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 ZrAlRh2 (Materials Project id mp-977435)

        91      257      257        0        0        0  
       257       91      257        0        0        0  
       257      257       91        0        0        0  
         0        0        0       60        0        0  
         0        0        0        0       60        0  
         0        0        0        0        0       60  

Average properties

Averaging schemeBulk modulusYoung's modulusShear modulusPoisson's ratio
VoigtKV = 201.67 GPaEV = 8.3613 GPaGV = 2.8 GPaνV = 0.49309
ReussKR = 201.67 GPaER = 439.01 GPaGR = 193.02 GPaνR = 0.13718
HillKH = 201.67 GPaEH = 252.82 GPaGH = 97.912 GPaνH = 0.29106

Eigenvalues of the stiffness matrix

λ1 λ2 λ3 λ4 λ5 λ6
-166 GPa -166 GPa 60 GPa 60 GPa 60 GPa 605 GPa
Stiffness matrix is not definite positive, crystal is mechanically unstable
No further analysis will be performed.