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About
Each carbon is covalently bonded to four others at the corners of a tetrahedron, forming a rigid three-dimensional network — the origin of diamond's hardness. Two fcc carbon lattices offset by a quarter body-diagonal.
Structure
Prototypediamond (A4)
Crystal systemcubic
Space groupFd-3m (227)
Latticea = 3.5668 Å
Anglesall 90°
Elements
Also crystallizes this way
SiGeα-Sn (grey tin)
Sources
- Structure: Crystallography Open Database (COD)
- Lattice parameters: Wyckoff, Crystal Structures — a = 3.567 Å