KPm3 is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. K(1) is bonded to four equivalent Pm(2) and eight equivalent Pm(1) atoms to form KPm12 cuboctahedra that share corners with four equivalent K(1)Pm12 cuboctahedra, corners with eight equivalent Pm(2)K4Pm8 cuboctahedra, edges with eight equivalent K(1)Pm12 cuboctahedra, edges with sixteen equivalent Pm(1)K4Pm8 cuboctahedra, faces with four equivalent K(1)Pm12 cuboctahedra, faces with six equivalent Pm(2)K4Pm8 cuboctahedra, and faces with eight equivalent Pm(1)K4Pm8 cuboctahedra. There are two inequivalent Pm sites. In the first Pm site, Pm(1) is bonded to four equivalent K(1), four equivalent Pm(1), and four equivalent Pm(2) atoms to form PmK4Pm8 cuboctahedra that share corners with twelve equivalent Pm(1)K4Pm8 cuboctahedra, edges with eight equivalent K(1)Pm12 cuboctahedra, edges with eight equivalent Pm(1)K4Pm8 cuboctahedra, edges with eight equivalent Pm(2)K4Pm8 cuboctahedra, faces with four equivalent K(1)Pm12 cuboctahedra, faces with four equivalent Pm(2)K4Pm8 cuboctahedra, and faces with ten equivalent Pm(1)K4Pm8 cuboctahedra. In the second Pm site, Pm(2) is bonded to four equivalent K(1) and eight equivalent Pm(1) atoms to form distorted PmK4Pm8 cuboctahedra that share corners with four equivalent Pm(2)K4Pm8 cuboctahedra, corners with eight equivalent K(1)Pm12 cuboctahedra, edges with eight equivalent Pm(2)K4Pm8 cuboctahedra, edges with sixteen equivalent Pm(1)K4Pm8 cuboctahedra, faces with four equivalent Pm(2)K4Pm8 cuboctahedra, faces with six equivalent K(1)Pm12 cuboctahedra, and faces with eight equivalent Pm(1)K4Pm8 cuboctahedra.
KPm3 is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. K(1) is bonded to four equivalent Pm(2) and eight equivalent Pm(1) atoms to form KPm12 cuboctahedra that share corners with four equivalent K(1)Pm12 cuboctahedra, corners with eight equivalent Pm(2)K4Pm8 cuboctahedra, edges with eight equivalent K(1)Pm12 cuboctahedra, edges with sixteen equivalent Pm(1)K4Pm8 cuboctahedra, faces with four equivalent K(1)Pm12 cuboctahedra, faces with six equivalent Pm(2)K4Pm8 cuboctahedra, and faces with eight equivalent Pm(1)K4Pm8 cuboctahedra. All K(1)-Pm(2) bond lengths are 3.72 Å. All K(1)-Pm(1) bond lengths are 3.81 Å. There are two inequivalent Pm sites. In the first Pm site, Pm(1) is bonded to four equivalent K(1), four equivalent Pm(1), and four equivalent Pm(2) atoms to form PmK4Pm8 cuboctahedra that share corners with twelve equivalent Pm(1)K4Pm8 cuboctahedra, edges with eight equivalent K(1)Pm12 cuboctahedra, edges with eight equivalent Pm(1)K4Pm8 cuboctahedra, edges with eight equivalent Pm(2)K4Pm8 cuboctahedra, faces with four equivalent K(1)Pm12 cuboctahedra, faces with four equivalent Pm(2)K4Pm8 cuboctahedra, and faces with ten equivalent Pm(1)K4Pm8 cuboctahedra. All Pm(1)-Pm(1) bond lengths are 3.72 Å. All Pm(1)-Pm(2) bond lengths are 3.81 Å. In the second Pm site, Pm(2) is bonded to four equivalent K(1) and eight equivalent Pm(1) atoms to form distorted PmK4Pm8 cuboctahedra that share corners with four equivalent Pm(2)K4Pm8 cuboctahedra, corners with eight equivalent K(1)Pm12 cuboctahedra, edges with eight equivalent Pm(2)K4Pm8 cuboctahedra, edges with sixteen equivalent Pm(1)K4Pm8 cuboctahedra, faces with four equivalent Pm(2)K4Pm8 cuboctahedra, faces with six equivalent K(1)Pm12 cuboctahedra, and faces with eight equivalent Pm(1)K4Pm8 cuboctahedra.