Np3Te4 crystallizes in the triclinic P1 space group. There are six inequivalent Np sites. In the first Np site, Np(1) is bonded to one Te(1), one Te(2), one Te(3), one Te(4), one Te(5), one Te(6), one Te(7), and one Te(8) atom to form a mixture of distorted edge, corner, and face-sharing NpTe8 hexagonal bipyramids. In the second Np site, Np(2) is bonded to one Te(1), one Te(2), one Te(3), one Te(4), one Te(5), one Te(6), one Te(7), and one Te(8) atom to form a mixture of distorted edge, corner, and face-sharing NpTe8 hexagonal bipyramids. In the third Np site, Np(3) is bonded to one Te(1), one Te(2), one Te(3), one Te(4), one Te(5), one Te(6), one Te(7), and one Te(8) atom to form a mixture of distorted edge, corner, and face-sharing NpTe8 hexagonal bipyramids. In the fourth Np site, Np(4) is bonded to one Te(1), one Te(2), one Te(3), one Te(4), one Te(5), one Te(6), one Te(7), and one Te(8) atom to form a mixture of distorted edge, corner, and face-sharing NpTe8 hexagonal bipyramids. In the fifth Np site, Np(5) is bonded to one Te(1), one Te(2), one Te(3), one Te(4), one Te(5), one Te(6), one Te(7), and one Te(8) atom to form a mixture of distorted edge, corner, and face-sharing NpTe8 hexagonal bipyramids. In the sixth Np site, Np(6) is bonded to one Te(1), one Te(2), one Te(3), one Te(4), one Te(5), one Te(6), one Te(7), and one Te(8) atom to form a mixture of distorted edge, corner, and face-sharing NpTe8 hexagonal bipyramids. There are eight inequivalent Te sites. In the first Te site, Te(1) is bonded to one Np(1), one Np(2), one Np(3), one Np(4), one Np(5), and one Np(6) atom to form a mixture of distorted edge, corner, and face-sharing TeNp6 octahedra. The corner-sharing octahedral tilt angles range from 17-50°. In the second Te site, Te(2) is bonded to one Np(1), one Np(2), one Np(3), one Np(4), one Np(5), and one Np(6) atom to form a mixture of distorted edge, corner, and face-sharing TeNp6 octahedra. The corner-sharing octahedral tilt angles range from 16-50°. In the third Te site, Te(3) is bonded to one Np(1), one Np(2), one Np(3), one Np(4), one Np(5), and one Np(6) atom to form a mixture of distorted edge, corner, and face-sharing TeNp6 octahedra. The corner-sharing octahedral tilt angles range from 18-50°. In the fourth Te site, Te(4) is bonded to one Np(1), one Np(2), one Np(3), one Np(4), one Np(5), and one Np(6) atom to form a mixture of distorted edge, corner, and face-sharing TeNp6 octahedra. The corner-sharing octahedral tilt angles range from 16-51°. In the fifth Te site, Te(5) is bonded to one Np(1), one Np(2), one Np(3), one Np(4), one Np(5), and one Np(6) atom to form a mixture of distorted edge, corner, and face-sharing TeNp6 octahedra. The corner-sharing octahedral tilt angles range from 16-50°. In the sixth Te site, Te(6) is bonded to one Np(1), one Np(2), one Np(3), one Np(4), one Np(5), and one Np(6) atom to form a mixture of distorted edge, corner, and face-sharing TeNp6 octahedra. The corner-sharing octahedral tilt angles range from 17-51°. In the seventh Te site, Te(7) is bonded to one Np(1), one Np(2), one Np(3), one Np(4), one Np(5), and one Np(6) atom to form a mixture of distorted edge, corner, and face-sharing TeNp6 octahedra. The corner-sharing octahedral tilt angles range from 18-50°. In the eighth Te site, Te(8) is bonded to one Np(1), one Np(2), one Np(3), one Np(4), one Np(5), and one Np(6) atom to form a mixture of distorted edge, corner, and face-sharing TeNp6 octahedra. The corner-sharing octahedral tilt angles range from 16-50°.
