Ca(AsO4)2 crystallizes in the triclinic P-1 space group. Ca(1) is bonded in a 6-coordinate geometry to one O(4), one O(7), two equivalent O(1), and two equivalent O(6) atoms. There are two inequivalent As sites. In the first As site, As(1) is bonded in a distorted tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. In the second As site, As(2) is bonded in a trigonal pyramidal geometry to one O(5), one O(6), one O(7), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to two equivalent Ca(1) and one As(1) atom. In the second O site, O(2) is bonded in a distorted water-like geometry to one As(1) and one O(4) atom. In the third O site, O(3) is bonded in a single-bond geometry to one As(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Ca(1), one As(1), and one O(2) atom. In the fifth O site, O(5) is bonded in a distorted water-like geometry to one As(2) and one O(5) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to two equivalent Ca(1) and one As(2) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one Ca(1) and one As(2) atom. In the eighth O site, O(8) is bonded in a single-bond geometry to one As(2) atom.
Ca(AsO4)2 crystallizes in the triclinic P-1 space group. Ca(1) is bonded in a 6-coordinate geometry to one O(4), one O(7), two equivalent O(1), and two equivalent O(6) atoms. The Ca(1)-O(4) bond length is 2.78 Å. The Ca(1)-O(7) bond length is 2.25 Å. There is one shorter (2.42 Å) and one longer (2.47 Å) Ca(1)-O(1) bond length. There is one shorter (2.39 Å) and one longer (2.40 Å) Ca(1)-O(6) bond length. There are two inequivalent As sites. In the first As site, As(1) is bonded in a distorted tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. The As(1)-O(1) bond length is 1.71 Å. The As(1)-O(2) bond length is 1.86 Å. The As(1)-O(3) bond length is 1.64 Å. The As(1)-O(4) bond length is 1.87 Å. In the second As site, As(2) is bonded in a trigonal pyramidal geometry to one O(5), one O(6), one O(7), and one O(8) atom. The As(2)-O(5) bond length is 2.10 Å. The As(2)-O(6) bond length is 1.70 Å. The As(2)-O(7) bond length is 1.65 Å. The As(2)-O(8) bond length is 1.70 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to two equivalent Ca(1) and one As(1) atom. In the second O site, O(2) is bonded in a distorted water-like geometry to one As(1) and one O(4) atom. The O(2)-O(4) bond length is 1.47 Å. In the third O site, O(3) is bonded in a single-bond geometry to one As(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Ca(1), one As(1), and one O(2) atom. In the fifth O site, O(5) is bonded in a distorted water-like geometry to one As(2) and one O(5) atom. The O(5)-O(5) bond length is 1.32 Å. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to two equivalent Ca(1) and one As(2) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one Ca(1) and one As(2) atom. In the eighth O site, O(8) is bonded in a single-bond geometry to one As(2) atom.