Ca2P3(C8O7)3 crystallizes in the monoclinic Pc space group. There are four inequivalent Ca sites. In the first Ca site, Ca(1) is bonded to one O(1), one O(10), one O(19), one O(2), one O(5), and one O(9) atom to form distorted CaO6 pentagonal pyramids that share corners with two equivalent P(2)CO3 tetrahedra and  an edgeedge with one P(1)CO3 tetrahedra. The Ca(1)-O(1) bond length is 2.46 Å. The Ca(1)-O(10) bond length is 2.30 Å. The Ca(1)-O(19) bond length is 2.52 Å. The Ca(1)-O(2) bond length is 2.42 Å. The Ca(1)-O(5) bond length is 2.34 Å. The Ca(1)-O(9) bond length is 2.27 Å. In the second Ca site, Ca(2) is bonded in a distorted hexagonal planar geometry to one O(1), one O(10), one O(12), one O(2), one O(36), and one O(9) atom. The Ca(2)-O(1) bond length is 2.27 Å. The Ca(2)-O(10) bond length is 2.45 Å. The Ca(2)-O(12) bond length is 2.70 Å. The Ca(2)-O(2) bond length is 2.30 Å. The Ca(2)-O(36) bond length is 2.69 Å. The Ca(2)-O(9) bond length is 2.51 Å. In the third Ca site, Ca(3) is bonded to one O(22), one O(23), one O(26), one O(30), one O(31), and one O(40) atom to form CaO6 pentagonal pyramids that share corners with two equivalent P(5)CO3 tetrahedra, edges with two equivalent Ca(4)O6 pentagonal pyramids, and  an edgeedge with one P(4)CO3 tetrahedra. The Ca(3)-O(22) bond length is 2.52 Å. The Ca(3)-O(23) bond length is 2.40 Å. The Ca(3)-O(26) bond length is 2.55 Å. The Ca(3)-O(30) bond length is 2.36 Å. The Ca(3)-O(31) bond length is 2.31 Å. The Ca(3)-O(40) bond length is 2.71 Å. In the fourth Ca site, Ca(4) is bonded to one O(15), one O(22), one O(23), one O(30), one O(31), and one O(33) atom to form distorted CaO6 pentagonal pyramids that share  a cornercorner with one P(3)CO3 tetrahedra, corners with two equivalent P(4)CO3 tetrahedra, edges with two equivalent Ca(3)O6 pentagonal pyramids, and  an edgeedge with one P(5)CO3 tetrahedra. The Ca(4)-O(15) bond length is 2.49 Å. The Ca(4)-O(22) bond length is 2.38 Å. The Ca(4)-O(23) bond length is 2.26 Å. The Ca(4)-O(30) bond length is 2.59 Å. The Ca(4)-O(31) bond length is 2.58 Å. The Ca(4)-O(33) bond length is 2.46 Å. There are forty-eight inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one C(2), one C(6), and one P(1) atom. The C(1)-C(2) bond length is 1.39 Å. The C(1)-C(6) bond length is 1.40 Å. The C(1)-P(1) bond length is 1.80 Å. In the second C site, C(2) is bonded in a bent 120 degrees geometry to one C(1) and one C(3) atom. The C(2)-C(3) bond length is 1.39 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(2), one C(4), and one C(7) atom. The C(3)-C(4) bond length is 1.41 Å. The C(3)-C(7) bond length is 1.52 Å. In the fourth C site, C(4) is bonded in a bent 120 degrees geometry to one C(3) and one C(5) atom. The C(4)-C(5) bond length is 1.40 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(4), one C(6), and one C(8) atom. The C(5)-C(6) bond length is 1.41 Å. The C(5)-C(8) bond length is 1.52 Å. In the sixth C site, C(6) is bonded in a bent 120 degrees geometry to one C(1) and one C(5) atom. In the seventh C site, C(7) is bonded in a bent 120 degrees geometry to one C(3), one O(4), and one O(5) atom. The C(7)-O(4) bond length is 1.23 Å. The C(7)-O(5) bond length is 1.25 Å. In the eighth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one C(5), one O(6), and one O(7) atom. The C(8)-O(6) bond length is 1.25 Å. The C(8)-O(7) bond length is 1.24 Å. In the ninth C site, C(9) is bonded in a trigonal planar geometry to one C(10), one C(14), and one P(2) atom. The C(9)-C(10) bond length is 1.39 Å. The C(9)-C(14) bond length is 1.40 Å. The C(9)-P(2) bond length is 1.80 Å. In the tenth C site, C(10) is bonded in a bent 120 degrees geometry to one C(11) and one C(9) atom. The C(10)-C(11) bond length is 1.40 Å. In the eleventh C site, C(11) is bonded in a trigonal planar geometry to one C(10), one C(12), and one C(15) atom. The C(11)-C(12) bond length is 1.41 Å. The C(11)-C(15) bond length is 1.51 Å. In the twelfth C site, C(12) is bonded in a bent 120 degrees geometry to one C(11) and one C(13) atom. The C(12)-C(13) bond length is 1.40 Å. In the thirteenth C site, C(13) is