Has a version
Si Fd-3m primitive cell (mp-149) - relaxed
Si diamond cubic primitive cell (Fd-3m, mp-149). 2 atoms, a=3.8493 Å, γ=60°. No free Wyckoff coordinates (8a). Non-magnetic, non-layered, covalent bonding. Discriminator test for Orb v3 symmetry erasure Mode 1/2 framework.