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MgCl6 crystallizes in the orthorhombic Cmmm space group. The structure is zero-dimensional and consists of four hydrochloric acid molecules and two MgCl4 clusters. In each MgCl4 cluster, Mg is bonded in a distorted rectangular see-saw-like geometry to four equivalent Cl atoms. All Mg–Cl bond lengths are 2.34 Å. Cl is bonded in a single-bond geometry to one Mg atom.
Li10Mg7Cl24 is Spinel-like structured and crystallizes in the monoclinic Cm space group. The structure is three-dimensional. there are twenty inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded to six Cl1- atoms to form LiCl6 octahedra that share corners with three LiCl4 tetrahedra and edges with six MgCl6 octahedra. There are a spread of Li–Cl bond distances ranging from 2.53–2.64 Å. In the second Li1+ site, Li1+ is bonded to four Cl1- atoms to form LiCl4 tetrahedra that share corners with six LiCl6 octahedra and corners with six MgCl6 octahedra. The corner-sharing octahedra tilt angles range from 56–58°. There are a spread of Li–Cl bond distances ranging from 2.37–2.45 Å. In the third Li1+ site, Li1+ is bonded to six Cl1- atoms to form LiCl6 octahedra that share corners with four LiCl4 tetrahedra, an edgeedge with one LiCl6 octahedra, and edges with five MgCl6 octahedra. There are a spread of Li–Cl bond distances ranging from 2.54–2.61 Å. In the fourth Li1+ site, Li1+ is bonded to four Cl1- atoms to form LiCl4 tetrahedra that share corners with six LiCl6 octahedra and corners with six MgCl6 octahedra. The corner-sharing octahedra tilt angles range from 56–58°. There are two shorter (2.38 Å) and two longer (2.45 Å) Li–Cl bond lengths. In the fifth Li1+ site, Li1+ is bonded to six Cl1- atoms to form LiCl6 octahedra that share corners with six LiCl4 tetrahedra, edges with two LiCl6 octahedra, and edges with four MgCl6 octahedra. There are a spread of Li–Cl bond distances ranging from 2.56–2.63 Å. In the sixth Li1+ site, Li1+ is bonded to four Cl1- atoms to form LiCl4 tetrahedra that share corners with three LiCl6 octahedra and corners with nine MgCl6 octahedra. The corner-sharing octahedra tilt angles range from 56–60°. There are a spread of Li–Cl bond distances ranging from 2.38–2.49 Å. In the seventh Li1+ site, Li1+ is bonded to six Cl1- atoms to form LiCl6 octahedra that share corners with six LiCl4 tetrahedra, edges with two LiCl6 octahedra, and edges with four equivalent MgCl6 octahedra. There are a spread of Li–Cl bond distances ranging from 2.56–2.60 Å. In the eighth Li1+ site, Li1+ is bonded to six Cl1- atoms to form LiCl6 octahedra that share corners with six LiCl4 tetrahedra, edges with two LiCl6 octahedra, and edges with four MgCl6 octahedra. There are a spread of Li–Cl bond distances ranging from 2.56–2.60 Å. In the ninth Li1+ site, Li1+ is bonded to four Cl1- atoms to form LiCl4 tetrahedra that share corners with six LiCl6 octahedra and corners with six MgCl6 octahedra. The corner-sharing octahedra tilt angles range from 56–58°. There are a spread of Li–Cl bond distances ranging from 2.37–2.45 Å. In the tenth Li1+ site, Li1+ is bonded to four Cl1- atoms to form LiCl4 tetrahedra that share corners with six LiCl6 octahedra and corners with six MgCl6 octahedra. The corner-sharing octahedra tilt angles range from 56–59°. There are a spread of Li–Cl bond distances ranging from 2.38–2.46 Å. In the eleventh Li1+ site, Li1+ is bonded to six Cl1- atoms to form LiCl6 octahedra that share corners with six LiCl4 tetrahedra, edges with two LiCl6 octahedra, and edges with four equivalent MgCl6 octahedra. There are a