SrAc3 is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Sr(1) is bonded to twelve Ac(1,1) atoms to form SrAc12 cuboctahedra that share corners with six equivalent Sr(1)Ac12 cuboctahedra; corners with twelve equivalent Ac(1)Sr4Ac8 cuboctahedra; edges with eighteen Ac(1,1)Sr4Ac8 cuboctahedra; faces with eight equivalent Sr(1)Ac12 cuboctahedra; and faces with twelve Ac(1,1)Sr4Ac8 cuboctahedra. There are two inequivalent Ac sites. In the first Ac site, Ac(1) is bonded to four equivalent Sr(1) and eight Ac(1,1) atoms to form AcSr4Ac8 cuboctahedra that share corners with four equivalent Sr(1)Ac12 cuboctahedra; corners with fourteen Ac(1,1)Sr4Ac8 cuboctahedra; edges with six equivalent Sr(1)Ac12 cuboctahedra; edges with twelve Ac(1,1)Sr4Ac8 cuboctahedra; faces with four equivalent Sr(1)Ac12 cuboctahedra; and faces with sixteen Ac(1,1)Sr4Ac8 cuboctahedra. In the second Ac site, Ac(1) is bonded to four equivalent Sr(1) and eight equivalent Ac(1) atoms to form AcSr4Ac8 cuboctahedra that share corners with four equivalent Sr(1)Ac12 cuboctahedra; corners with fourteen Ac(1,1)Sr4Ac8 cuboctahedra; edges with six equivalent Sr(1)Ac12 cuboctahedra; edges with twelve equivalent Ac(1)Sr4Ac8 cuboctahedra; faces with four equivalent Sr(1)Ac12 cuboctahedra; and faces with sixteen Ac(1,1)Sr4Ac8 cuboctahedra.
SrAc3 is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Sr(1) is bonded to twelve Ac(1,1) atoms to form SrAc12 cuboctahedra that share corners with six equivalent Sr(1)Ac12 cuboctahedra; corners with twelve equivalent Ac(1)Sr4Ac8 cuboctahedra; edges with eighteen Ac(1,1)Sr4Ac8 cuboctahedra; faces with eight equivalent Sr(1)Ac12 cuboctahedra; and faces with twelve Ac(1,1)Sr4Ac8 cuboctahedra. There are six shorter (4.05 Å) and six longer (4.07 Å) Sr(1)-Ac(1,1) bond lengths. There are two inequivalent Ac sites. In the first Ac site, Ac(1) is bonded to four equivalent Sr(1) and eight Ac(1,1) atoms to form AcSr4Ac8 cuboctahedra that share corners with four equivalent Sr(1)Ac12 cuboctahedra; corners with fourteen Ac(1,1)Sr4Ac8 cuboctahedra; edges with six equivalent Sr(1)Ac12 cuboctahedra; edges with twelve Ac(1,1)Sr4Ac8 cuboctahedra; faces with four equivalent Sr(1)Ac12 cuboctahedra; and faces with sixteen Ac(1,1)Sr4Ac8 cuboctahedra. There are six shorter (4.01 Å) and two longer (4.14 Å) Ac(1)-Ac(1,1) bond lengths. In the second Ac site, Ac(1) is bonded to four equivalent Sr(1) and eight equivalent Ac(1) atoms to form AcSr4Ac8 cuboctahedra that share corners with four equivalent Sr(1)Ac12 cuboctahedra; corners with fourteen Ac(1,1)Sr4Ac8 cuboctahedra; edges with six equivalent Sr(1)Ac12 cuboctahedra; edges with twelve equivalent Ac(1)Sr4Ac8 cuboctahedra; faces with four equivalent Sr(1)Ac12 cuboctahedra; and faces with sixteen Ac(1,1)Sr4Ac8 cuboctahedra.