Dear colleagues:
I should send a sad news that Prof. Chuantian CHEN of Technical Institute of Physics and Chemistry, CAS was passed away yesterday October 31th morning at 10:57 who won the Laudise prize on 2013. He had invented LBO,KBBF UV and DUV nonlinear optical crystals and proposed the anion group model for the exploration of new nonlinear optical crystals. His passed away is a great loss for Chinese Crystal Society as well as for the world!
（很遗憾向大家宣布一个令人悲伤的消息，曾获得过2013年Laudise奖的中国科学院理化技术研究所陈创天教授于2018年10月31日上午9时57分逝世。陈创天教授发现了KBBF,LBO紫外和深紫外非线性光学晶体，并提出“阴离子基团理论”用于指导新型非线性光学材料的探索。他的辞世是中国乃至全世界晶体界的巨大损失。）
Our Japanese society of crystal growth should send our sincere hert to Chinise community of crystal growth and his family. The passed away of Prof. Chen is a great loss not only for chinese community but world one. Let me ask you to transfer our sincere sand mind to your community and his family.
（我们谨代表日本晶体生长学会向中国晶体生长协会及陈创天先生的家人表示诚挚的问候。陈教授的辞世是中国乃至世界非线性光学晶体材料研究领域的巨大损失。请代我们谨致沉痛哀悼，向中国晶体学界和陈先生的家人表示诚挚的慰问。）
——Prof. Koichi Kakimoto 国际晶体生长组织（IOCG）主席，九州大学应用力学研究所
Another big loss for our science. On behalf of the Spanish community of crystal growth, I joint you in offering my condolences to the family and relatives of Professor Chuangtian CHEN and to the whole community of crystal growth. He was great! Let's hope that young Chinese scientists will replace the contribution of China to our field.
（陈创天先生的辞世是科学界的巨大损失。在此，我谨代表西班牙晶体生长学会向陈先生的的逝世表示沉痛哀悼，并对他的家人及晶体生长界致以诚挚的慰问。陈创天先生是伟大的科学家，我们期待中国的青年科学家将他的贡献得以继承和发扬光大。）
——Prof. Juanma Garcia-Ruiz 国际晶体生长组织（IOCG）执行委员会成员，西班牙格拉纳达大学高等科学研究理事会安达卢西亚地球科学研究所晶体学研究实验室
Prof Chen loss is difficult for all the crystal growth community around the world.....
Please forward my condolences to the Chinese Crystal Growth community and prof Chen's wife...
Please consider publishing the obituary of prof Chen for IOCG website.
（陈创天教授的辞世，使国际晶体生长界不胜哀恸。请转达我们对中国晶体生长界和陈夫人的诚挚慰问。）
Dear All,
We join the colleagues and prof Chen.s Family in mourning. His achievements and ideas for NLO materials will stay with us forever!
It is a big loss, he WAS a giant......
（我们和同事及陈教授家人共同缅怀惦念陈教授的逝世。我们会时刻铭记他在NLO材料方面的理论和成就！他是一个伟人，他的逝世是学术界的巨大损失。）
——Prof. Dabkowska, Hanna国际晶体学联合会副主席，国际晶体生长组织执行委员会秘书，加拿大汉密尔顿麦克马斯特大学布鲁克豪斯材料研究所研究员
It is sad that another crystal grower from the older generation has passed away. I remember very well the presentation of the Laudise prize to Prof. Chen and the amazing results he and his group achieved on non-linear optical crystals.
Please pass my condolences, also on behalf of the Dutch crystal growers, to his family, friends and colleagues.
（又一位晶体生长界的前辈逝世，我们深感悲痛。我非常清楚地记得陈教授被授予Laudise奖的那一刻以及陈教授及其团队在NLO晶体方面取得的惊人成就。我谨代表荷兰晶体生长研究者向陈先生的家人，朋友和同事致以诚挚的慰问。）
——Prof. Dr. Elias Vlieg 国际晶体生长组织（IOCG）副主席，拉德堡德大学分子与材料研究所（IMM），固态化学与应用材料科学系主任
Another big loss in our community. I ask Prof. Jiyang Wang to convey my sympathy to family and colleagues of Prof. Chuantian Chen. I will remember him every time I open the book on NLO materials that he donated me few years ago.
（陈创天先生的逝世是我们领域的一大损失。昔日赠书犹在，睹物思人，常在吾心不能忘！特请王继扬教授代我向陈教授的家人和同事转达我诚挚的慰问。）
——Prof. Roberto Fornari 国际晶体生长组织（IOCG）前任主席，帕尔马大学数学、物理与自然科学系物理学教授
I am so sad to hear that Prof. Chen left us on Oct. 31
People in the world will not forget the name of a great scientist who invented many useful nonlinear crystals.
It was a great shock when Prof. Chen presented a talk on BBO at CLEO in 1980’s,and people did not believe at once.
Fortunately, I had a chance to see him 1n 1999, and since then started the collaboration on a new crystal KBBF.
This collaboration is a great honor to me.
We verified many splendid properties of KBBF, and explored the new frontier in the VUV region..
In the field of photoelectron spectroscopy, a evolutional change occurred by the light source with KBBF.
I remember vividly the modest smile of Prof. Chen. I send my sincere wishes to his family.
——Prof. Shuntaro Watanabe, Emeritus Professor of University of Tokyo