我国杰出的结晶学家和矿物学家彭志忠教授离开了我们,永远地离开了我们。我失去了一位亲密的良师益友。三月三日早晨,鄂莫岚老师告诉我:“彭志忠病重,癌症晚期,恐怕不行了”。我感到十分突然。一月廿四日,参加他的研究生论文答辩会后,我还曾在他家吃饭呢!当时他虽颇有倦意,却也看不出有多大毛病来。作为学生,我恳请他停止工作,休息一、两年,使身体彻 Professor Peng Zhizhong, an outstanding crystallographer and mineralogist in our country, left us and left us forever. I lost an intimate mentor. On the morning of March 3, Mr. Mo Lan taught me: “Peng Zhizhong is ill and late in cancer. I am afraid to die.” I feel very sudden. After I attended his postgraduate thesis defense on January 24, I also had dinner at his house. Although he was very tired at that time, he did not see any serious problems. As a student, I urge him to stop working and take a break for one or two years to make the body thoroughly