ELATE: Elastic tensor analysis

Welcome to ELATE, the online tool for analysis of elastic tensors, developed by Romain Gaillac and Fran├žois-Xavier Coudert at CNRS / Chimie ParisTech.
If you use the software in published results (paper, conference, etc.), please cite the corresponding paper (J. Phys. Condens. Matter, 2016, 28, 275201) and give the website URL.

ELATE is open source software. Any queries or comments are welcome at

Summary of the properties

Input: stiffness matrix (coefficients in GPa) of USb2 (Materials Project id mp-2707)

         1      118       42        0        0        0  
       118        1       42        0        0        0  
        42       42      120        0        0        0  
         0        0        0       24        0        0  
         0        0        0        0       24        0  
         0        0        0        0        0       45  

Average properties

Averaging schemeBulk modulusYoung's modulusShear modulusPoisson's ratio
VoigtKV = 58.444 GPaEV = 37 GPaGV = 13.267 GPaνV = 0.39449
ReussKR = 56.293 GPaER = 99.547 GPaGR = 41.297 GPaνR = 0.20527
HillKH = 57.369 GPaEH = 70.646 GPaGH = 27.282 GPaνH = 0.29476

Eigenvalues of the stiffness matrix

λ1 λ2 λ3 λ4 λ5 λ6
-117 GPa 24 GPa 24 GPa 45 GPa 60.101 GPa 178.9 GPa
Stiffness matrix is not definite positive, crystal is mechanically unstable
No further analysis will be performed.