ChemInform Abstract: Structure and Synthesis of Lutetium Germanate Lu6Ge4O17.

Abstract

Structure and Synthesis of Lutetium Germanate Lu6Ge4O17.-Crystals of novel compound Lu6Ge4O17 are grown using the method of spontaneous crystallization from melts of Lu2O3, GeO2, B2O3 and PbO as flux. The germanate crystallizes in the monoclinic system (space group P2/c, Z = 2). X-ray studies indicate the presence of two kinds of anionic groupings, slightly distorted tetrahedral GeO4-4-anions and Ge2O6-7-anions of angular structure. Three crystallographically independent Lu-atoms with octahedral oxygen coordination are detected. -(PALKINA, K. K.; KUZ'MINA, N. E.; LYSANOVA, G. V.; DZHURINSKII, B. F.; KOMOVA, M. G.; Zh. Neorg.

Observation of many-phonon stimulated Raman scattering and related cascaded nonlinear-laser effects in monoclinic LaBO2MoO4 single crystals

“…From the similarity of powder diffraction patterns it was concluded that these crystals show a very similar or even isomorphic structure, but, a crystal structure determination is reported for the title compound LaBO 2 MoO 4 , only [32]. Besides the evidence of their existence and the crystal structure information, no further data about the series LnBO 2 M O 4 are given in literature.…”

“…The origin of this phenomenon is subject to further studies. Typically, our crystals of LaBO • , that we determined from refined powder X-ray diffraction data (note that in [32] a different set- [32], see Fig. 1.…”

“…a) Our setting of the lattice is different from that of [32] with a transformation matrix Table 2 Crystallographic and some physical properties of monoclinic LaBO2MoO4 single crystals at room temperature (limit of probable error in parentheses)…”

“…LaBO 2 MoO 4 is a member of a series of compounds of the general composition LnBO 2 MO 4 that are reported with Ln = La -Nd and M = Mo, W. These compounds were found in the course of rough investigations of the ternary systems [29][30][31]. From the similarity of powder diffraction patterns it was concluded that these crystals show a very similar or even isomorphic structure, but, a crystal structure determination is reported for the title compound LaBO 2 MoO 4 , only [32]. Besides the evidence of their existence and the crystal structure information, no further data about the series LnBO 2 M O 4 are given in literature.…”

Monoclinic LaBO2MoO4:Nd3+- a new SE- and (χ(2)+χ(3))-active crystal for multifunctional lasers

“…Although the refractive indices offer the possibility for phase-matched generation of the second harmonic with type I phase-matching for wavelengths above ≈ 0.89 µm and additionally phase-matching type II for wavelengths above ≈ 1.28 µm of the fundamental wave (see Fig. 1), and the crystal structure is reported to have a pronounced polar symmetry with space group P2 1 [13], only a very weak SHG was detected in our previous investigations [9]. From temperature-dependent polarization microscopy no hints to any structural instability could be found in the temperature region between 100 K and 1273 K, especially, no hints to twin formation was found in transmitted polarized light.…”