NaAc crystallizes in the hexagonal P-6m2 space group. Na(1) is bonded to six equivalent Na(1) and six equivalent Ac(1) atoms to form NaNa6Ac6 cuboctahedra that share corners with eighteen equivalent Na(1)Na6Ac6 cuboctahedra, edges with six equivalent Na(1)Na6Ac6 cuboctahedra, edges with twelve equivalent Ac(1)Na6Ac6 cuboctahedra, faces with eight equivalent Na(1)Na6Ac6 cuboctahedra, and faces with twelve equivalent Ac(1)Na6Ac6 cuboctahedra. Ac(1) is bonded to six equivalent Na(1) and six equivalent Ac(1) atoms to form AcNa6Ac6 cuboctahedra that share corners with eighteen equivalent Ac(1)Na6Ac6 cuboctahedra, edges with six equivalent Ac(1)Na6Ac6 cuboctahedra, edges with twelve equivalent Na(1)Na6Ac6 cuboctahedra, faces with eight equivalent Ac(1)Na6Ac6 cuboctahedra, and faces with twelve equivalent Na(1)Na6Ac6 cuboctahedra.
NaAc crystallizes in the hexagonal P-6m2 space group. Na(1) is bonded to six equivalent Na(1) and six equivalent Ac(1) atoms to form NaNa6Ac6 cuboctahedra that share corners with eighteen equivalent Na(1)Na6Ac6 cuboctahedra, edges with six equivalent Na(1)Na6Ac6 cuboctahedra, edges with twelve equivalent Ac(1)Na6Ac6 cuboctahedra, faces with eight equivalent Na(1)Na6Ac6 cuboctahedra, and faces with twelve equivalent Ac(1)Na6Ac6 cuboctahedra. All Na(1)-Na(1) bond lengths are 3.88 Å. All Na(1)-Ac(1) bond lengths are 3.96 Å. Ac(1) is bonded to six equivalent Na(1) and six equivalent Ac(1) atoms to form AcNa6Ac6 cuboctahedra that share corners with eighteen equivalent Ac(1)Na6Ac6 cuboctahedra, edges with six equivalent Ac(1)Na6Ac6 cuboctahedra, edges with twelve equivalent Na(1)Na6Ac6 cuboctahedra, faces with eight equivalent Ac(1)Na6Ac6 cuboctahedra, and faces with twelve equivalent Na(1)Na6Ac6 cuboctahedra. All Ac(1)-Ac(1) bond lengths are 3.88 Å.