Elastic Constants of Sodium Nitrate from 77 to 300 K

The six independent elastic constants of sodium nitrate are determined using 10 MHz ultrasonic pulse echo superposition technique over the temperature interval 77 to 300 K. The values obtained at 300 K are C11 = 5.71, C12 = 2.16, C33 = 3.3, C13 = 1.66, C44 = 1.24, C14 = 0.82, and at 77 K C11 = 6.63, C12 = 2.07, C33 = 3.99, C13 = 1.67, C44 = 1.69, C14 = 1.16 all expressed in units of 1011 dyn/cm2. Die sechs unabhangigen elastischen Konstanten von Natriumnitrat werden bestimmt, indem im Temperaturbereich 77 bis 300 K die Echouberlagerungsmethode von 10 MHz Ultraschallimpulsen benutzt wird. Die bei 300 K erhaltenen Werte sind C11 = 5,71; C12 = 2,16; C33 = 3,3; C13 = 1,66; C44 = 1,24; C14 = 0,82 und bei 77 K C11 = 6,63; C12 = 2,07; C33 = 3,99; C13 = 1,67; C44 = 1,69; C14 = 1,16 (alle in Einheiten von 1011 dyn/cm2).