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 Be (Materials Project id mp-20)

       153      109      109        0        0        0  
       109      153      109        0        0        0  
       109      109      153        0        0        0  
         0        0        0      188        0        0  
         0        0        0        0      188        0  
         0        0        0        0        0      188  

Average properties

Averaging schemeBulk modulusYoung's modulusShear modulusPoisson's ratio
VoigtKV = 123.67 GPaEV = 274.75 GPaGV = 121.6 GPaνV = 0.12972
ReussKR = 123.67 GPaER = 124.64 GPaGR = 46.787 GPaνR = 0.33202
HillKH = 123.67 GPaEH = 205.86 GPaGH = 84.194 GPaνH = 0.22256

Eigenvalues of the stiffness matrix

λ1 λ2 λ3 λ4 λ5 λ6
44 GPa 44 GPa 188 GPa 188 GPa 188 GPa 371 GPa

Variations of the elastic moduli

Young's modulusLinear compressibility Shear modulusPoisson's ratio
EminEmax βminβmaxGminGmax νminνmax
Value 62.305 GPa 374.32 GPa 2.6954 TPa–1 2.6954 TPa–1 22 GPa 188 GPa-0.557931.1099Value
Anisotropy 6.008 1.0000 8.545Anisotropy
Axis 0.0000
1.0000
0.0000
0.5774
0.5773
-0.5774
0.0000
0.0000
1.0000
0.1316
0.9827
0.1305
0.7071
-0.0003
0.7071
0.0000
0.0000
1.0000
0.7071
0.0001
-0.7071
0.0000
0.7071
-0.7071
Axis
0.7071
-0.0005
-0.7071
0.7660
0.6428
-0.0000
-0.7071
-0.0002
-0.7071
-1.0000
0.0000
0.0000
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