Development of the β-BaB2O4 crystal growth technique in the heat field of three-fold axis symmetry

Fluoride Borates with [(BO3)F]4– ↔ [F4]4– Anionic Isomorphism and X-ray Sensitivity

“…They are quite well known for their nonlinear optical properties and transparency in the UV range of the electromagnetic spectrum. Most widely used non-linear optical borates are the low temperature modification of barium borate β-BaB 2 O 4 [1][2][3][4], lithium triborate LiB 3 O 5 [5][6][7][8] and lithium-cesium borate CsLiB 6 O 10 [9][10][11]. Fluoride borates stand out amongst other borates, as they possess much broader area of transparency with the cutoff edge shifted further in the UV-range [12,13,16].…”

“…Cation Sr 2+ stabilizes the electron-hole pairs in the crystal lattice at room temperature and leads to the formation of [BO3 O x2 ] 4-groups in Ba 4-x Sr 3+x (BO 3 ) 4-y F 2+3y phase, which are absent in Ba 7 (BO 3 ) 4-x F 2+3x one. We believe that the opportunity to vary composition within the same crystal structure becomes a prospective tool to vary physical and chemical properties of the Ba 4-x Sr 3+x (BO 3 ) 4-y F 2+3y phosphor, in particular, the value of K-edge, which is 37.4 keV for Ba2+ and 16.1 keV for Sr 2+ .…”

Phase formation in the BaB2O4-BaF2 system

“…In the case of the complete pyrohydrolysis of BaF 2 , there may be a transition from the initial composition (54. 5 [11]. The eutectic temperature of the Ba 3 B 2 O 6 -BaB 2 O 4 system is 905 ± 7°C.…”

Comparative Interrelationship of the Structural, Nonlinear-Optical and Other Acentric Properties for Oxide, Borate and Carbonate Crystals

“…Then the NLO properties were predicted by Ch. Chen and others [14,15], and the crystal growth technology was developed in many studies [117][118][119]. Earlier, and for the last years, some deep UV borate and fluoride-borate crystals have been grown [120][121][122][123][124][125][126].…”