On relaxation phenomena in filamentary NaCl crystals

The internal friction and reversible creep of filamentary sodium chloride crystals are investigated. An internal friction peak, associated with the reorientation of the impurity-vacancy complexes in an elastic field is detected. The activation energy of the process is determined. The correlation between the internal friction level and the size of the filamentary crystal, as well as its electric charge, are established. The relaxation time of the reversible creep of filamentary crystals in a 10 kV/cm electrical field is estimated.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 4, pp. 101–104, April, 1973.