Cu4Ti crystallizes in the orthorhombic Pnma space group. Ti(1) is bonded to two equivalent Cu(4), three equivalent Cu(2), three equivalent Cu(3), and four equivalent Cu(1) atoms to form TiCu12 cuboctahedra that share  a cornercorner with one Cu(4)Ti2Cu10 cuboctahedra, corners with four equivalent Cu(3)Ti3Cu9 cuboctahedra, corners with five equivalent Cu(1)Ti4Cu8 cuboctahedra, corners with eight equivalent Cu(2)Ti3Cu9 cuboctahedra, edges with two equivalent Cu(2)Ti3Cu9 cuboctahedra, edges with two equivalent Cu(3)Ti3Cu9 cuboctahedra, edges with two equivalent Cu(1)Ti4Cu8 cuboctahedra, edges with six equivalent Ti(1)Cu12 cuboctahedra, edges with six equivalent Cu(4)Ti2Cu10 cuboctahedra, faces with three equivalent Cu(2)Ti3Cu9 cuboctahedra, faces with four equivalent Ti(1)Cu12 cuboctahedra, faces with four equivalent Cu(4)Ti2Cu10 cuboctahedra, faces with four equivalent Cu(1)Ti4Cu8 cuboctahedra, and faces with five equivalent Cu(3)Ti3Cu9 cuboctahedra. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to four equivalent Ti(1), one Cu(2), one Cu(4), two equivalent Cu(1), and four equivalent Cu(3) atoms to form distorted CuTi4Cu8 cuboctahedra that share corners with four equivalent Cu(4)Ti2Cu10 cuboctahedra, corners with four equivalent Cu(2)Ti3Cu9 cuboctahedra, corners with five equivalent Ti(1)Cu12 cuboctahedra, corners with five equivalent Cu(3)Ti3Cu9 cuboctahedra, edges with two equivalent Ti(1)Cu12 cuboctahedra, edges with two equivalent Cu(3)Ti3Cu9 cuboctahedra, edges with two equivalent Cu(1)Ti4Cu8 cuboctahedra, edges with six equivalent Cu(4)Ti2Cu10 cuboctahedra, edges with six equivalent Cu(2)Ti3Cu9 cuboctahedra, faces with three equivalent Cu(4)Ti2Cu10 cuboctahedra, faces with three equivalent Cu(2)Ti3Cu9 cuboctahedra, faces with four equivalent Ti(1)Cu12 cuboctahedra, faces with four equivalent Cu(3)Ti3Cu9 cuboctahedra, and faces with six equivalent Cu(1)Ti4Cu8 cuboctahedra. In the second Cu site, Cu(2) is bonded to three equivalent Ti(1), one Cu(1), two equivalent Cu(2), two equivalent Cu(3), and four equivalent Cu(4) atoms to form distorted CuTi3Cu9 cuboctahedra that share  a cornercorner with one Cu(4)Ti2Cu10 cuboctahedra,  a cornercorner with one Cu(3)Ti3Cu9 cuboctahedra, corners with four equivalent Cu(2)Ti3Cu9 cuboctahedra, corners with four equivalent Cu(1)Ti4Cu8 cuboctahedra, corners with eight equivalent Ti(1)Cu12 cuboctahedra, edges with two equivalent Ti(1)Cu12 cuboctahedra, edges with two equivalent Cu(4)Ti2Cu10 cuboctahedra, edges with two equivalent Cu(2)Ti3Cu9 cuboctahedra, edges with six equivalent Cu(3)Ti3Cu9 cuboctahedra, edges with six equivalent Cu(1)Ti4Cu8 cuboctahedra, faces with three equivalent Ti(1)Cu12 cuboctahedra, faces with three equivalent Cu(1)Ti4Cu8 cuboctahedra, faces with four equivalent Cu(2)Ti3Cu9 cuboctahedra, faces with four equivalent Cu(3)Ti3Cu9 cuboctahedra, and faces with six equivalent Cu(4)Ti2Cu10 cuboctahedra. In the third Cu site, Cu(3) is bonded to three equivalent Ti(1), two equivalent Cu(2), three equivalent Cu(4), and four equivalent Cu(1) atoms to form distorted CuTi3Cu9 cuboctahedra that share  a cornercorner with one Cu(2)Ti3Cu9 cuboctahedra, corners with four equivalent Ti(1)Cu12 cuboctahedra, corners with five equivalent Cu(1)Ti4Cu8 cuboctahedra, corners with eight equivalent Cu(4)Ti2Cu10 cuboctahedra, edges with two equivalent Ti(1)Cu12 cuboctahedra, edges with two equivalent Cu(4)Ti2Cu10 cuboctahedra, edges with two equivalent Cu(1)Ti4Cu8 