ChemInform Abstract: Synthesis and Properties of Binary Borates of Scandium and of Rare Earth Elements of the Cerium Subgroup.

Abstract

Aus den Metalloxiden und H3BO3 (5‐ 10proz. Überschuß) werden durch Glühen bei 750°C (2‐5 h), dann bei 1100°C (5‐ 15 h) die Titelverbindungen mit der allgemeinen Zusammensetzung MSC3(BO3)4 mit M: Ce, Pr, Nd, Sm dargestellt.

Crystallochemical Design of Huntite-Family Compounds

“…Crystal structures of single crystals were refined within the framework of the huntite structure (space group R32) for the LnAl 3 (BO 3 ) 4 (Ln = Nd, Sm, Eu, Gd, (Y), Tm, Yb), LnFe 3 (BO 3 ) 4 (Ln = La, Nd, Eu, Gd, Er), LnGa 3 (BO 3 ) 4 (Ln = Nd, Eu, Ho), LnSc 3 (BO 3 ) 4 (Ln = La, Ce, Pr, Nd, Sm, Eu) by the X-ray diffraction (XRD) analysis (Table 1). It should be noted that in some literature sources (in particular, in [27]) it was not indicated on which samples, single-crystal or polycrystalline, a structural analysis has been performed; in [15,36,37,80], any methodology of structural studies is absent, the method of investigation, X-ray diffraction, being indicated only. Neutron diffraction study performed on powdered samples with the initial compositions YAl 3 (BO 3 ) 4 , Y 0.88 Er 0.12 Al 3 (BO 3 ) 4 , Y 0.5 Er 0.5 Al 3 (BO 3 ) 4 , Y 0.5 Yb 0.5 Al 3 (BO 3 ) 4 , and Y 0.84 Er 0.01 Yb 0.15 Al 3 (BO 3 ) 4 , grown by the topseeded high temperature solution method, crystallized in the space group R32 [90].…”

“…Single crystals with the initial composition LnSc 3 (BO 3 ) 4 with the Ln = La [74,75], Ce [81], Pr [80,88], Nd [77,80,88], Sm [80,88], Eu [88], obtained by the flux method (the NdSc 3 (BO 3 ) 4 were grown by the Czochralski method [77]), and also with the Ln = Gd [36,37] and Y [36,37], grown by the TSSG method, have a modification with the huntite structure (space group R32) (Figures 1 and 2). Fedorova et al [78] as well as Li et al [25] and Ye et al [31] could not obtain a stable modification of LaSc 3 (BO 3 ) 4 with the space group R32 by solid state reaction (LaSc 3 (BO 3 ) 4 samples with the space group C2/c have been obtained) and by a high-temperature solution method, respectively, suggesting that this phase seems to be metastable or stable in a narrow temperature range.…”

Crystal Growth of Multifunctional Borates and Related Materials

“…Crystal structures of single crystals were refined within the framework of the huntite structure (space group R32) for the LnAl 3 (BO 3 ) 4 (Ln = Nd, Sm, Eu, Gd, (Y), Tm, Yb), LnFe 3 (BO 3 ) 4 (Ln = La, Nd, Eu, Gd, Er), LnGa 3 (BO 3 ) 4 (Ln = Nd, Eu, Ho), LnSc 3 (BO 3 ) 4 (Ln = La, Ce, Pr, Nd, Sm, Eu) by the X-ray diffraction (XRD) analysis (Table 1). It should be noted that in some literature sources (in particular, in [27]) it was not indicated on which samples, single-crystal or polycrystalline, a structural analysis has been performed; in [15,36,37,80], any methodology of structural studies is absent, the method of investigation, X-ray diffraction, being indicated only. Neutron diffraction study performed on powdered samples with the initial compositions YAl 3 (BO 3 ) 4 , Y 0.88 Er 0.12 Al 3 (BO 3 ) 4 , Y 0.5 Er 0.5 Al 3 (BO 3 ) 4 , Y 0.5 Yb 0.5 Al 3 (BO 3 ) 4 , and Y 0.84 Er 0.01 Yb 0.15 Al 3 (BO 3 ) 4 , grown by the topseeded high temperature solution method, crystallized in the space group R32 [90].…”

Spectroscopic properties of nonlinear NdSc3(BO3)4

“…where values for 2 , 4 , and 6 for Nd 3ϩ are given by Morrison and Leavitt. 16 Equation ͑1͒ is diagonalized, together with an effective free-ion Hamiltonian of the form…”

“…4,5 These crystals have spectroscopic properties representing a family of compounds now available for evaluation as laserhost materials and optical parametric oscillators. [6][7][8][9][10][11] Prototypes of a tunable ultraviolet Ce 3ϩ -doped LnSB laser have been proposed, 8 and self-frequency doubling has been observed for Nd 3ϩ in YAl 3 ͑BO 3 ͒ 4 ͑YAB͒. 9 We report the spectroscopic properties of Nd 3ϩ in NdSc 3 ͑BO 3 ͒ 4 ͑NdSB͒.…”