Patent ID: 6673330
Filing Date: 2004-01-06
Classification: C30B,Y10T

Abstract:
A single crystal of lithium niobate or lithium tantalate, grown from a melt of a composition having a molar excess of Li over a stoichiometric composition of lithium niobate or lithium tantalate, and having a molar fraction of Li2O/(Nb2O5+Li2O) or Li2O/(Ta2O5+Li2O) within a range of at least 0.490 and less than 0.500, and the single crystal has at least one element selected from the group consisting of Mg, Zn, Sc and In in an amount of from 0.1 to 3.0 mol % based on the total amount of the elements, Nb and Li, or the total amount of the elements, Ta and Li.