Materials Data on Np(FeP3)4 by Materials Project
Np(FeP3)4 crystallizes in the cubic Im-3 space group. The structure is three-dimensional. Np3+ is bonded to twelve equivalent P1- atoms to form NpP12 cuboctahedra that share faces with eight equivalent FeP6 octahedra. All Np–P bond lengths are 2.95 Å. Fe+2.25+ is bonded to six equivalent P1- atoms to form FeP6 octahedra that share corners with six equivalent FeP6 octahedra and faces with two equivalent NpP12 cuboctahedra. The corner-sharing octahedral tilt angles are 58°. All Fe–P bond lengths are 2.22 Å. P1- is bonded in a distorted bent 120 degrees geometry to one Np3+, two equivalent Fe+2.25+, and two equivalent P1- atoms. There are one shorter (2.34 Å) and one longer (2.35 Å) P–P bond lengths.
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