cuboctahedra, edges with six equivalent Cu(2)Ti3Cu9 cuboctahedra, edges with six equivalent Cu(3)Ti3Cu9 cuboctahedra, faces with three equivalent Cu(4)Ti2Cu10 cuboctahedra, faces with four equivalent Cu(2)Ti3Cu9 cuboctahedra, faces with four equivalent Cu(3)Ti3Cu9 cuboctahedra, faces with four equivalent Cu(1)Ti4Cu8 cuboctahedra, and faces with five equivalent Ti(1)Cu12 cuboctahedra. In the fourth Cu site, Cu(4) is bonded to two equivalent Ti(1), one Cu(1), two equivalent Cu(4), three equivalent Cu(3), and four equivalent Cu(2) atoms to form CuTi2Cu10 cuboctahedra that share  a cornercorner with one Ti(1)Cu12 cuboctahedra,  a cornercorner with one Cu(2)Ti3Cu9 cuboctahedra, corners with four equivalent Cu(4)Ti2Cu10 cuboctahedra, corners with four equivalent Cu(1)Ti4Cu8 cuboctahedra, corners with eight equivalent Cu(3)Ti3Cu9 cuboctahedra, edges with two equivalent Cu(4)Ti2Cu10 cuboctahedra, edges with two equivalent Cu(2)Ti3Cu9 cuboctahedra, edges with two equivalent Cu(3)Ti3Cu9 cuboctahedra, edges with six equivalent Ti(1)Cu12 cuboctahedra, edges with six equivalent Cu(1)Ti4Cu8 cuboctahedra, faces with three equivalent Cu(3)Ti3Cu9 cuboctahedra, faces with three equivalent Cu(1)Ti4Cu8 cuboctahedra, faces with four equivalent Ti(1)Cu12 cuboctahedra, faces with four equivalent Cu(4)Ti2Cu10 cuboctahedra, and faces with six equivalent Cu(2)Ti3Cu9 cuboctahedra.
Cu4Ti crystallizes in the orthorhombic Pnma space group. Ti(1) is bonded to two equivalent Cu(4), three equivalent Cu(2), three equivalent Cu(3), and four equivalent Cu(1) atoms to form TiCu12 cuboctahedra that share  a cornercorner with one Cu(4)Ti2Cu10 cuboctahedra, corners with four equivalent Cu(3)Ti3Cu9 cuboctahedra, corners with five equivalent Cu(1)Ti4Cu8 cuboctahedra, corners with eight equivalent Cu(2)Ti3Cu9 cuboctahedra, edges with two equivalent Cu(2)Ti3Cu9 cuboctahedra, edges with two equivalent Cu(3)Ti3Cu9 cuboctahedra, edges with two equivalent Cu(1)Ti4Cu8 cuboctahedra, edges with six equivalent Ti(1)Cu12 cuboctahedra, edges with six equivalent Cu(4)Ti2Cu10 cuboctahedra, faces with three equivalent Cu(2)Ti3Cu9 cuboctahedra, faces with four equivalent Ti(1)Cu12 cuboctahedra, faces with four equivalent Cu(4)Ti2Cu10 cuboctahedra, faces with four equivalent Cu(1)Ti4Cu8 cuboctahedra, and faces with five equivalent Cu(3)Ti3Cu9 cuboctahedra. Both Ti(1)-Cu(4) bond lengths are 2.65 Å. All Ti(1)-Cu(2) bond lengths are 2.60 Å. There is one shorter (2.59 Å) and two longer (2.62 Å) Ti(1)-Cu(3) bond lengths. There are a spread of Ti(1)-Cu(1) bond distances ranging from 2.56-2.60 Å. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to four equivalent Ti(1), one Cu(2), one Cu(4), two equivalent Cu(1), and four equivalent Cu(3) atoms to form distorted CuTi4Cu8 cuboctahedra that share corners with four equivalent Cu(4)Ti2Cu10 cuboctahedra, corners with four equivalent Cu(2)Ti3Cu9 cuboctahedra, corners with five equivalent Ti(1)Cu12 cuboctahedra, corners with five equivalent Cu(3)Ti3Cu9 cuboctahedra, edges with two equivalent Ti(1)Cu12 cuboctahedra, edges with two equivalent Cu(3)Ti3Cu9 cuboctahedra, edges with two equivalent Cu(1)Ti4Cu8 cuboctahedra, edges with six equivalent Cu(4)Ti2Cu10 cuboctahedra, edges with six equivalent Cu(2)Ti3Cu9 cuboctahedra, faces with three equivalent Cu(4)Ti2Cu10 cuboctahedra, faces with three equivalent Cu(2)Ti3Cu9 cuboctahedra, faces with four equivalent Ti(1)Cu12 cuboctahedra, faces with four equivalent Cu(3)Ti3Cu9 