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 Rb2NaTlF6 (Materials Project id mp-989548)

        87       -5       -5        0        0        0  
        -5       87       -5        0        0        0  
        -5       -5       87        0        0        0  
         0        0        0       21        0        0  
         0        0        0        0       21        0  
         0        0        0        0        0       21  

Average properties

Averaging schemeBulk modulusYoung's modulusShear modulusPoisson's ratio
VoigtKV = 25.667 GPaEV = 66.306 GPaGV = 31 GPaνV = 0.069444
ReussKR = 25.667 GPaER = 59.697 GPaGR = 26.833 GPaνR = 0.11236
HillKH = 25.667 GPaEH = 63.066 GPaGH = 28.917 GPaνH = 0.09048

Eigenvalues of the stiffness matrix

λ1 λ2 λ3 λ4 λ5 λ6
21 GPa 21 GPa 21 GPa 77 GPa 92 GPa 92 GPa

Variations of the elastic moduli

Young's modulusLinear compressibility Shear modulusPoisson's ratio
EminEmax βminβmaxGminGmax νminνmax
Value 49.5 GPa 86.39 GPa 12.987 TPa–1 12.987 TPa–1 21 GPa 46 GPa-0.0609760.31943Value
Anisotropy 1.745 1.0000 2.19Anisotropy
Axis -0.5774
0.5774
-0.5773
1.0000
0.0000
0.0000
0.8677
-0.0000
0.4972
0.3536
0.8536
0.3827
0.0000
0.0000
1.0000
0.7071
0.0001
-0.7071
-0.0000
-0.0000
1.0000
0.7071
-0.0000
-0.7071
Axis
-0.7660
-0.6428
0.0000
-0.7071
-0.0002
-0.7071
0.1709
0.9853
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