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Diamond (C)

diamond (A4) · Fd-3m (227)

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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)