Body-centred cubic W

Unit cell

Lattice constants

a = 3.165 Å, b = 3.165 Å, c = 3.165 Å; α = 90°, β = 90°, γ = 90°

Cell volume

31.7 ų

Atoms in the cell

2 (W 2)

Formula units Z

2

Calculated density

19.26 g cm⁻³

Shortest contact

2.741 Å

Packing efficiency

68.0 %

Coordination

W

CN 8 at 2.74 Å (8 W)

About the structure

• Atoms touch along the body diagonal: √3·a = 4r, packing efficiency ≈ 68%.
• Fe (α), Cr, Mo, W, Na, K adopt this structure.
• Not close-packed: coordination number 8, with 6 more neighbours only 15% further away.

Atom positions (fractional, one cell)

Z, coordination numbers, distances, density and packing on this page are computed from these coordinates.