The dislocation motion during the high-temperature deformation of single crystals was investigated. Compressive deformation along various crystallographic axes at 1640C resulted in slip on {110} planes. The Burgers vector was determined to be ½<1¯11>. Dislocations with such a large (0.91nm) Burgers vector could dissociate into ¼<1¯10> and ¼<1¯12> partials. Cleavage was found to occur on {111} planes at room temperature.

Slip Systems in Erbia Single Crystals. A.A.Sharif, A.Misra, J.J.Petrovic, T.E.Mitchell: Key Engineering Materials, 2000, 171-174, 801-8