bonded in a trigonal planar geometry to one C(12), one C(14), and one C(16) atom. The C(13)-C(14) bond length is 1.40 Å. The C(13)-C(16) bond length is 1.52 Å. In the fourteenth C site, C(14) is bonded in a bent 120 degrees geometry to one C(13) and one C(9) atom. In the fifteenth C site, C(15) is bonded in a distorted bent 120 degrees geometry to one C(11), one O(11), and one O(12) atom. The C(15)-O(11) bond length is 1.25 Å. The C(15)-O(12) bond length is 1.24 Å. In the sixteenth C site, C(16) is bonded in a distorted bent 120 degrees geometry to one C(13), one O(13), and one O(14) atom. The C(16)-O(13) bond length is 1.24 Å. The C(16)-O(14) bond length is 1.25 Å. In the seventeenth C site, C(17) is bonded in a trigonal planar geometry to one C(18), one C(22), and one P(3) atom. The C(17)-C(18) bond length is 1.38 Å. The C(17)-C(22) bond length is 1.41 Å. The C(17)-P(3) bond length is 1.81 Å. In the eighteenth C site, C(18) is bonded in a bent 120 degrees geometry to one C(17) and one C(19) atom. The C(18)-C(19) bond length is 1.39 Å. In the nineteenth C site, C(19) is bonded in a trigonal planar geometry to one C(18), one C(20), and one C(23) atom. The C(19)-C(20) bond length is 1.41 Å. The C(19)-C(23) bond length is 1.52 Å. In the twentieth C site, C(20) is bonded in a bent 120 degrees geometry to one C(19) and one C(21) atom. The C(20)-C(21) bond length is 1.40 Å. In the twenty-first C site, C(21) is bonded in a trigonal planar geometry to one C(20), one C(22), and one C(24) atom. The C(21)-C(22) bond length is 1.40 Å. The C(21)-C(24) bond length is 1.51 Å. In the twenty-second C site, C(22) is bonded in a bent 120 degrees geometry to one C(17) and one C(21) atom. In the twenty-third C site, C(23) is bonded in a distorted bent 120 degrees geometry to one C(19), one O(18), and one O(19) atom. The C(23)-O(18) bond length is 1.24 Å. The C(23)-O(19) bond length is 1.23 Å. In the twenty-fourth C site, C(24) is bonded in a distorted bent 120 degrees geometry to one C(21), one O(20), and one O(21) atom. The C(24)-O(20) bond length is 1.24 Å. The C(24)-O(21) bond length is 1.24 Å. In the twenty-fifth C site, C(25) is bonded in a trigonal non-coplanar geometry to one C(26), one C(30), and one P(4) atom. The C(25)-C(26) bond length is 1.40 Å. The C(25)-C(30) bond length is 1.40 Å. The C(25)-P(4) bond length is 1.81 Å. In the twenty-sixth C site, C(26) is bonded in a bent 120 degrees geometry to one C(25) and one C(27) atom. The C(26)-C(27) bond length is 1.40 Å. In the twenty-seventh C site, C(27) is bonded in a trigonal planar geometry to one C(26), one C(28), and one C(31) atom. The C(27)-C(28) bond length is 1.40 Å. The C(27)-C(31) bond length is 1.51 Å. In the twenty-eighth C site, C(28) is bonded in a bent 120 degrees geometry to one C(27) and one C(29) atom. The C(28)-C(29) bond length is 1.40 Å. In the twenty-ninth C site, C(29) is bonded in a trigonal planar geometry to one C(28), one C(30), and one C(32) atom. The C(29)-C(30) bond length is 1.40 Å. The C(29)-C(32) bond length is 1.52 Å. In the thirtieth C site, C(30) is bonded in a bent 120 degrees geometry to one C(25) and one C(29) atom. In the thirty-first C site, C(31) is bonded in a bent 120 degrees geometry to one C(27), one O(25), and one O(26) atom. The C(31)-O(25) bond length is 1.25 Å. The C(31)-O(26) bond length is 1.24 Å. In the thirty-second C site, C(32) is bonded in a bent 120 degrees geometry to one C(29), one O(27), and one O(28) atom. The C(32)-O(27) bond length is 1.24 Å. The C(32)-O(28) bond length is 1.24 Å. In the thirty-third C site, C(33) is bonded in a trigonal planar geometry to one C(34), one C(38), and one P(5) atom. The C(33)-C(34) bond length is 1.39 Å. The C(33)-C(38) bond length is 1.41 Å. The C(33)-P(5) bond length is 1.81 Å. In the thirty-fourth C site, C(34) is bonded in a bent 120 degrees geometry to one C(33) and one C(35) atom. The C(34)-C(35) bond length is 1.39 Å. In the thirty-fifth C site, C(35) is bonded in a trigonal planar geometry to one C(34), one C(36), and one C(39) atom. The C(35)-C(36) bond length is 1.41 Å. The C(35)-C(39) bond length is 1.52 