US 12,276,039 B2
Crystal of europium compound and method for producing crystal of europium compound
Sunao Chatani, Wakayama (JP); Masahiko Inui, Wakayama (JP); Motohiro Tagaya, Nagaoka (JP); Takuya Kataoka, Nagaoka (JP); and Satoshi Motozuka, Kitakyusyu (JP)
Assigned to OHARA INC., Sagamihara (JP); NATIONAL UNIVERSITY CORPORATION NAGAOKA UNIVERSITY OF TECHNOLOGY, Nagaoka (JP); and NATIONAL INSTITUTE OF TECHNOLOGY, Tokyo (JP)
Appl. No. 17/911,537
Filed by OHARA INC., Sagamihara (JP); NATIONAL UNIVERSITY CORPORATION NAGAOKA UNIVERSITY OF TECHNOLOGY, Nagaoka (JP); and NATIONAL INSTITUTE OF TECHNOLOGY, Hachioji (JP)
PCT Filed Mar. 16, 2021, PCT No. PCT/JP2021/010644
§ 371(c)(1), (2) Date Sep. 14, 2022,
PCT Pub. No. WO2021/187491, PCT Pub. Date Sep. 23, 2021.
Claims priority of application No. 2020-046604 (JP), filed on Mar. 17, 2020.
Prior Publication US 2023/0175165 A1, Jun. 8, 2023
Int. Cl. C30B 1/10 (2006.01); C30B 29/12 (2006.01)
CPC C30B 1/10 (2013.01) [C30B 29/12 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A crystal of a europium compound containing europium,
having a powder X-ray diffraction pattern having a first diffraction peak in a diffraction angle (2θ) range of 34.3° to 36.1° in which a half value width of the first diffraction peak is 1.1° or less, and/or having a second diffraction peak in a diffraction angle (2θ) range of 28.6° to 29.6° and a third diffraction peak in a diffraction angle (2θ) range of 36.8° to 38.4° in which a half value width of the second diffraction peak is 0.6° or less and a half value width of the third diffraction peak is 1.0° or less, and
is at least one compound represented by the following chemical formulae (1) to (4):
EuClx  (1)
Eu(OH)2  (2)
Eu(OH)2Cl  (3)
EuOCl  (4)
wherein in the formula (1), x is 0.05 or more and 5 or less.