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 YSb2 (Materials Project id mp-1018112)

        61       30       48        0        0        0  
        30       55       24        0        0        0  
        48       24      104        0        0        0  
         0        0        0       16        0        0  
         0        0        0        0       -1        0  
         0        0        0        0        0       30  

Average properties

Averaging schemeBulk modulusYoung's modulusShear modulusPoisson's ratio
VoigtKV = 47.111 GPaEV = 45.205 GPaGV = 16.867 GPaνV = 0.34008
ReussKR = 42.617 GPaER = -20.338 GPaGR = -6.438 GPaνR = 0.57954
HillKH = 44.864 GPaEH = 15.06 GPaGH = 5.2143 GPaνH = 0.44406

Eigenvalues of the stiffness matrix

λ1 λ2 λ3 λ4 λ5 λ6
-1 GPa 16 GPa 22.714 GPa 30 GPa 47.922 GPa 149.36 GPa
Stiffness matrix is not definite positive, crystal is mechanically unstable
No further analysis will be performed.