WIr4 crystallizes in the trigonal R-3m space group. W(1) is bonded to six equivalent W(1) and six equivalent Ir(1) atoms to form WIr6W6 cuboctahedra that share corners with six equivalent W(1)Ir6W6 cuboctahedra; corners with six Ir(2,2)Ir12 cuboctahedra; edges with six equivalent W(1)Ir6W6 cuboctahedra; edges with six Ir(2,2)Ir12 cuboctahedra; edges with twelve equivalent Ir(1)Ir9W3 cuboctahedra; faces with six equivalent W(1)Ir6W6 cuboctahedra; and faces with twelve equivalent Ir(1)Ir9W3 cuboctahedra. There are six inequivalent Ir sites. In the first Ir site, Ir(1) is bonded to three equivalent W(1), three equivalent Ir(2), and six equivalent Ir(1) atoms to form IrIr9W3 cuboctahedra that share corners with three equivalent Ir(2)Ir12 cuboctahedra; corners with nine equivalent Ir(1)Ir9W3 cuboctahedra; edges with six equivalent W(1)Ir6W6 cuboctahedra; edges with nine Ir(2,2)Ir12 cuboctahedra; edges with nine equivalent Ir(1)Ir9W3 cuboctahedra; faces with six equivalent W(1)Ir6W6 cuboctahedra; faces with six equivalent Ir(2)Ir12 cuboctahedra; and faces with six equivalent Ir(1)Ir9W3 cuboctahedra. In the second Ir site, Ir(2) is bonded to three equivalent Ir(1) and nine Ir(2,2) atoms to form IrIr12 cuboctahedra that share corners with three equivalent W(1)Ir6W6 cuboctahedra; corners with three equivalent Ir(1)Ir9W3 cuboctahedra; corners with six equivalent Ir(2)Ir12 cuboctahedra; edges with three equivalent W(1)Ir6W6 cuboctahedra; edges with nine equivalent Ir(1)Ir9W3 cuboctahedra; edges with twelve Ir(2,2)Ir12 cuboctahedra; faces with six equivalent Ir(1)Ir9W3 cuboctahedra; and faces with twelve Ir(2,2)Ir12 cuboctahedra. In the third Ir site, Ir(2) is bonded to three equivalent Ir(1) and nine Ir(2,2) atoms to form IrIr12 cuboctahedra that share corners with three equivalent W(1)Ir6W6 cuboctahedra; corners with three equivalent Ir(1)Ir9W3 cuboctahedra; corners with six equivalent Ir(2)Ir12 cuboctahedra; edges with three equivalent W(1)Ir6W6 cuboctahedra; edges with nine equivalent Ir(1)Ir9W3 cuboctahedra; edges with twelve Ir(2,2)Ir12 cuboctahedra; faces with six equivalent Ir(1)Ir9W3 cuboctahedra; and faces with twelve Ir(2,2)Ir12 cuboctahedra. In the fourth Ir site, Ir(2) is bonded to three equivalent Ir(1) and nine Ir(2,2) atoms to form IrIr12 cuboctahedra that share corners with three equivalent W(1)Ir6W6 cuboctahedra; corners with three equivalent Ir(1)Ir9W3 cuboctahedra; corners with six equivalent Ir(2)Ir12 cuboctahedra; edges with three equivalent W(1)Ir6W6 cuboctahedra; edges with nine equivalent Ir(1)Ir9W3 cuboctahedra; edges with twelve Ir(2,2)Ir12 cuboctahedra; faces with six equivalent Ir(1)Ir9W3 cuboctahedra; and faces with twelve Ir(2,2)Ir12 cuboctahedra. In the fifth Ir site, Ir(2) is bonded to three equivalent Ir(1) and nine Ir(2,2) atoms to form IrIr12 cuboctahedra that share corners with three equivalent W(1)Ir6W6 cuboctahedra; corners with three equivalent Ir(1)Ir9W3 cuboctahedra; corners with six equivalent Ir(2)Ir12 cuboctahedra; edges with three equivalent W(1)Ir6W6 cuboctahedra; edges with nine equivalent Ir(1)Ir9W3 cuboctahedra; edges with twelve Ir(2,2)Ir12 cuboctahedra; faces with six equivalent Ir(1)Ir9W3 cuboctahedra; and faces with twelve Ir(2,2)Ir12 cuboctahedra. In the sixth Ir site, Ir(2) is bonded to three equivalent Ir(1) and nine Ir(2,2) atoms to form IrIr12 cuboctahedra that share corners with three equivalent W(1)Ir6W6 cuboctahedra; corners with three equivalent Ir(1)Ir9W3 cuboctahedra; corners with six equivalent Ir(2)Ir12 cuboctahedra; edges with three equivalent W(1)Ir6W6 cuboctahedra; edges with nine equivalent Ir(1)Ir9W3 cuboctahedra; edges with twelve Ir(2,2)Ir12 cuboctahedra; faces with six equivalent Ir(1)Ir9W3 cuboctahedra; and faces with twelve Ir(2,2)Ir12 cuboctahedra.
