Three-Cation Scandium Borates RxLa1−XSc3(BO3)4(R = Sm, Tb): Synthesis, Structure, Crystal Growth and Luminescent Properties

A Kokh,B Uralbekov,V Shevchenko,V Svetlichnyi,N Kononova,K Kokh,A Kuznetsov,A Bolatov

doi:10.1007/978-3-030-22974-0_64

A Kokh, B Uralbekov + Show 6 more

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https://doi.org/10.1007/978-3-030-22974-0_64

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Abstract

Complex ortohoborates of rare earth metals with the general chemical formula RxLa1−xSc3(BO3)4 (R = Sm, Tb) have been obtained by solid state synthesis and spontaneous crystallization. These crystals belong to the huntite family with the space group R32 and for x = 0.5 have unit cell parameters a = 9.823(6), c = 7.975(3) (SLSB) and a = 9.803(3), c = 7.960(4) A (TLSB).

Highlights

IntroductionOne of the important properties of these compounds is the ability to form a non-centrosymmetric structure, which is called huntite-like
Orthoborates with the general formula RX3(BO3)4, where R = Y, Ln; X = Al, Ga, Sc, Cr, Fe are practically important and interesting from the point of view of crystal chemistry objects for research
Kokh et al RxLayScz(BO3)4 nonlinear optical crystals with a stable huntite-like structure were obtained with R = Gd (Xu et al, 2011); Y (Ye et al 2005) and Lu (Li et al 2007)

Summary

Introduction

One of the important properties of these compounds is the ability to form a non-centrosymmetric structure, which is called huntite-like. Such a structure causes, for example, non-linear optical properties. To understand the formation of the huntite-like structure of three-cation scandoborates, we consider the lanthanum – scandium borate LaSc3(BO3). Kokh et al RxLayScz(BO3) nonlinear optical crystals with a stable huntite-like structure were obtained with R = Gd (Xu et al, 2011); Y (Ye et al 2005) and Lu (Li et al 2007). The existence of a huntite-like structure for the boundary members of the REE series suggests the stability of such a structure with the rest of the REE.

Methods and Approaches

Results and Discussion

Conclusions