# 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 Rb2SnBr6 (Materials Project id mp-569028)

-6 4 4 0 0 0 4 -6 4 0 0 0 4 4 -6 0 0 0 0 0 0 5 0 0 0 0 0 0 5 0 0 0 0 0 0 5

### Average properties

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

Voigt | K_{V} = 0.66667 GPa | E_{V} = 2 GPa | G_{V} = 1 GPa | ν_{V} = 0 |

Reuss | K_{R} = 0.66667 GPa | E_{R} = 5.5556 GPa | G_{R} = 25 GPa | ν_{R} = -0.88889 |

Hill | K_{H} = 0.66667 GPa | E_{H} = 5.2 GPa | G_{H} = 13 GPa | ν_{H} = -0.8 |

### Eigenvalues of the stiffness matrix

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

-10 GPa | -10 GPa | 2 GPa | 5 GPa | 5 GPa | 5 GPa |

Stiffness matrix is not definite positive, crystal is mechanically unstable

No further analysis will be performed.

No further analysis will be performed.