PROSES PEMISAHAN PARA-XYLENA TERDIRI DARI PERLAKUAN PENDAHULUAN DENGAN HIDROGENASI SELEKTIF DAN DENGAN TANAH LIAT TERAKTIFASI

摘要

Crystals for non-linear optics are disclosed. The crystals are prepared by crystallising a congruent melting composition of general formula: M4LnO(BO3)3, wherein M is Ca or Ca partially substituted by Sr or Ba, and Ln is a lanthanide from the group which includes Y, Gd, La and Lu. Said crystals are useful as frequency doublers and mixers, as an optical parametric oscillator or, when partially substituted by Nd3+, as a frequency doubling laser.