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 FePt3 (Materials Project id mp-649)

       350      225      225        0        0        0  
       225      350      225        0        0        0  
       225      225      350        0        0        0  
         0        0        0      120        0        0  
         0        0        0        0      120        0  
         0        0        0        0        0      120  

Average properties

Averaging schemeBulk modulusYoung's modulusShear modulusPoisson's ratio
VoigtKV = 266.67 GPaEV = 259.53 GPaGV = 97 GPaνV = 0.33779
ReussKR = 266.67 GPaER = 237.15 GPaGR = 87.719 GPaνR = 0.35178
HillKH = 266.67 GPaEH = 248.4 GPaGH = 92.36 GPaνH = 0.34475

Eigenvalues of the stiffness matrix

λ1 λ2 λ3 λ4 λ5 λ6
120 GPa 120 GPa 120 GPa 125 GPa 125 GPa 800 GPa

Variations of the elastic moduli

Young's modulusLinear compressibility Shear modulusPoisson's ratio
EminEmax βminβmaxGminGmax νminνmax
Value 173.91 GPa 313.04 GPa 1.25 TPa–1 1.25 TPa–1 62.5 GPa 120 GPa0.0869570.58696Value
Anisotropy 1.8 1.0000 1.92 6.7500Anisotropy
Axis 1.0000
0.0000
0.0000
0.5774
0.5774
0.5773
0.9659
0.0000
0.2588
0.2241
0.8365
0.5000
0.7071
0.0001
-0.7071
0.0000
0.0000
1.0000
0.7071
-0.0002
0.7071
0.0000
0.7071
0.7071
Axis
-0.7071
-0.0002
-0.7071
0.7660
0.6428
-0.0000
0.7071
-0.0006
-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