# ELATE: Elastic tensor analysis

Welcome to ELATE, the online tool for analysis of elastic tensors, developed by **Romain Gaillac** and **François-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 PaC (Materials Project id mp-567580)

295 110 110 0 0 0 110 295 110 0 0 0 110 110 295 0 0 0 0 0 0 71 0 0 0 0 0 0 71 0 0 0 0 0 0 71

### Average properties

Averaging scheme | Bulk modulus | Young's modulus | Shear modulus | Poisson's ratio |
---|---|---|---|---|

Voigt | K_{V} = 171.67 GPa | E_{V} = 206.83 GPa | G_{V} = 79.6 GPa | ν_{V} = 0.29919 |

Reuss | K_{R} = 171.67 GPa | E_{R} = 203.85 GPa | G_{R} = 78.278 GPa | ν_{R} = 0.30209 |

Hill | K_{H} = 171.67 GPa | E_{H} = 205.34 GPa | G_{H} = 78.939 GPa | ν_{H} = 0.30064 |

### Eigenvalues of the stiffness matrix

λ_{1} |
λ_{2} |
λ_{3} |
λ_{4} |
λ_{5} |
λ_{6} |
---|---|---|---|---|---|

71 GPa | 71 GPa | 71 GPa | 185 GPa | 185 GPa | 515 GPa |

### Variations of the elastic moduli

Young's modulus | Linear compressibility | Shear modulus | Poisson's ratio | ||||||
---|---|---|---|---|---|---|---|---|---|

E_{min} | E_{max} |
β_{min} | β_{max} | G_{min} | G_{max} |
ν_{min} | ν_{max} | ||

Value | 187.19 GPa | 235.25 GPa | 1.9417 TPa^{–1} | 1.9417 TPa^{–1} | 71 GPa | 92.5 GPa | 0.22775 | 0.3892 | Value |

Anisotropy | 1.257 | 1.0000 | 1.303 | 1.7089 | Anisotropy | ||||

Axis | 0.5774 0.5773 -0.5774 |
0.0000 0.0000 1.0000 |
0.0000 0.0000 1.0000 |
-0.5624 0.7330 0.3827 |
0.0000 0.0000 1.0000 |
0.7071 0.0001 -0.7071 |
0.7071 -0.0000 -0.7071 |
0.7071 -0.0000 -0.7071 |
Axis |

0.7660 0.6428 -0.0000 |
-0.7071 -0.0002 -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