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 AgAsF6 (Materials Project id mp-37153)

        59       19       19        0        0        0  
        19       59       19        0        0        0  
        19       19       59        0        0        0  
         0        0        0       -1        0        0  
         0        0        0        0       -1        0  
         0        0        0        0        0       -1  

Average properties

Averaging schemeBulk modulusYoung's modulusShear modulusPoisson's ratio
VoigtKV = 32.333 GPaEV = 20.626 GPaGV = 7.4 GPaνV = 0.39368
ReussKR = 32.333 GPaER = -5.266 GPaGR = -1.7241 GPaνR = 0.52714
HillKH = 32.333 GPaEH = 8.2718 GPaGH = 2.8379 GPaνH = 0.45736

Eigenvalues of the stiffness matrix

λ1 λ2 λ3 λ4 λ5 λ6
-1 GPa -1 GPa -1 GPa 40 GPa 40 GPa 97 GPa
Stiffness matrix is not definite positive, crystal is mechanically unstable
No further analysis will be performed.