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 USnTe (Materials Project id mp-504687)

        35      129       48        0        0        0  
       129       35       48        0        0        0  
        48       48       81        0        0        0  
         0        0        0       22        0        0  
         0        0        0        0       22        0  
         0        0        0        0        0       45  

Average properties

Averaging schemeBulk modulusYoung's modulusShear modulusPoisson's ratio
VoigtKV = 66.778 GPaEV = 36.27 GPaGV = 12.867 GPaνV = 0.40947
ReussKR = 64.746 GPaER = 91.588 GPaGR = 36.222 GPaνR = 0.26424
HillKH = 65.762 GPaEH = 65.486 GPaGH = 24.545 GPaνH = 0.33403

Eigenvalues of the stiffness matrix

λ1 λ2 λ3 λ4 λ5 λ6
-94 GPa 22 GPa 22 GPa 42.937 GPa 45 GPa 202.06 GPa
Stiffness matrix is not definite positive, crystal is mechanically unstable
No further analysis will be performed.