Np3Te4 crystallizes in the triclinic P1 space group. There are six inequivalent Np sites. In the first Np site, Np(1) is bonded to one Te(1), one Te(2), one Te(3), one Te(4), one Te(5), one Te(6), one Te(7), and one Te(8) atom to form a mixture of distorted edge, corner, and face-sharing NpTe8 hexagonal bipyramids. The Np(1)-Te(1) bond length is 3.34 Å. The Np(1)-Te(2) bond length is 3.38 Å. The Np(1)-Te(3) bond length is 3.20 Å. The Np(1)-Te(4) bond length is 3.21 Å. The Np(1)-Te(5) bond length is 3.19 Å. The Np(1)-Te(6) bond length is 3.40 Å. The Np(1)-Te(7) bond length is 3.42 Å. The Np(1)-Te(8) bond length is 3.18 Å. In the second Np site, Np(2) is bonded to one Te(1), one Te(2), one Te(3), one Te(4), one Te(5), one Te(6), one Te(7), and one Te(8) atom to form a mixture of distorted edge, corner, and face-sharing NpTe8 hexagonal bipyramids. The Np(2)-Te(1) bond length is 3.20 Å. The Np(2)-Te(2) bond length is 3.38 Å. The Np(2)-Te(3) bond length is 3.40 Å. The Np(2)-Te(4) bond length is 3.19 Å. The Np(2)-Te(5) bond length is 3.21 Å. The Np(2)-Te(6) bond length is 3.36 Å. The Np(2)-Te(7) bond length is 3.21 Å. The Np(2)-Te(8) bond length is 3.37 Å. In the third Np site, Np(3) is bonded to one Te(1), one Te(2), one Te(3), one Te(4), one Te(5), one Te(6), one Te(7), and one Te(8) atom to form a mixture of distorted edge, corner, and face-sharing NpTe8 hexagonal bipyramids. The Np(3)-Te(1) bond length is 3.19 Å. The Np(3)-Te(2) bond length is 3.20 Å. The Np(3)-Te(3) bond length is 3.41 Å. The Np(3)-Te(4) bond length is 3.36 Å. The Np(3)-Te(5) bond length is 3.39 Å. The Np(3)-Te(6) bond length is 3.20 Å. The Np(3)-Te(7) bond length is 3.21 Å. The Np(3)-Te(8) bond length is 3.38 Å. In the fourth Np site, Np(4) is bonded to one Te(1), one Te(2), one Te(3), one Te(4), one Te(5), one Te(6), one Te(7), and one Te(8) atom to form a mixture of distorted edge, corner, and face-sharing NpTe8 hexagonal bipyramids. The Np(4)-Te(1) bond length is 3.42 Å. The Np(4)-Te(2) bond length is 3.19 Å. The Np(4)-Te(3) bond length is 3.41 Å. The Np(4)-Te(4) bond length is 3.38 Å. The Np(4)-Te(5) bond length is 3.19 Å. The Np(4)-Te(6) bond length is 3.36 Å. The Np(4)-Te(7) bond length is 3.19 Å. The Np(4)-Te(8) bond length is 3.19 Å. In the fifth Np site, Np(5) is bonded to one Te(1), one Te(2), one Te(3), one Te(4), one Te(5), one Te(6), one Te(7), and one Te(8) atom to form a mixture of distorted edge, corner, and face-sharing NpTe8 hexagonal bipyramids. The Np(5)-Te(1) bond length is 3.20 Å. The Np(5)-Te(2) bond length is 3.37 Å. The Np(5)-Te(3) bond length is 3.19 Å. The Np(5)-Te(4) bond length is 3.19 Å. The Np(5)-Te(5) bond length is 3.37 Å. The Np(5)-Te(6) bond length is 3.19 Å. The Np(5)-Te(7) bond length is 3.41 Å. The Np(5)-Te(8) bond length is 3.40 Å. In the sixth Np site, Np(6) is bonded to one Te(1), one Te(2), one Te(3), one Te(4), one Te(5), one Te(6), one Te(7), and one Te(8) atom to form a mixture of distorted edge, corner, and face-sharing NpTe8 hexagonal bipyramids. The Np(6)-Te(1) bond length is 3.37 Å. The Np(6)-Te(2) bond length is 3.21 Å. The Np(6)-Te(3) bond length is 3.20 Å. The Np(6)-Te(4) bond length is 3.40 Å. The Np(6)-Te(5) bond length is 3.36 Å. The Np(6)-Te(6) bond length is 3.20 Å. The Np(6)-Te(7) bond length is 3.40 Å. The Np(6)-Te(8) bond length is 3.20 Å. There are eight inequivalent Te sites. In the first Te site, Te(1) is bonded to one Np(1), one Np(2), one Np(3), one Np(4), one Np(5), and one Np(6) atom to form a mixture of distorted edge, corner, and face-sharing TeNp6 octahedra. The corner-sharing octahedral tilt angles range from 17-50°. In the second Te site, Te(2) is bonded to one Np(1), one Np(2), one Np(3), one Np(4), one Np(5), and one Np(6) atom to form a mixture of distorted edge, corner, and face-sharing TeNp6 octahedra. The corner-sharing octahedral tilt angles range from 16-50°. In the third Te site, Te(3) is bonded to one Np(1), one Np(2), one Np(3), one Np(4), one Np(5), and one Np(6) atom to form a mixture of distorted edge, corner, and face-sharing TeNp6 octahedra. The corner-sharing octahedral tilt angles range from 18-50°. In the fourth Te site, Te(4) is bonded to one Np(1), one Np(2), one Np(3), one Np(4), one Np(5), and one Np(6) atom to form a mixture of distorted edge, corner, and face-sharing TeNp6 octahedra. The corner-sharing octahedral tilt angles range from 16-51°. In the fifth Te site, Te(5) is bonded to one Np(1), one Np(2), one Np(3), one Np(4), one Np(5), and one Np(6) atom to form a mixture of distorted edge, corner, and face-sharing TeNp6 octahedra. The corner-sharing octahedral tilt angles range from 16-50°. In the sixth Te site, Te(6) is bonded to one Np(1), one Np(2), one Np(3), one Np(4), one Np(5), and one Np(6) atom to form a mixture of distorted edge, corner, and face-sharing TeNp6 octahedra. The corner-sharing octahedral tilt angles range from 17-51°. In the seventh Te site, Te(7) is bonded to one Np(1), one Np(2), one Np(3), one Np(4), one Np(5), and one Np(6) atom to form a mixture of distorted edge, corner, and face-sharing TeNp6 octahedra. The corner-sharing octahedral tilt angles range from 18-50°. In the eighth Te site, Te(8) is bonded to one Np(1), one Np(2), one Np(3), one Np(4), one Np(5), and one Np(6) atom to form a mixture of distorted edge, corner, and face-sharing TeNp6 octahedra. The corner-sharing octahedral tilt angles range from 16-50°.