spread of Li–Cl bond distances ranging from 2.56–2.60 Å. In the twelfth Li1+ site, Li1+ is bonded to four Cl1- atoms to form LiCl4 tetrahedra that share corners with six LiCl6 octahedra and corners with six MgCl6 octahedra. The corner-sharing octahedra tilt angles range from 54–59°. There are a spread of Li–Cl bond distances ranging from 2.36–2.44 Å. In the thirteenth Li1+ site, Li1+ is bonded to six Cl1- atoms to form LiCl6 octahedra that share corners with six LiCl4 tetrahedra, edges with two LiCl6 octahedra, and edges with four MgCl6 octahedra. There are four shorter (2.56 Å) and two longer (2.60 Å) Li–Cl bond lengths. In the fourteenth Li1+ site, Li1+ is bonded to four Cl1- atoms to form LiCl4 tetrahedra that share corners with six LiCl6 octahedra and corners with six MgCl6 octahedra. The corner-sharing octahedra tilt angles range from 56–58°. There are two shorter (2.38 Å) and two longer (2.45 Å) Li–Cl bond lengths. In the fifteenth Li1+ site, Li1+ is bonded to six Cl1- atoms to form LiCl6 octahedra that share corners with six LiCl4 tetrahedra, edges with two LiCl6 octahedra, and edges with four equivalent MgCl6 octahedra. There are a spread of Li–Cl bond distances ranging from 2.56–2.60 Å. In the sixteenth Li1+ site, Li1+ is bonded to six Cl1- atoms to form LiCl6 octahedra that share corners with six LiCl4 tetrahedra, edges with two LiCl6 octahedra, and edges with four MgCl6 octahedra. There are a spread of Li–Cl bond distances ranging from 2.53–2.65 Å. In the seventeenth Li1+ site, Li1+ is bonded to four Cl1- atoms to form LiCl4 tetrahedra that share corners with six LiCl6 octahedra and corners with six MgCl6 octahedra. The corner-sharing octahedra tilt angles range from 56–58°. There are two shorter (2.37 Å) and two longer (2.45 Å) Li–Cl bond lengths. In the eighteenth Li1+ site, Li1+ is bonded to six Cl1- atoms to form LiCl6 octahedra that share corners with five LiCl4 tetrahedra, an edgeedge with one LiCl6 octahedra, and edges with five MgCl6 octahedra. There are a spread of Li–Cl bond distances ranging from 2.52–2.66 Å. In the nineteenth Li1+ site, Li1+ is bonded to four Cl1- atoms to form LiCl4 tetrahedra that share corners with six LiCl6 octahedra and corners with six MgCl6 octahedra. The corner-sharing octahedra tilt angles range from 55–59°. There are a spread of Li–Cl bond distances ranging from 2.37–2.50 Å. In the twentieth Li1+ site, Li1+ is bonded to four Cl1- atoms to form LiCl4 tetrahedra that share corners with three LiCl6 octahedra and corners with nine MgCl6 octahedra. The corner-sharing octahedra tilt angles range from 58–60°. There are a spread of Li–Cl bond distances ranging from 2.39–2.50 Å. There are eight inequivalent Mg2+ sites. In the first Mg2+ site, Mg2+ is bonded to six Cl1- atoms to form MgCl6 octahedra that share corners with three LiCl4 tetrahedra, edges with two equivalent LiCl6 octahedra, and edges with four MgCl6 octahedra. There are a spread of Mg–Cl bond distances ranging from 2.47–2.61 Å. In the second Mg2+ site, Mg2+ is bonded to six Cl1- atoms to form MgCl6 octahedra that share corners with four LiCl4 tetrahedra, edges with three LiCl6 octahedra, and edges with three MgCl6 octahedra. There are a spread of Mg–Cl bond distances ranging from 2.48–2.56 Å. In the third Mg2+ site, Mg2+ is bonded to six Cl1- atoms to form MgCl6 octahedra that share corners with three equivalent LiCl4 tetrahedra, edges with two LiCl6 octahedra, and edges with four MgCl6 octahedra. There are a spread of Mg–Cl bond distances ranging from 2.46–2.64 Å. In the fourth Mg2+ site, Mg2+ is bonded to six Cl1- atoms to form MgCl6 