公开(公告)号：US20230175165A1

公开(公告)日：2023-06-08

申请号：US17911537

申请日：2021-03-16

申请人： OHARA INC. ,  NATIONAL UNIVERSITY CORPORATION NAGAOKA UNIVERSITY OF TECHNOLOGY ,  NATIONAL INSTITUTE OF TECHNOLOGY

发明人： Sunao CHATANI ,  Masahiko INUI ,  Motohiro TAGAYA ,  Takuya Kataoka ,  Satoshi MOTOZUKA

IPC分类号： C30B1/10 ,  C30B29/12

CPC分类号： C30B1/10 ,  C30B29/12

摘要： The present invention provides a crystal of a europium compound containing europium. The present invention enables the preparation of a crystal of a europium compound having a powder X-ray diffraction pattern having a first diffraction peak in diffraction angle (2θ) range of 34.3° to 36.1° in which a half width of the first diffraction peak is 1.8° or less, and/or having a second diffraction peak in diffraction angle (2θ) range of 28.6° to 29.6° and a third diffraction peak in diffraction angle (2θ) range of 36.8° to 38.4° in which a half width of the second diffraction peak is 1.0° or less and a half width of the third diffraction peak is 1.6° or less, and



being at least one compound selected from compounds represented by formulae (1) to (4):






EuClx  (1)



Eu(OH)2  (2)



Eu(OH)2Cl  (3)



EuOCl  (4)



x is 0.05 or more and 5 or less.