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 AgHgPd2 (Materials Project id mp-861501)

       113      120      120        0        0        0  
       120      113      120        0        0        0  
       120      120      113        0        0        0  
         0        0        0       71        0        0  
         0        0        0        0       71        0  
         0        0        0        0        0       71  

Average properties

Averaging schemeBulk modulusYoung's modulusShear modulusPoisson's ratio
VoigtKV = 117.67 GPaEV = 110.68 GPaGV = 41.2 GPaνV = 0.34323
ReussKR = 117.67 GPaER = -29.126 GPaGR = -9.4487 GPaνR = 0.54125
HillKH = 117.67 GPaEH = 45.577 GPaGH = 15.876 GPaνH = 0.43544

Eigenvalues of the stiffness matrix

λ1 λ2 λ3 λ4 λ5 λ6
-7 GPa -7 GPa 71 GPa 71 GPa 71 GPa 353 GPa
Stiffness matrix is not definite positive, crystal is mechanically unstable
No further analysis will be performed.