cuboctahedra, and faces with six equivalent Cu(1)Ti4Cu8 cuboctahedra. The Cu(1)-Cu(2) bond length is 2.61 Å. The Cu(1)-Cu(4) bond length is 2.56 Å. Both Cu(1)-Cu(1) bond lengths are 2.59 Å. There are a spread of Cu(1)-Cu(3) bond distances ranging from 2.52-2.66 Å. In the second Cu site, Cu(2) is bonded to three equivalent Ti(1), one Cu(1), two equivalent Cu(2), two equivalent Cu(3), and four equivalent Cu(4) atoms to form distorted CuTi3Cu9 cuboctahedra that share  a cornercorner with one Cu(4)Ti2Cu10 cuboctahedra,  a cornercorner with one Cu(3)Ti3Cu9 cuboctahedra, corners with four equivalent Cu(2)Ti3Cu9 cuboctahedra, corners with four equivalent Cu(1)Ti4Cu8 cuboctahedra, corners with eight equivalent Ti(1)Cu12 cuboctahedra, edges with two equivalent Ti(1)Cu12 cuboctahedra, edges with two equivalent Cu(4)Ti2Cu10 cuboctahedra, edges with two equivalent Cu(2)Ti3Cu9 cuboctahedra, edges with six equivalent Cu(3)Ti3Cu9 cuboctahedra, edges with six equivalent Cu(1)Ti4Cu8 cuboctahedra, faces with three equivalent Ti(1)Cu12 cuboctahedra, faces with three equivalent Cu(1)Ti4Cu8 cuboctahedra, faces with four equivalent Cu(2)Ti3Cu9 cuboctahedra, faces with four equivalent Cu(3)Ti3Cu9 cuboctahedra, and faces with six equivalent Cu(4)Ti2Cu10 cuboctahedra. Both Cu(2)-Cu(2) bond lengths are 2.57 Å. Both Cu(2)-Cu(3) bond lengths are 2.58 Å. There are two shorter (2.60 Å) and two longer (2.61 Å) Cu(2)-Cu(4) bond lengths. In the third Cu site, Cu(3) is bonded to three equivalent Ti(1), two equivalent Cu(2), three equivalent Cu(4), and four equivalent Cu(1) atoms to form distorted CuTi3Cu9 cuboctahedra that share  a cornercorner with one Cu(2)Ti3Cu9 cuboctahedra, corners with four equivalent Ti(1)Cu12 cuboctahedra, corners with five equivalent Cu(1)Ti4Cu8 cuboctahedra, corners with eight equivalent Cu(4)Ti2Cu10 cuboctahedra, edges with two equivalent Ti(1)Cu12 cuboctahedra, edges with two equivalent Cu(4)Ti2Cu10 cuboctahedra, edges with two equivalent Cu(1)Ti4Cu8 cuboctahedra, edges with six equivalent Cu(2)Ti3Cu9 cuboctahedra, edges with six equivalent Cu(3)Ti3Cu9 cuboctahedra, faces with three equivalent Cu(4)Ti2Cu10 cuboctahedra, faces with four equivalent Cu(2)Ti3Cu9 cuboctahedra, faces with four equivalent Cu(3)Ti3Cu9 cuboctahedra, faces with four equivalent Cu(1)Ti4Cu8 cuboctahedra, and faces with five equivalent Ti(1)Cu12 cuboctahedra. There are a spread of Cu(3)-Cu(4) bond distances ranging from 2.48-2.58 Å. In the fourth Cu site, Cu(4) is bonded to two equivalent Ti(1), one Cu(1), two equivalent Cu(4), three equivalent Cu(3), and four equivalent Cu(2) atoms to form CuTi2Cu10 cuboctahedra that share  a cornercorner with one Ti(1)Cu12 cuboctahedra,  a cornercorner with one Cu(2)Ti3Cu9 cuboctahedra, corners with four equivalent Cu(4)Ti2Cu10 cuboctahedra, corners with four equivalent Cu(1)Ti4Cu8 cuboctahedra, corners with eight equivalent Cu(3)Ti3Cu9 cuboctahedra, edges with two equivalent Cu(4)Ti2Cu10 cuboctahedra, edges with two equivalent Cu(2)Ti3Cu9 cuboctahedra, edges with two equivalent Cu(3)Ti3Cu9 cuboctahedra, edges with six equivalent Ti(1)Cu12 cuboctahedra, edges with six equivalent Cu(1)Ti4Cu8 cuboctahedra, faces with three equivalent Cu(3)Ti3Cu9 cuboctahedra, faces with three equivalent Cu(1)Ti4Cu8 cuboctahedra, faces with four equivalent Ti(1)Cu12 cuboctahedra, faces with four equivalent Cu(4)Ti2Cu10 cuboctahedra, and faces with six equivalent Cu(2)Ti3Cu9 cuboctahedra. Both Cu(4)-Cu(4) bond lengths are 2.55 Å.