As a critical component of polarization devices and optical devices,birefringent crystals are widely used in high-tech fields such as laser communication,laser polarization engineering,and high-precision scientific re...As a critical component of polarization devices and optical devices,birefringent crystals are widely used in high-tech fields such as laser communication,laser polarization engineering,and high-precision scientific research instruments.In this study,two new hydroxyl borates,KB_(7)O_(9)(OH)_(4)and KB_(7)O_(10)(OH)_(2),were synthesized successfully via the hydrothermal method.The two hepta-borates feature different fundamental building units:[B_(7)O_(10)(OH)_(4)]in KB_(7)O_(9)(OH)_(4)and[B_(7)O_(12)(OH)_(2)]in KB_(7)O_(10)(OH)_(2).These units polymerize through oxygen atoms to form a one-dimensional(1D)infinite[B_(7)O_(10)(OH)_(4)]chain and a two-dimensional(2D)[B_(7)O_(12)(OH)_(2)]layer,respectively,demonstrating a hydroxyl-induced structural reconstruction.Notably,the 1D[B_(7)O_(9)(OH)_(4)]_(∞)infinite chain in KB_(7)O_(9)(OH)_(4)represents the first such structure identified in inorganic hydrated hepta-borates,as confirmed by the ICSD database.Performance characterization reveals that both compounds exhibit deep-UV transparency(with cut-off wavelengths shorter than 200 nm)and moderate birefringence values ranging from 0.041 to 0.078 at 546 nm,highlighting their potential as deep-UV birefringent crystal candidates.展开更多
基金supported by the National Natural Science Foundation of China(22361132544,22193044,and 22335007)the Tianshan Basic Research Talents Program(2022TSYCJU0001)+2 种基金the CAS Project for Young Scientists in Basic Research(YSBR-024)the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB0880000)the Xinjiang Tianchi Talents Program.ARO’s work was supported by the Russian Science Foundation(grant 24-43-00162).
文摘As a critical component of polarization devices and optical devices,birefringent crystals are widely used in high-tech fields such as laser communication,laser polarization engineering,and high-precision scientific research instruments.In this study,two new hydroxyl borates,KB_(7)O_(9)(OH)_(4)and KB_(7)O_(10)(OH)_(2),were synthesized successfully via the hydrothermal method.The two hepta-borates feature different fundamental building units:[B_(7)O_(10)(OH)_(4)]in KB_(7)O_(9)(OH)_(4)and[B_(7)O_(12)(OH)_(2)]in KB_(7)O_(10)(OH)_(2).These units polymerize through oxygen atoms to form a one-dimensional(1D)infinite[B_(7)O_(10)(OH)_(4)]chain and a two-dimensional(2D)[B_(7)O_(12)(OH)_(2)]layer,respectively,demonstrating a hydroxyl-induced structural reconstruction.Notably,the 1D[B_(7)O_(9)(OH)_(4)]_(∞)infinite chain in KB_(7)O_(9)(OH)_(4)represents the first such structure identified in inorganic hydrated hepta-borates,as confirmed by the ICSD database.Performance characterization reveals that both compounds exhibit deep-UV transparency(with cut-off wavelengths shorter than 200 nm)and moderate birefringence values ranging from 0.041 to 0.078 at 546 nm,highlighting their potential as deep-UV birefringent crystal candidates.
