Abstract
The crystal structure of new lanthanum strontium borate glass-ceramics was refined by the Rietveld method. The results showed that La2SrB10O19 has the monoclinic crystal structure, space group C2 (No. 5) with a = 11.1170(6), b = 6.5667(3), c = 9.2363(3) ?, ? = 91.481?, V = 674.04(7) ?3, two formula units per unit-cell, and density 3.830 g cm?3. The main building units of the crystal structure are BO4 tetrahedra and BO3 triangles. Clusters composed of [B5O12] form an infinite double layer running perpendicular to the c-axis. Lanthanum atoms, situated in [B5O12]n layers, are coordinated with 10 oxygen atom in a form of LaO10 polyhedra, while Sr atoms, located between [B5O12]n layers, are coordinated with 8 oxygen atoms in a form of SrO8 polyhedra. Microstructural measurements contain both crystallite domain sizes and microstrain calculations obtained by the Warren-Averbach and the simplified integral-breadth methods.
Highlights
In recent years, a lot of scientific efforts have been put in studying new non-linear optical materials (NLO) due to their application in electronic devices
The crystal structure of new lanthanum strontium borate glass-ceramics was refined by the Rietveld method
Borate crystals are used as solid-state laser hosts and as NLO materials with good second harmonic generation (SHG) efficiency [1]
Summary
A lot of scientific efforts have been put in studying new non-linear optical materials (NLO) due to their application in electronic devices. Borate crystals are used as solid-state laser hosts and as NLO materials with good second harmonic generation (SHG) efficiency [1]. Lanthanide borate glasses and glass-ceramics are recognized as materials for the application as laser hosts, NLO and in the optoelecrtonics [2]. Cao et al (2000) [5] published a paper describing the acquisition and characteristics of the crystalline phase La2SrB10O19, expecting that this crystal display its good properties as NLO material as well as other advantages such as hardness and chemical resistance. The crystalline phase La2SrB10O19 in that study was obtained by a classical solid-
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