CaMg6Y is Bergman Structure: Mg32(Al,Zn)49 Bergman-like structured and crystallizes in the orthorhombic Amm2 space group. Ca(1) is bonded to two equivalent Mg(2), two equivalent Mg(4), four equivalent Mg(1), and four equivalent Mg(3) atoms to form CaMg12 cuboctahedra that share corners with four equivalent Mg(2)Ca2Y2Mg8 cuboctahedra, corners with six equivalent Ca(1)Mg12 cuboctahedra, edges with two equivalent Mg(2)Ca2Y2Mg8 cuboctahedra, edges with four equivalent Mg(4)Ca2Y2Mg8 cuboctahedra, faces with two equivalent Ca(1)Mg12 cuboctahedra, faces with two equivalent Mg(2)Ca2Y2Mg8 cuboctahedra, faces with two equivalent Mg(4)Ca2Y2Mg8 cuboctahedra, and faces with six equivalent Y(1)Mg12 cuboctahedra. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 11-coordinate geometry to two equivalent Ca(1), one Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), and two equivalent Y(1) atoms. In the second Mg site, Mg(2) is bonded to two equivalent Ca(1), four equivalent Mg(1), four equivalent Mg(3), and two equivalent Y(1) atoms to form MgCa2Y2Mg8 cuboctahedra that share corners with four equivalent Ca(1)Mg12 cuboctahedra, corners with six equivalent Mg(2)Ca2Y2Mg8 cuboctahedra, edges with two equivalent Ca(1)Mg12 cuboctahedra, edges with four equivalent Y(1)Mg12 cuboctahedra, faces with two equivalent Ca(1)Mg12 cuboctahedra, faces with two equivalent Mg(2)Ca2Y2Mg8 cuboctahedra, faces with two equivalent Y(1)Mg12 cuboctahedra, and faces with six equivalent Mg(4)Ca2Y2Mg8 cuboctahedra. In the third Mg site, Mg(3) is bonded in a 11-coordinate geometry to two equivalent Ca(1), one Mg(3), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(4), and two equivalent Y(1) atoms. In the fourth Mg site, Mg(4) is bonded to two equivalent Ca(1), four equivalent Mg(1), four equivalent Mg(3), and two equivalent Y(1) atoms to form distorted MgCa2Y2Mg8 cuboctahedra that share corners with four equivalent Y(1)Mg12 cuboctahedra, corners with six equivalent Mg(4)Ca2Y2Mg8 cuboctahedra, edges with two equivalent Y(1)Mg12 cuboctahedra, edges with four equivalent Ca(1)Mg12 cuboctahedra, faces with two equivalent Ca(1)Mg12 cuboctahedra, faces with two equivalent Mg(4)Ca2Y2Mg8 cuboctahedra, faces with two equivalent Y(1)Mg12 cuboctahedra, and faces with six equivalent Mg(2)Ca2Y2Mg8 cuboctahedra. Y(1) is bonded to two equivalent Mg(2), two equivalent Mg(4), four equivalent Mg(1), and four equivalent Mg(3) atoms to form YMg12 cuboctahedra that share corners with four equivalent Mg(4)Ca2Y2Mg8 cuboctahedra, corners with six equivalent Y(1)Mg12 cuboctahedra, edges with two equivalent Mg(4)Ca2Y2Mg8 cuboctahedra, edges with four equivalent Mg(2)Ca2Y2Mg8 cuboctahedra, faces with two equivalent Mg(2)Ca2Y2Mg8 cuboctahedra, faces with two equivalent Mg(4)Ca2Y2Mg8 cuboctahedra, faces with two equivalent Y(1)Mg12 cuboctahedra, and faces with six equivalent Ca(1)Mg12 cuboctahedra.