Å. In the thirty-sixth C site, C(36) is bonded in a bent 120 degrees geometry to one C(35) and one C(37) atom. The C(36)-C(37) bond length is 1.39 Å. In the thirty-seventh C site, C(37) is bonded in a trigonal planar geometry to one C(36), one C(38), and one C(40) atom. The C(37)-C(38) bond length is 1.40 Å. The C(37)-C(40) bond length is 1.52 Å. In the thirty-eighth C site, C(38) is bonded in a bent 120 degrees geometry to one C(33) and one C(37) atom. In the thirty-ninth C site, C(39) is bonded in a distorted bent 120 degrees geometry to one C(35), one O(32), and one O(33) atom. The C(39)-O(32) bond length is 1.23 Å. The C(39)-O(33) bond length is 1.25 Å. In the fortieth C site, C(40) is bonded in a distorted bent 120 degrees geometry to one C(37), one O(34), and one O(35) atom. The C(40)-O(34) bond length is 1.25 Å. The C(40)-O(35) bond length is 1.24 Å. In the forty-first C site, C(41) is bonded in a distorted trigonal planar geometry to one C(42), one C(46), and one P(6) atom. The C(41)-C(42) bond length is 1.41 Å. The C(41)-C(46) bond length is 1.40 Å. The C(41)-P(6) bond length is 1.81 Å. In the forty-second C site, C(42) is bonded in a bent 120 degrees geometry to one C(41) and one C(43) atom. The C(42)-C(43) bond length is 1.42 Å. In the forty-third C site, C(43) is bonded in a trigonal planar geometry to one C(42), one C(44), and one C(47) atom. The C(43)-C(44) bond length is 1.40 Å. The C(43)-C(47) bond length is 1.53 Å. In the forty-fourth C site, C(44) is bonded in a bent 120 degrees geometry to one C(43) and one C(45) atom. The C(44)-C(45) bond length is 1.42 Å. In the forty-fifth C site, C(45) is bonded in a trigonal planar geometry to one C(44), one C(46), and one C(48) atom. The C(45)-C(46) bond length is 1.42 Å. The C(45)-C(48) bond length is 1.52 Å. In the forty-sixth C site, C(46) is bonded in a bent 120 degrees geometry to one C(41) and one C(45) atom. In the forty-seventh C site, C(47) is bonded in a distorted bent 120 degrees geometry to one C(43), one O(39), and one O(40) atom. The C(47)-O(39) bond length is 1.26 Å. The C(47)-O(40) bond length is 1.23 Å. In the forty-eighth C site, C(48) is bonded in a distorted bent 120 degrees geometry to one C(45), one O(41), and one O(42) atom. The C(48)-O(41) bond length is 1.24 Å. The C(48)-O(42) bond length is 1.25 Å. There are six inequivalent P sites. In the first P site, P(1) is bonded to one C(1), one O(1), one O(2), and one O(3) atom to form PCO3 tetrahedra that share  an edgeedge with one Ca(1)O6 pentagonal pyramid. The P(1)-O(1) bond length is 1.54 Å. The P(1)-O(2) bond length is 1.53 Å. The P(1)-O(3) bond length is 1.55 Å. In the second P site, P(2) is bonded to one C(9), one O(10), one O(8), and one O(9) atom to form PCO3 tetrahedra that share corners with two equivalent Ca(1)O6 pentagonal pyramids. The P(2)-O(10) bond length is 1.53 Å. The P(2)-O(8) bond length is 1.55 Å. The P(2)-O(9) bond length is 1.54 Å. In the third P site, P(3) is bonded to one C(17), one O(15), one O(16), and one O(17) atom to form PCO3 tetrahedra that share  a cornercorner with one Ca(4)O6 pentagonal pyramid. The P(3)-O(15) bond length is 1.54 Å. The P(3)-O(16) bond length is 1.55 Å. The P(3)-O(17) bond length is 1.55 Å. In the fourth P site, P(4) is bonded to one C(25), one O(22), one O(23), and one O(24) atom to form PCO3 tetrahedra that share corners with two equivalent Ca(4)O6 pentagonal pyramids and  an edgeedge with one Ca(3)O6 pentagonal pyramid. The P(4)-O(22) bond length is 1.52 Å. The P(4)-O(23) bond length is 1.53 Å. The P(4)-O(24) bond length is 1.55 Å. In the fifth P site, P(5) is bonded to one C(33), one O(29), one O(30), and one O(31) atom to form PCO3 tetrahedra that share corners with two equivalent Ca(3)O6 pentagonal pyramids and  an edgeedge with one Ca(4)O6 pentagonal pyramid. The P(5)-O(29) bond length is 1.55 Å. The P(5)-O(30) bond length is 1.53 Å. The P(5)-O(31) bond length is 1.53 Å. In the sixth P site, P(6) is bonded in a tetrahedral geometry to one C(41), one O(36), one O(37), and one O(38) atom. The P(6)-O(36) bond length is 1.55 Å. The P(6)-O(37) bond length is 1.54 