Formation of ''hair'' inclusions in rapidly grown potassium dihydrogen phosphate crystals

A special kind of liquid inclusions named ''hairs'' are described in the present work. These inclusions were observed in the crystals grown from a point seed at rates of 10-30 mm per day in the [001] direction. It was shown that formation of ''hair'' inclusions cannot be described by known mechanisms. Their occurrence is not connected with the dislocation structure bur probably induced by the morphological conditions on growing surface at high growth velocities.