Table 3 List of non-zero elastic constants and the corresponding number of required deformations for various crystal systems
From: Anisotropic temperature-dependent lattice parameters and elastic constants from first principles
Crystal | Elastic constant | #deform |
|---|---|---|
Cubic | C11, C12, C44 | 6 |
Hexagonal | C11, C12, C13, C33, C44 | 9 |
Trigonal (Rhombohedral) | C11, C12, C13, C14, C33, C44 | 10 |
Tetragonal | C11, C12, C13, C33, C44, C66 | 11 |
Orthorhombic | C11, C12, C13, C22, C23, C33, C44, C55, C66 | 16 |
Monoclinic | C11, C12, C13, C15, C22, C23, C25, C33, C35, C44, C46, C55, C66 | 18 |
Triclinic | Cij7D1fori, j = 1, 2, …, 6 | 28 |
