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 Sr2MoO4 (Materials Project id mp-19237)

        20      332       81        0        0        0  
       332       20       81        0        0        0  
        81       81      203        0        0        0  
         0        0        0       29        0        0  
         0        0        0        0       29        0  
         0        0        0        0        0       41  

Average properties

Averaging schemeBulk modulusYoung's modulusShear modulusPoisson's ratio
VoigtKV = 136.78 GPaEV = 9.1318 GPaGV = 3.0667 GPaνV = 0.48887
ReussKR = 134.41 GPaER = 132.26 GPaGR = 49.498 GPaνR = 0.336
HillKH = 135.59 GPaEH = 74.062 GPaGH = 26.282 GPaνH = 0.40897

Eigenvalues of the stiffness matrix

λ1 λ2 λ3 λ4 λ5 λ6
-312 GPa 29 GPa 29 GPa 41 GPa 140.85 GPa 414.15 GPa
Stiffness matrix is not definite positive, crystal is mechanically unstable
No further analysis will be performed.