Ba₂Zn₂B₆O₁₃: coplanar [B₂O₅] in unnoted U-shaped [B₆O₁₃] groups achieving large birefringence

Abstract

Currently, π-conjugated [B2O5] moieties are rarely studied for designing deep-UV birefringent crystals. Here, we report a new deep-UV birefringent crystal Ba2Zn2B6O13 with a deep-UV cut-off edge of 189 nm and...

An effective pathway to design and synthesize UV birefringent crystalsviarational assembly of π-conjugated [CO3]2−and [NO3]−triangles

“…Previous studies mainly focused on borate UV birefringent crystals, [9][10][11][12] such as SrAlB 3 O 6 F 2 (0.078 at 1064 nm, 7.65 eV), 13 Li 3 La 2 (BO 3 ) 3 (0.078 at 1064 nm, 5.22 eV), 14 Ca(BO 2 ) 2 (0.247 at 193 nm, 7.34 eV), 15 Ba 2 Zn 2 B 6 O 13 (0.085 at 532 nm, 6.12 eV), 16 and NaMgBe 2 (BO 3 ) 2 F (0.078 at 589 nm, 4.19 eV), 17 which is mainly attributed to the excellent properties of the planar triangle [BO 3 ] 3À group, including the relatively strong anisotropic polarizability and high UV transmittance. [18][19][20][21] It is well known that the [CO 3 ] 2À and [NO 3 ] À groups possess similar pconjugated electronic configurations and planar triangle structures to the [BO 3 ] 3À group.…”