represented by the formula ( I )
,characterized by a specific X-ray diffraction diagram; preparation process thereof; and recording materials comprising the crystal.
所公开的是由式 ( I ) 所代表的
芴化合物的新型晶体
其特征为特定的 X 射线衍射图;其制备过程;以及包含该晶体的记录材料。