NaCaGaSi2O7 crystallizes in the orthorhombic P2_12_12_1 space group. Na(1) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(4), one O(5), and one O(7) atom. Ca(1) is bonded in a 6-coordinate geometry to one O(1), one O(3), one O(4), one O(5), one O(6), and one O(7) atom. Ga(1) is bonded in a 3-coordinate geometry to one O(2), one O(4), and one O(7) atom. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(3), one O(6), and one O(7) atom to form corner-sharing SiO4 tetrahedra. In the second Si site, Si(2) is bonded to one O(1), one O(2), one O(5), and one O(6) atom to form corner-sharing SiO4 tetrahedra. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Ca(1), one Si(1), and one Si(2) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Na(1), one Ga(1), and one Si(2) atom. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Na(1), one Ca(1), and one Si(1) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Ca(1), one Ga(1), and one O(5) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Na(1), one Ca(1), one Si(2), and one O(4) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Ca(1), one Si(1), and one Si(2) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Na(1), one Ca(1), one Ga(1), and one Si(1) atom.
NaCaGaSi2O7 crystallizes in the orthorhombic P2_12_12_1 space group. Na(1) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(4), one O(5), and one O(7) atom. The Na(1)-O(2) bond length is 2.37 Å. The Na(1)-O(3) bond length is 2.31 Å. The Na(1)-O(4) bond length is 2.34 Å. The Na(1)-O(5) bond length is 2.45 Å. The Na(1)-O(7) bond length is 2.33 Å. Ca(1) is bonded in a 6-coordinate geometry to one O(1), one O(3), one O(4), one O(5), one O(6), and one O(7) atom. The Ca(1)-O(1) bond length is 2.68 Å. The Ca(1)-O(3) bond length is 2.28 Å. The Ca(1)-O(4) bond length is 2.60 Å. The Ca(1)-O(5) bond length is 2.36 Å. The Ca(1)-O(6) bond length is 2.55 Å. The Ca(1)-O(7) bond length is 2.51 Å. Ga(1) is bonded in a 3-coordinate geometry to one O(2), one O(4), and one O(7) atom. The Ga(1)-O(2) bond length is 2.35 Å. The Ga(1)-O(4) bond length is 2.33 Å. The Ga(1)-O(7) bond length is 2.03 Å. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(3), one O(6), and one O(7) atom to form corner-sharing SiO4 tetrahedra. The Si(1)-O(1) bond length is 1.68 Å. The Si(1)-O(3) bond length is 1.60 Å. The Si(1)-O(6) bond length is 1.67 Å. The Si(1)-O(7) bond length is 1.63 Å. In the second Si site, Si(2) is bonded to one O(1), one O(2), one O(5), and one O(6) atom to form corner-sharing SiO4 tetrahedra. The Si(2)-O(1) bond length is 1.66 Å. The Si(2)-O(2) bond length is 1.59 Å. The Si(2)-O(5) bond length is 1.69 Å. The Si(2)-O(6) bond length is 1.64 Å. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Ca(1), one Si(1), and one Si(2) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Na(1), one Ga(1), and one Si(2) atom. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Na(1), one Ca(1), and one Si(1) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Ca(1), one Ga(1), and one O(5) atom. The O(4)-O(5) bond length is 1.50 Å. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Na(1), one Ca(1), one Si(2), and one O(4) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Ca(1), one Si(1), and one Si(2) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Na(1), one Ca(1), one Ga(1), and one Si(1) atom.