The liquidus temperature curve for the system of KY(WO4)2: Er3+:Nd3+ -
K2WO4 was determined by means of differential thermal analysis (DTA),
and large crystals of KY(WO4)2: Er3+:Nd3+ with dimensions of up to 45
mm have been grown from a K2WO4 flux. From the crystal boule grown, a
high-quality laser crystal rod of up to 3 mm in diameter and 11.9 mm l
ength was cut out, and its absorption spectrum was measured.