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 YbBPd3 (Materials Project id mp-10135)

       175       89       89        0        0        0  
        89      175       89        0        0        0  
        89       89      175        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 = 117.67 GPaEV = 47.563 GPaGV = 16.6 GPaνV = 0.43263
ReussKR = 117.67 GPaER = -5.1032 GPaGR = -1.6929 GPaνR = 0.50723
HillKH = 117.67 GPaEH = 21.898 GPaGH = 7.4535 GPaνH = 0.46898

Eigenvalues of the stiffness matrix

λ1 λ2 λ3 λ4 λ5 λ6
-1 GPa -1 GPa -1 GPa 86 GPa 86 GPa 353 GPa
Stiffness matrix is not definite positive, crystal is mechanically unstable
No further analysis will be performed.