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Ca2InGa crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two Ca2InGa ribbons oriented in the (1, 0, 0) direction. Ca is bonded in a linear geometry to one In and one Ga atom. The Ca–In bond length is 3.06 Å. The Ca–Ga bond length is 2.95 Å. In is bonded in a linear geometry to two equivalent Ca atoms. Ga is bonded in a linear geometry to two equivalent Ca atoms.
Ca3(InGa2)2 crystallizes in the monoclinic Cm space group. The structure is three-dimensional. there are six inequivalent Ca sites. In the first Ca site, Ca is bonded in a 12-coordinate geometry to six In and six Ga atoms. There are three shorter (3.14 Å) and three longer (3.63 Å) Ca–In bond lengths. There are a spread of Ca–Ga bond distances ranging from 3.08–3.44 Å. In the second Ca site, Ca is bonded in a 12-coordinate geometry to three equivalent In and nine Ga atoms. There are two shorter (3.17 Å) and one longer (3.18 Å) Ca–In bond lengths. There are a spread of Ca–Ga bond distances ranging from 3.09–3.62 Å. In the third Ca site, Ca is bonded in a 12-coordinate geometry to three equivalent In and nine Ga atoms. All Ca–In bond lengths are 3.17 Å. There are a spread of Ca–Ga bond distances ranging from 3.09–3.61 Å. In the fourth Ca site, Ca is bonded in a 12-coordinate geometry to six In and six Ga atoms. There are a spread of Ca–In bond distances ranging from 3.13–3.63 Å. There are three shorter (3.08 Å) and three longer (3.43 Å) Ca–Ga bond lengths. In the fifth Ca site, Ca is bonded in a 12-coordinate geometry to three equivalent In and nine Ga atoms. All Ca–In bond lengths are 3.50 Å. There are a spread of Ca–Ga bond distances ranging from 3.08–3.47 Å. In the sixth Ca site, Ca is bonded in a 12-coordinate geometry to three equivalent In and nine Ga atoms. There are one shorter (3.49 Å) and two longer (3.50 Å) Ca–In bond lengths. There are a spread of Ca–Ga bond distances ranging from 3.08–3.48 Å. There are four inequivalent In sites. In the first In site, In is bonded in a 10-coordinate geometry to six Ca, three equivalent In, and one Ga atom. There are one shorter (2.82 Å) and two longer (2.83 Å) In–In bond lengths. The In–Ga bond length is 3.08 Å. In the second In site, In is bonded in a 10-coordinate geometry to six Ca and four Ga atoms. There are three shorter (2.80 Å) and one longer (3.16 Å) In–Ga bond lengths. In the third In site, In is bonded in a 10-coordinate geometry to six Ca and four Ga atoms. There are three shorter (2.80 Å) and one longer (3.15 Å) In–Ga bond lengths. In the fourth In site, In is bonded in a 10-coordinate geometry to six Ca, three equivalent In, and one Ga atom. The In–Ga bond length is 3.07 Å. There are eight inequivalent Ga sites. In the first Ga site, Ga is bonded in a 10-coordinate geometry to six Ca, three equivalent In, and one Ga atom. The Ga–Ga bond length is 3.00 Å. In the second Ga site, Ga is bonded in a 10-coordinate geometry to six Ca, three equivalent In, and one Ga atom. The Ga–Ga bond length is 3.00 Å. In the third Ga site, Ga is bonded in a 10-coordinate geometry to six Ca, one In, and three equivalent Ga atoms. There are two shorter (2.77 Å) and one longer (2.78 Å) Ga–Ga bond lengths. In the fourth Ga site, Ga is bonded in a 10-coordinate geometry to six Ca and four Ga atoms. All Ga–Ga bond lengths are 2.78 Å. In the fifth Ga site, Ga is bonded in a 10-coordinate geometry to six Ca and four Ga atoms. All Ga–Ga bond lengths are 2.78 Å. In the sixth Ga site, Ga is bonded in a 10-coordinate geometry to six Ca, one In, and three equivalent Ga atoms. In the seventh Ga site, Ga is bonded in a 10-coordinate geometry to six Ca, one In, and three equivalent Ga atoms. In the eighth Ga site, Ga is bonded in a 10-coordinate geometry to six Ca, one In, and three equivalent Ga atoms.