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 GeO2 (Materials Project id mp-2633)

       437      136      136        0        0        0  
       136      437      136        0        0        0  
       136      136      437        0        0        0  
         0        0        0      147        0        0  
         0        0        0        0      147        0  
         0        0        0        0        0      147  

Average properties

Averaging schemeBulk modulusYoung's modulusShear modulusPoisson's ratio
VoigtKV = 236.33 GPaEV = 368.14 GPaGV = 148.4 GPaνV = 0.24038
ReussKR = 236.33 GPaER = 368.1 GPaGR = 148.38 GPaνR = 0.24041
HillKH = 236.33 GPaEH = 368.12 GPaGH = 148.39 GPaνH = 0.24039

Eigenvalues of the stiffness matrix

λ1 λ2 λ3 λ4 λ5 λ6
147 GPa 147 GPa 147 GPa 301 GPa 301 GPa 709 GPa

Variations of the elastic moduli

Young's modulusLinear compressibility Shear modulusPoisson's ratio
EminEmax βminβmaxGminGmax νminνmax
Value 365.27 GPa 372.44 GPa 1.4104 TPa–1 1.4104 TPa–1 147 GPa 150.5 GPa0.23390.24842Value
Anisotropy 1.02 1.0000 1.024 1.0621Anisotropy
Axis 0.5774
0.5774
0.5773
-0.0000
-0.0000
1.0000
0.0000
0.0000
1.0000
0.0000
0.0000
1.0000
0.0000
0.0000
1.0000
0.7071
-0.0003
0.7071
0.7071
-0.0000
0.7071
0.7071
-0.0000
-0.7071
Axis
1.0000
0.0000
-0.0000
0.7071
-0.0005
-0.7071
0.0000
1.0000
0.0000
-0.7071
0.0002
-0.7071
Second axis

Spatial dependence of Young's modulus



Young's modulus in (xy) plane

Young's modulus in (xz) plane

Young's modulus in (yz) plane

Spatial dependence of linear compressibility



linear compressibility in (xy) plane

linear compressibility in (xz) plane

linear compressibility in (yz) plane

Spatial dependence of shear modulus



Shear modulus in (xy) plane

Shear modulus in (xz) plane

Shear modulus in (yz) plane

Spatial dependence of Poisson's ratio



Poisson's ratio in (xy) plane

Poisson's ratio in (xz) plane

Poisson's ratio in (yz) plane