CaMg6Y is Bergman Structure: Mg32(Al,Zn)49 Bergman-like structured and crystallizes in the orthorhombic Amm2 space group. Ca(1) is bonded to two equivalent Mg(2), two equivalent Mg(4), four equivalent Mg(1), and four equivalent Mg(3) atoms to form CaMg12 cuboctahedra that share corners with four equivalent Mg(2)Ca2Y2Mg8 cuboctahedra, corners with six equivalent Ca(1)Mg12 cuboctahedra, edges with two equivalent Mg(2)Ca2Y2Mg8 cuboctahedra, edges with four equivalent Mg(4)Ca2Y2Mg8 cuboctahedra, faces with two equivalent Ca(1)Mg12 cuboctahedra, faces with two equivalent Mg(2)Ca2Y2Mg8 cuboctahedra, faces with two equivalent Mg(4)Ca2Y2Mg8 cuboctahedra, and faces with six equivalent Y(1)Mg12 cuboctahedra. Both Ca(1)-Mg(2) bond lengths are 3.48 Å. Both Ca(1)-Mg(4) bond lengths are 3.37 Å. There are two shorter (3.33 Å) and two longer (3.36 Å) Ca(1)-Mg(1) bond lengths. All Ca(1)-Mg(3) bond lengths are 3.31 Å. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 11-coordinate geometry to two equivalent Ca(1), one Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), and two equivalent Y(1) atoms. The Mg(1)-Mg(1) bond length is 3.27 Å. There is one shorter (3.33 Å) and one longer (3.36 Å) Mg(1)-Mg(2) bond length. Both Mg(1)-Mg(3) bond lengths are 3.30 Å. Both Mg(1)-Mg(4) bond lengths are 3.19 Å. Both Mg(1)-Y(1) bond lengths are 3.29 Å. In the second Mg site, Mg(2) is bonded to two equivalent Ca(1), four equivalent Mg(1), four equivalent Mg(3), and two equivalent Y(1) atoms to form MgCa2Y2Mg8 cuboctahedra that share corners with four equivalent Ca(1)Mg12 cuboctahedra, corners with six equivalent Mg(2)Ca2Y2Mg8 cuboctahedra, edges with two equivalent Ca(1)Mg12 cuboctahedra, edges with four equivalent Y(1)Mg12 cuboctahedra, faces with two equivalent Ca(1)Mg12 cuboctahedra, faces with two equivalent Mg(2)Ca2Y2Mg8 cuboctahedra, faces with two equivalent Y(1)Mg12 cuboctahedra, and faces with six equivalent Mg(4)Ca2Y2Mg8 cuboctahedra. All Mg(2)-Mg(3) bond lengths are 3.19 Å. Both Mg(2)-Y(1) bond lengths are 3.32 Å. In the third Mg site, Mg(3) is bonded in a 11-coordinate geometry to two equivalent Ca(1), one Mg(3), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(4), and two equivalent Y(1) atoms. The Mg(3)-Mg(3) bond length is 3.21 Å. There is one shorter (3.24 Å) and one longer (3.45 Å) Mg(3)-Mg(4) bond length. Both Mg(3)-Y(1) bond lengths are 3.35 Å. In the fourth Mg site, Mg(4) is bonded to two equivalent Ca(1), four equivalent Mg(1), four equivalent Mg(3), and two equivalent Y(1) atoms to form distorted MgCa2Y2Mg8 cuboctahedra that share corners with four equivalent Y(1)Mg12 cuboctahedra, corners with six equivalent Mg(4)Ca2Y2Mg8 cuboctahedra, edges with two equivalent Y(1)Mg12 cuboctahedra, edges with four equivalent Ca(1)Mg12 cuboctahedra, faces with two equivalent Ca(1)Mg12 cuboctahedra, faces with two equivalent Mg(4)Ca2Y2Mg8 cuboctahedra, faces with two equivalent Y(1)Mg12 cuboctahedra, and faces with six equivalent Mg(2)Ca2Y2Mg8 cuboctahedra. Both Mg(4)-Y(1) bond lengths are 3.48 Å. Y(1) is bonded to two equivalent Mg(2), two equivalent Mg(4), four equivalent Mg(1), and four equivalent Mg(3) atoms to form YMg12 cuboctahedra that share corners with four equivalent Mg(4)Ca2Y2Mg8 cuboctahedra, corners with six equivalent Y(1)Mg12 cuboctahedra, edges with two equivalent Mg(4)Ca2Y2Mg8 cuboctahedra, edges with four equivalent Mg(2)Ca2Y2Mg8 cuboctahedra, faces with two equivalent Mg(2)Ca2Y2Mg8 cuboctahedra, faces with two equivalent Mg(4)Ca2Y2Mg8 cuboctahedra, faces with two equivalent Y(1)Mg12 cuboctahedra, and faces with six equivalent Ca(1)Mg12 cuboctahedra.