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 LiAlPd2 (Materials Project id mp-867820)

        90      148      148        0        0        0  
       148       90      148        0        0        0  
       148      148       90        0        0        0  
         0        0        0       66        0        0  
         0        0        0        0       66        0  
         0        0        0        0        0       66  

Average properties

Averaging schemeBulk modulusYoung's modulusShear modulusPoisson's ratio
VoigtKV = 128.67 GPaEV = 78.319 GPaGV = 28 GPaνV = 0.39855
ReussKR = 128.67 GPaER = -1420.8 GPaGR = -212.67 GPaνR = 2.3404
HillKH = 128.67 GPaEH = -364.09 GPaGH = -92.333 GPaνH = 0.97162

Eigenvalues of the stiffness matrix

λ1 λ2 λ3 λ4 λ5 λ6
-58 GPa -58 GPa 66 GPa 66 GPa 66 GPa 386 GPa
Stiffness matrix is not definite positive, crystal is mechanically unstable
No further analysis will be performed.