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Synthesis and X-ray investigation of new Y1-xRxCa4O(BO3)3 (R = Sc, Lu) nonlinear materials

L. GHEORGHE1,* , A. ACHIM1, B. SBARCEA2, S. MITREA2

Affiliation

  1. National Institute R&D for Laser, Plasma and Radiation Physics, Laboratory of Solid-State Quantum Electronics, 077125, Bucharest-Magurele, Romania
  2. National Institute R&D in Electrical Engineering ICPE-CA, Laboratory for materials and electrotechnical products testing and characterizations, 030138, Bucharest, Romania

Abstract

Nonlinear materials Y1-xRxCa4O(BO3)3 (R = Lu or Sc) with 0 < x ≤ 0.5 were synthesized for the first time. The room temperature X-ray diffraction studies show that Y1-xLuxCa4O(BO3)3 and Y1-xScxCa4O(BO3)3 compounds with x < 0.4 and x ≤0.2, respectively, have single phase monoclinic symmetry (space group Cm) and conform to the Vegard law, according to which the lattice parameters are linearly dependent on the impurity (R3+) concentration. The X-ray patterns of Y1-xRxCa4O(BO3)3 materials with x ≥ 0.4 and x > 0.2, respectively, reveal the presence of extra phases which imply their noncongruent melting and difficulties in crystals growth..

Keywords

Nonlinear materials, Solid solutions, Rare earth calcium oxoborates, X-ray powder diffraction.

Citation

L. GHEORGHE, A. ACHIM, B. SBARCEA, S. MITREA, Synthesis and X-ray investigation of new Y1-xRxCa4O(BO3)3 (R = Sc, Lu) nonlinear materials, Optoelectronics and Advanced Materials - Rapid Communications, 4, 3, March 2010, pp.318-321 (2010).

Submitted at: Feb. 25, 2010

Accepted at: March 12, 2010