Ba2PtAu crystallizes in the orthorhombic Pmc2_1 space group. There are six inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 7-coordinate geometry to one Pt(2), two equivalent Pt(1), two equivalent Au(1), and two equivalent Au(2) atoms. In the second Ba site, Ba(2) is bonded in a 7-coordinate geometry to two equivalent Pt(1), two equivalent Pt(2), one Au(2), and two equivalent Au(1) atoms. In the third Ba site, Ba(3) is bonded in a 7-coordinate geometry to one Pt(2), one Pt(3), two equivalent Pt(1), one Au(1), and two equivalent Au(3) atoms. In the fourth Ba site, Ba(4) is bonded in a 7-coordinate geometry to one Pt(1), two equivalent Pt(3), one Au(2), one Au(3), and two equivalent Au(1) atoms. In the fifth Ba site, Ba(5) is bonded in a 7-coordinate geometry to two equivalent Pt(2), two equivalent Pt(3), one Au(2), and two equivalent Au(3) atoms. In the sixth Ba site, Ba(6) is bonded in a 7-coordinate geometry to one Pt(2), two equivalent Pt(3), two equivalent Au(2), and two equivalent Au(3) atoms. There are three inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 9-coordinate geometry to one Ba(4), two equivalent Ba(1), two equivalent Ba(2), two equivalent Ba(3), and two equivalent Au(1) atoms. In the second Pt site, Pt(2) is bonded in a 9-coordinate geometry to one Ba(1), one Ba(3), one Ba(6), two equivalent Ba(2), two equivalent Ba(5), and two equivalent Au(2) atoms. In the third Pt site, Pt(3) is bonded in a 9-coordinate geometry to one Ba(3), two equivalent Ba(4), two equivalent Ba(5), two equivalent Ba(6), and two equivalent Au(3) atoms. There are three inequivalent Au sites. In the first Au site, Au(1) is bonded in a 9-coordinate geometry to one Ba(3), two equivalent Ba(1), two equivalent Ba(2), two equivalent Ba(4), and two equivalent Pt(1) atoms. In the second Au site, Au(2) is bonded in a 9-coordinate geometry to one Ba(2), one Ba(4), one Ba(5), two equivalent Ba(1), two equivalent Ba(6), and two equivalent Pt(2) atoms. In the third Au site, Au(3) is bonded in a 9-coordinate geometry to one Ba(4), two equivalent Ba(3), two equivalent Ba(5), two equivalent Ba(6), and two equivalent Pt(3) atoms.
Ba2PtAu crystallizes in the orthorhombic Pmc2_1 space group. There are six inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 7-coordinate geometry to one Pt(2), two equivalent Pt(1), two equivalent Au(1), and two equivalent Au(2) atoms. The Ba(1)-Pt(2) bond length is 3.40 Å. Both Ba(1)-Pt(1) bond lengths are 3.34 Å. There is one shorter (3.35 Å) and one longer (3.51 Å) Ba(1)-Au(1) bond length. Both Ba(1)-Au(2) bond lengths are 3.42 Å. In the second Ba site, Ba(2) is bonded in a 7-coordinate geometry to two equivalent Pt(1), two equivalent Pt(2), one Au(2), and two equivalent Au(1) atoms. There is one shorter (3.42 Å) and one longer (3.49 Å) Ba(2)-Pt(1) bond length. Both Ba(2)-Pt(2) bond lengths are 3.35 Å. The Ba(2)-Au(2) bond length is 3.41 Å. Both Ba(2)-Au(1) bond lengths are 3.45 Å. In the third Ba site, Ba(3) is bonded in a 7-coordinate geometry to one Pt(2), one Pt(3), two equivalent Pt(1), one Au(1), and two equivalent Au(3) atoms. The Ba(3)-Pt(2) bond length is 3.41 Å. The Ba(3)-Pt(3) bond length is 3.48 Å. Both Ba(3)-Pt(1) bond lengths are 3.36 Å. The Ba(3)-Au(1) bond length is 3.41 Å. Both Ba(3)-Au(3) bond lengths are 3.45 Å. In the fourth Ba site, Ba(4) is bonded in a 7-coordinate geometry to one Pt(1), two equivalent Pt(3), one Au(2), one Au(3), and two equivalent Au(1) atoms. The Ba(4)-Pt(1) bond length is 3.42 Å. Both Ba(4)-Pt(3) bond lengths are 3.32 Å. The Ba(4)-Au(2) bond length is 3.53 Å. The Ba(4)-Au(3) bond length is 3.35 Å. Both Ba(4)-Au(1) bond lengths are 3.41 Å. In the fifth Ba site, Ba(5) is bonded in a 7-coordinate geometry to two equivalent Pt(2), two equivalent Pt(3), one Au(2), and two equivalent Au(3) atoms. Both Ba(5)-Pt(2) bond lengths are 3.40 Å. Both Ba(5)-Pt(3) bond lengths are 3.38 Å. The Ba(5)-Au(2) bond length is 3.40 Å. There is one shorter (3.39 Å) and one longer (3.47 Å) Ba(5)-Au(3) bond length. In the sixth Ba site, Ba(6) is bonded in a 7-coordinate geometry to one Pt(2), two equivalent Pt(3), two equivalent Au(2), and two equivalent Au(3) atoms. The Ba(6)-Pt(2) bond length is 3.43 Å. There is one shorter (3.43 Å) and one longer (3.46 Å) Ba(6)-Pt(3) bond length. Both Ba(6)-Au(2) bond lengths are 3.39 Å. Both Ba(6)-Au(3) bond lengths are 3.39 Å. There are three inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 9-coordinate geometry to one Ba(4), two equivalent Ba(1), two equivalent Ba(2), two equivalent Ba(3), and two equivalent Au(1) atoms. Both Pt(1)-Au(1) bond lengths are 3.04 Å. In the second Pt site, Pt(2) is bonded in a 9-coordinate geometry to one Ba(1), one Ba(3), one Ba(6), two equivalent Ba(2), two equivalent Ba(5), and two equivalent Au(2) atoms. Both Pt(2)-Au(2) bond lengths are 3.03 Å. In the third Pt site, Pt(3) is bonded in a 9-coordinate geometry to one Ba(3), two equivalent Ba(4), two equivalent Ba(5), two equivalent Ba(6), and two equivalent Au(3) atoms. Both Pt(3)-Au(3) bond lengths are 3.03 Å. There are three inequivalent Au sites. In the first Au site, Au(1) is bonded in a 9-coordinate geometry to one Ba(3), two equivalent Ba(1), two equivalent Ba(2), two equivalent Ba(4), and two equivalent Pt(1) atoms. In the second Au site, Au(2) is bonded in a 9-coordinate geometry to one Ba(2), one Ba(4), one Ba(5), two equivalent Ba(1), two equivalent Ba(6), and two equivalent Pt(2) atoms. In the third Au site, Au(3) is bonded in a 9-coordinate geometry to one Ba(4), two equivalent Ba(3), two equivalent Ba(5), two equivalent Ba(6), and two equivalent Pt(3) atoms.