Open AccessCALCULATIONS OF ELASTIC CONSTANTS AND ULTRASONIC VELOCITIES FOR LaNbO4 CRYSTAL
Author(s) -
Tao Rui-Bao,
Chuanhong Chen,
Shijie Chen
Publication year - 1988
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.37.608
Subject(s) - force constant , ultrasonic sensor , crystal (programming language) , materials science , thermodynamics , basis (linear algebra) , constant (computer programming) , physics , quantum mechanics , molecule , mathematics , geometry , acoustics , computer science , programming language
General expressions for elastic constants and analytic formulas for calculating force constants from the elastic constants were derived by means of group theory. On the basis of an approxomation of four nearest neighbour force constants, several ultrasonic wave velocities were calculated for LaNbO4 crystal.