β-W has a cubic A15 structure with space group , which belongs to the Frank–Kasper phases family. Each unit cell contains eight tungsten atoms. The structure can be seen as a cubic lattice with one atom at each corner, one atom in the center, and two atoms on each face. There are two inequivalent tungsten sites corresponding to Wyckoff positions  and , respectively. On the first site, Wyckoff position , each tungsten atom is bonded to twelve equivalent W atoms to form a mixture of edge- and face-sharing WW cuboctahedratungsten. On the second site, with Wyckoff position , each tungsten atom is bonded to fourteen neighboring tungsten atoms, and there is a spread of W–W bond lengths ranging from 2.54 to 3.12 Å. The experimentally measured lattice parameter of β-W is 5.036 Å, while the DFT calculated value is 5.09 Å.