Rb5Ba2(B10O17)2(BO2): The formation of unusual functional [BO2]− in borates with deep-ultraviolet transmission window

Ba10LuB18O32F13: the first example of borate in the Lu–B–O–F system with the unprecedented FBB [B9O22]

“…Borates have been applied in many areas, including nonlinear optics (NLO), catalysis, and photonic technology. 1–14 In the realm of NLO, researchers have an urgent desire to discover materials that can break through the ultraviolet boundary and reach the DUV region. To date, in addition to the most commonly used NLO crystals, such as KBe 2 BO 3 F 2 15 (KBBF), etc ., a series of borates containing [BOxF 4− x ] units with excellent optical properties has been reported.…”

Two layered galloborates from centric to acentric structures: syntheses and NLO properties

“…Boron can be coordinated with two, three or four O/F atoms to form BO 2 lines, BO 3 triangles and BO 4Àx F x (x = 0, 1, 2, and 3) tetrahedra. [8][9][10] These basic units polymerize through edge-/ corner-sharing to form various oxoboron clusters, commonly ranging from {B 3 } to {B 20 }. [11][12][13][14][15] Oxoboron clusters with more than 20 B atoms are extremely rare, including the newly observed B 22 O 42 and the largest B 69 O 108 (OH) 18 .…”

BaI3O9H: a new alkaline-earth metal hydroxy iodate with two groups

“…After the test, the collected diffuse reflectance spectrum was converted into absorbance using the Kubellka–Munk remission function: F ( R ) = (1 − R ) 2 /(2 R ) = K / S ( R is reflectance, K is absorption coefficient, S is scattering coefficient), 43,44 and the corresponding experimental band gap value could be estimated in the absorption spectrum by the curve leading part extrapolation method. 45–53…”

“…After the test, the collected diffuse reflectance spectrum was converted into absorbance using the Kubellka-Munk remission function: 43,44 and the corresponding experimental band gap value could be estimated in the absorption spectrum by the curve leading part extrapolation method. [45][46][47][48][49][50][51][52][53]…”