WIr4 crystallizes in the trigonal R-3m space group. W(1) is bonded to six equivalent W(1) and six equivalent Ir(1) atoms to form WIr6W6 cuboctahedra that share corners with six equivalent W(1)Ir6W6 cuboctahedra; corners with six Ir(2,2)Ir12 cuboctahedra; edges with six equivalent W(1)Ir6W6 cuboctahedra; edges with six Ir(2,2)Ir12 cuboctahedra; edges with twelve equivalent Ir(1)Ir9W3 cuboctahedra; faces with six equivalent W(1)Ir6W6 cuboctahedra; and faces with twelve equivalent Ir(1)Ir9W3 cuboctahedra. All W(1)-W(1) bond lengths are 2.76 Å. All W(1)-Ir(1) bond lengths are 2.76 Å. There are six inequivalent Ir sites. In the first Ir site, Ir(1) is bonded to three equivalent W(1), three equivalent Ir(2), and six equivalent Ir(1) atoms to form IrIr9W3 cuboctahedra that share corners with three equivalent Ir(2)Ir12 cuboctahedra; corners with nine equivalent Ir(1)Ir9W3 cuboctahedra; edges with six equivalent W(1)Ir6W6 cuboctahedra; edges with nine Ir(2,2)Ir12 cuboctahedra; edges with nine equivalent Ir(1)Ir9W3 cuboctahedra; faces with six equivalent W(1)Ir6W6 cuboctahedra; faces with six equivalent Ir(2)Ir12 cuboctahedra; and faces with six equivalent Ir(1)Ir9W3 cuboctahedra. All Ir(1)-Ir(2) bond lengths are 2.80 Å. All Ir(1)-Ir(1) bond lengths are 2.76 Å. In the second Ir site, Ir(2) is bonded to three equivalent Ir(1) and nine Ir(2,2) atoms to form IrIr12 cuboctahedra that share corners with three equivalent W(1)Ir6W6 cuboctahedra; corners with three equivalent Ir(1)Ir9W3 cuboctahedra; corners with six equivalent Ir(2)Ir12 cuboctahedra; edges with three equivalent W(1)Ir6W6 cuboctahedra; edges with nine equivalent Ir(1)Ir9W3 cuboctahedra; edges with twelve Ir(2,2)Ir12 cuboctahedra; faces with six equivalent Ir(1)Ir9W3 cuboctahedra; and faces with twelve Ir(2,2)Ir12 cuboctahedra. There are three shorter (2.72 Å) and six longer (2.76 Å) Ir(2)-Ir(2,2) bond lengths. In the third Ir site, Ir(2) is bonded to three equivalent Ir(1) and nine Ir(2,2) atoms to form IrIr12 cuboctahedra that share corners with three equivalent W(1)Ir6W6 cuboctahedra; corners with three equivalent Ir(1)Ir9W3 cuboctahedra; corners with six equivalent Ir(2)Ir12 cuboctahedra; edges with three equivalent W(1)Ir6W6 cuboctahedra; edges with nine equivalent Ir(1)Ir9W3 cuboctahedra; edges with twelve Ir(2,2)Ir12 cuboctahedra; faces with six equivalent Ir(1)Ir9W3 cuboctahedra; and faces with twelve Ir(2,2)Ir12 cuboctahedra. All Ir(2)-Ir(1) bond lengths are 2.80 Å. All Ir(2)-Ir(2) bond lengths are 2.76 Å. In the fourth Ir site, Ir(2) is bonded to three equivalent Ir(1) and nine Ir(2,2) atoms to form IrIr12 cuboctahedra that share corners with three equivalent W(1)Ir6W6 cuboctahedra; corners with three equivalent Ir(1)Ir9W3 cuboctahedra; corners with six equivalent Ir(2)Ir12 cuboctahedra; edges with three equivalent W(1)Ir6W6 cuboctahedra; edges with nine equivalent Ir(1)Ir9W3 cuboctahedra; edges with twelve Ir(2,2)Ir12 cuboctahedra; faces with six equivalent Ir(1)Ir9W3 cuboctahedra; and faces with twelve Ir(2,2)Ir12 cuboctahedra. All Ir(2)-Ir(1) bond lengths are 2.80 Å. There are three shorter (2.72 Å) and six longer (2.76 Å) Ir(2)-Ir(2,2) bond lengths. In the fifth Ir site, Ir(2) is bonded to three equivalent Ir(1) and nine Ir(2,2) atoms to form IrIr12 cuboctahedra that share corners with three equivalent W(1)Ir6W6 cuboctahedra; corners with three equivalent Ir(1)Ir9W3 cuboctahedra; corners with six equivalent Ir(2)Ir12 cuboctahedra; edges with three equivalent W(1)Ir6W6 cuboctahedra; edges with nine equivalent Ir(1)Ir9W3 cuboctahedra; edges with twelve Ir(2,2)Ir12 cuboctahedra; faces with six equivalent Ir(1)Ir9W3 cuboctahedra; and faces with twelve Ir(2,2)Ir12 cuboctahedra. All Ir(2)-Ir(1) bond lengths are 2.80 Å. There are three shorter (2.72 Å) and six longer (2.76 Å) Ir(2)-Ir(2,2) bond lengths. In the sixth Ir site, Ir(2) is bonded to three equivalent Ir(1) and nine Ir(2,2) atoms to form IrIr12 cuboctahedra that share corners with three equivalent W(1)Ir6W6 cuboctahedra; corners with three equivalent Ir(1)Ir9W3 cuboctahedra; corners with six equivalent Ir(2)Ir12 cuboctahedra; edges with three equivalent W(1)Ir6W6 cuboctahedra; edges with nine equivalent Ir(1)Ir9W3 cuboctahedra; edges with twelve Ir(2,2)Ir12 cuboctahedra; faces with six equivalent Ir(1)Ir9W3 cuboctahedra; and faces with twelve Ir(2,2)Ir12 cuboctahedra. All Ir(2)-Ir(1) bond lengths are 2.80 Å. All Ir(2)-Ir(2) bond lengths are 2.76 Å.