Materials Data on PaSb2 by Materials Project
PaSb2 crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. Pa5+ is bonded in a 9-coordinate geometry to nine Sb+2.50- atoms. There are a spread of Pa–Sb bond distances ranging from 3.15–3.26 Å. There are two inequivalent Sb+2.50- sites. In the first Sb+2.50- site, Sb+2.50- is bonded to five equivalent Pa5+ atoms to form a mixture of distorted corner and edge-sharing SbPa5 trigonal bipyramids. In the second Sb+2.50- site, Sb+2.50- is bonded in a 8-coordinate geometry to four equivalent Pa5+ and four equivalent Sb+2.50- atoms. All Sb–Sb bond lengths are 3.06 Å.
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