Materials Data on Eu3W by Materials Project
Eu3W is alpha bismuth trifluoride structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Eu sites. In the first Eu site, Eu is bonded in a 4-coordinate geometry to four equivalent Eu and four equivalent W atoms. All Eu–Eu bond lengths are 3.40 Å. All Eu–W bond lengths are 3.40 Å. In the second Eu site, Eu is bonded to eight equivalent Eu and four equivalent W atoms to form EuEu8W4 cuboctahedra that share corners with four equivalent EuEu8W4 cuboctahedra, corners with eight equivalent WEu12 cuboctahedra, edges with eight equivalent EuEu8W4 cuboctahedra, faces with four equivalent EuEu8W4 cuboctahedra, and faces with six equivalent WEu12 cuboctahedra. All Eu–W bond lengths are 3.57 Å. W is bonded to twelve Eu atoms to form WEu12 cuboctahedra that share corners with four equivalent WEu12 cuboctahedra, corners with eight equivalent EuEu8W4 cuboctahedra, edges with eight equivalent WEu12 cuboctahedra, faces with four equivalent WEu12 cuboctahedra, and faces with six equivalent EuEu8W4 cuboctahedra.