Å. The P(6)-O(38) bond length is 1.56 Å. There are forty-two inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Ca(1), one Ca(2), and one P(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Ca(1), one Ca(2), and one P(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to one P(1) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one C(7) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Ca(1) and one C(7) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one C(8) atom. In the seventh O site, O(7) is bonded in a single-bond geometry to one C(8) atom. In the eighth O site, O(8) is bonded in a single-bond geometry to one P(2) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Ca(1), one Ca(2), and one P(2) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Ca(1), one Ca(2), and one P(2) atom. In the eleventh O site, O(11) is bonded in a single-bond geometry to one C(15) atom. In the twelfth O site, O(12) is bonded in a distorted single-bond geometry to one Ca(2) and one C(15) atom. In the thirteenth O site, O(13) is bonded in a single-bond geometry to one C(16) atom. In the fourteenth O site, O(14) is bonded in a single-bond geometry to one C(16) atom. In the fifteenth O site, O(15) is bonded in a distorted bent 120 degrees geometry to one Ca(4) and one P(3) atom. In the sixteenth O site, O(16) is bonded in a single-bond geometry to one P(3) atom. In the seventeenth O site, O(17) is bonded in a single-bond geometry to one P(3) atom. In the eighteenth O site, O(18) is bonded in a single-bond geometry to one C(23) atom. In the nineteenth O site, O(19) is bonded in a distorted bent 120 degrees geometry to one Ca(1) and one C(23) atom. In the twentieth O site, O(20) is bonded in a single-bond geometry to one C(24) atom. In the twenty-first O site, O(21) is bonded in a single-bond geometry to one C(24) atom. In the twenty-second O site, O(22) is bonded in a 3-coordinate geometry to one Ca(3), one Ca(4), and one P(4) atom. In the twenty-third O site, O(23) is bonded in a 3-coordinate geometry to one Ca(3), one Ca(4), and one P(4) atom. In the twenty-fourth O site, O(24) is bonded in a single-bond geometry to one P(4) atom. In the twenty-fifth O site, O(25) is bonded in a single-bond geometry to one C(31) atom. In the twenty-sixth O site, O(26) is bonded in a distorted single-bond geometry to one Ca(3) and one C(31) atom. In the twenty-seventh O site, O(27) is bonded in a single-bond geometry to one C(32) atom. In the twenty-eighth O site, O(28) is bonded in a single-bond geometry to one C(32) atom. In the twenty-ninth O site, O(29) is bonded in a single-bond geometry to one P(5) atom. In the thirtieth O site, O(30) is bonded in a 3-coordinate geometry to one Ca(3), one Ca(4), and one P(5) atom. In the thirty-first O site, O(31) is bonded in a 3-coordinate geometry to one Ca(3), one Ca(4), and one P(5) atom. In the thirty-second O site, O(32) is bonded in a single-bond geometry to one C(39) atom. In the thirty-third O site, O(33) is bonded in a distorted single-bond geometry to one Ca(4) and one C(39) atom. In the thirty-fourth O site, O(34) is bonded in a single-bond geometry to one C(40) atom. In the thirty-fifth O site, O(35) is bonded in a single-bond geometry to one C(40) atom. In the thirty-sixth O site, O(36) is bonded in a distorted single-bond geometry to one Ca(2) and one P(6) atom. In the thirty-seventh O site, O(37) is bonded in a single-bond geometry to one P(6) atom. In the thirty-eighth O site, O(38) is bonded in a single-bond geometry to one P(6) atom. In the thirty-ninth O site, O(39) is bonded in a single-bond geometry to one C(47) atom. In the fortieth O site, O(40) is bonded in a distorted bent 150 degrees geometry to one Ca(3) and one C(47) atom. In the forty-first O site, O(41) is bonded in a single-bond geometry to one C(48) atom. In the forty-second O site, O(42) is bonded in a single-bond geometry to one C(48) atom. Linkers: 12 [O]C(=O)c1[c]c(C([O])=O)[c]c(P([O])([O])=O)[c]1. Metal clusters: 8 [Ca]. The MOF has largest included sphere 4.62 A, density 1.47 g/cm3, surface area 4042.18 m2/g, accessible volume 0.27 cm3/g