A New Lanthanum and Calcium Borate La₂CaB₁₀O₁₉

Abstract

A new lanthanum calcium borate with the composition La2CaB10O19 has been synthesized. Single crystals have been grown from a melt close to the stoichiometric composition. The compound crystallizes in the monoclinic system, space group C2, with a = 11.043(3) Å, b = 6.563(2) Å, c = 9.129(2) Å, α = γ = 90°, β = 91.47°, and two formula units per cell. The crystal structure contains B5O12 double-ring pentaborate groups, which are linked together to form an infinite two-dimensional double layer. The layer runs almost perpendicular to the c axis of the crystal. The La atoms are located in layers, while the Ca atoms are located between two layers. La2CaB10O19 exhibits an optical second-harmonic generation effect about twice as large as that of KDP (KH2PO4).

Crystallization and sinterability of glass-ceramics in the system La2O3–SrO–B2O3

“…Moreover La 2 SrB 10 O 19 is isostructural with La 2 CaB 10 O 19 [33]. The observed and calculated XRD data for the synthesized compound that is the subject of this paper are given in Table 4, and the unit-cell parameters in comparison to the literature data are given in Table 5.…”

The glass transition and crystallization kinetic studies on BaNaB9O15glasses

“…Borate-based non-linear optical crystals, which include Li 2 B 4 O 7 [11], La 2 CaB 10 O 19 [12] and CsLiB 6 O 10 [13] etc., were used to obtain UV light.…”

Growth of La2CaB10O19 single crystals by top-seeded solution growth technique

“…La 2 CaB 10 O 19 (LCB) crystal is a new nonlinear optical (NLO) crystal discovered by Wu's group [1]. The crystal belongs to the monoclinic system, space group C 2 , with lattice parameters of a ¼ 11.043(3) Å , b ¼ 6.563(2) Å , c ¼ 9.129(2) Å , and b ¼ 91.471.…”