octahedra that share corners with six LiCl4 tetrahedra, edges with two equivalent MgCl6 octahedra, and edges with four LiCl6 octahedra. There are two shorter (2.49 Å) and four longer (2.55 Å) Mg–Cl bond lengths. In the fifth Mg2+ site, Mg2+ is bonded to six Cl1- atoms to form MgCl6 octahedra that share corners with six LiCl4 tetrahedra, edges with two equivalent MgCl6 octahedra, and edges with four LiCl6 octahedra. There are two shorter (2.49 Å) and four longer (2.55 Å) Mg–Cl bond lengths. In the sixth Mg2+ site, Mg2+ is bonded to six Cl1- atoms to form MgCl6 octahedra that share corners with six LiCl4 tetrahedra, edges with two equivalent MgCl6 octahedra, and edges with four LiCl6 octahedra. There are a spread of Mg–Cl bond distances ranging from 2.49–2.56 Å. In the seventh Mg2+ site, Mg2+ is bonded to six Cl1- atoms to form MgCl6 octahedra that share corners with five LiCl4 tetrahedra, edges with three LiCl6 octahedra, and edges with three MgCl6 octahedra. There are a spread of Mg–Cl bond distances ranging from 2.47–2.61 Å. In the eighth Mg2+ site, Mg2+ is bonded to six Cl1- atoms to form MgCl6 octahedra that share corners with three equivalent LiCl4 tetrahedra, edges with two LiCl6 octahedra, and edges with four MgCl6 octahedra. There are a spread of Mg–Cl bond distances ranging from 2.46–2.62 Å. There are thirty-six inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a distorted T-shaped geometry to three Mg2+ atoms. In the second Cl1- site, Cl1- is bonded in a distorted T-shaped geometry to one Li1+ and two equivalent Mg2+ atoms. In the third Cl1- site, Cl1- is bonded in a distorted T-shaped geometry to one Li1+ and two Mg2+ atoms. In the fourth Cl1- site, Cl1- is bonded to two Li1+ and two Mg2+ atoms to form a mixture of distorted corner and edge-sharing ClLi2Mg2 trigonal pyramids. In the fifth Cl1- site, Cl1- is bonded in a distorted T-shaped geometry to three Mg2+ atoms. In the sixth Cl1- site, Cl1- is bonded in a distorted T-shaped geometry to one Li1+ and two Mg2+ atoms. In the seventh Cl1- site, Cl1- is bonded in a distorted rectangular see-saw-like geometry to two Li1+ and two equivalent Mg2+ atoms. In the eighth Cl1- site, Cl1- is bonded to two Li1+ and two equivalent Mg2+ atoms to form a mixture of distorted corner and edge-sharing ClLi2Mg2 trigonal pyramids. In the ninth Cl1- site, Cl1- is bonded to one Li1+ and three Mg2+ atoms to form a mixture of distorted corner and edge-sharing ClLiMg3 trigonal pyramids. In the tenth Cl1- site, Cl1- is bonded to three Li1+ and one Mg2+ atom to form a mixture of distorted corner and edge-sharing ClLi3Mg trigonal pyramids. In the eleventh Cl1- site, Cl1- is bonded in a distorted rectangular see-saw-like geometry to two Li1+ and two equivalent Mg2+ atoms. In the twelfth Cl1- site, Cl1- is bonded in a distorted rectangular see-saw-like geometry to two Li1+ and two equivalent Mg2+ atoms. In the thirteenth Cl1- site, Cl1- is bonded to three Li1+ and one Mg2+ atom to form a mixture of distorted corner and edge-sharing ClLi3Mg trigonal pyramids. In the fourteenth Cl1- site, Cl1- is bonded in a distorted rectangular see-saw-like geometry to two Li1+ and two equivalent Mg2+ atoms. In the fifteenth Cl1- site, Cl1- is bonded in a rectangular see-saw-like geometry to two Li1+ and two equivalent Mg2+ atoms. In the sixteenth Cl1- site, Cl1- is bonded to three Li1+ and one Mg2+ atom to form a mixture of distorted corner and edge-sharing ClLi3Mg trigonal pyramids. In the seventeenth Cl1- site, Cl1- is bonded in a distorted rectangular see-saw-like geometry to two Li1+ and two equivalent Mg2+ atoms. In the eighteenth Cl1- site, Cl1- is bonded to three Li1+ and one Mg2+ atom to form a mixture of distorted corner and edge-sharing ClLi3Mg trigonal pyramids. In the nineteenth Cl1- site, Cl1- is bonded in a distorted rectangular see-saw-like geometry to two Li1+ and two equivalent Mg2+ atoms. In the twentieth Cl1- site, Cl1- is bonded in a distorted rectangular see-saw-like geometry to two Li1+ and two equivalent Mg2+ atoms. In the twenty-first Cl1- site, Cl1- is bonded in a distorted rectangular see-saw-like geometry to two Li1+ and two equivalent Mg2+ atoms. In the twenty-second Cl1- site, Cl1- is bonded to three Li1+ and one Mg2+ atom to form a mixture of distorted corner and edge-sharing ClLi3Mg trigonal pyramids. In the twenty-third Cl1- site, Cl1- is bonded in a distorted rectangular see-saw-like geometry to two Li1+ and two equivalent Mg2+ atoms. In the twenty-fourth Cl1- site, Cl1- is bonded in a distorted rectangular see-saw-like geometry to two Li1+ and two equivalent Mg2+ atoms. In the twenty-fifth Cl1- site, Cl1- is bonded to three Li1+ and one Mg2+ atom to form a mixture of distorted corner and edge-sharing ClLi3Mg trigonal pyramids. In the twenty-sixth Cl1- site, Cl1- is bonded in a distorted rectangular see-saw-like geometry to two Li1+ and two equivalent Mg2+ atoms. In the twenty-seventh Cl1- site, Cl1- is bonded in a distorted rectangular see-saw-like geometry to two Li1+ and two equivalent Mg2+ atoms. In the twenty-eighth Cl1- site, Cl1- is bonded in a distorted rectangular see-saw-like geometry to three Li1+ and one Mg2+ atom. In the twenty-ninth
RbMgCl3 is (Cubic) Perovskite-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. there are two inequivalent Rb1+ sites. In the first Rb1+ site, Rb1+ is bonded to twelve Cl1- atoms to form RbCl12 cuboctahedra that share corners with nine RbCl12 cuboctahedra, corners with three equivalent MgCl6 octahedra, faces with seven RbCl12 cuboctahedra, and faces with seven MgCl6 octahedra. The corner-sharing octahedral tilt angles are 14°. There are nine shorter (3.59 Å) and three longer (3.69 Å) Rb–Cl bond lengths. In the second Rb1+ site, Rb1+ is bonded to twelve Cl1- atoms to form RbCl12 cuboctahedra that share corners with twelve RbCl12 cuboctahedra, faces with six equivalent RbCl12 cuboctahedra, and faces with eight MgCl6 octahedra. There are six shorter (3.59 Å) and six longer (3.64 Å) Rb–Cl bond lengths. There are two inequivalent Mg2+ sites. In the first Mg2+ site, Mg2+ is bonded to six Cl1- atoms to form MgCl6 octahedra that share corners with three equivalent RbCl12 cuboctahedra, corners with three equivalent MgCl6 octahedra, faces with seven RbCl12 cuboctahedra, and a faceface with one MgCl6 octahedra. The corner-sharing octahedral tilt angles are 1°. There are three shorter (2.51 Å) and three longer (2.54 Å) Mg–Cl bond lengths. In the second Mg2+ site, Mg2+ is bonded to six equivalent Cl1- atoms to form MgCl6 octahedra that share corners with six equivalent MgCl6 octahedra and faces with eight RbCl12 cuboctahedra. The corner-sharing octahedral tilt angles are 1°. All Mg–Cl bond lengths are 2.52 Å. There are two inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a distorted linear geometry to four Rb1+ and two Mg2+ atoms. In the second Cl1- site, Cl1- is bonded in a 6-coordinate geometry to four Rb1+ and two equivalent Mg2+ atoms.
RbMgCl3 is (Cubic) Perovskite-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. there are two inequivalent Rb1+ sites. In the first Rb1+ site, Rb1+ is bonded to twelve Cl1- atoms to form RbCl12 cuboctahedra that share corners with twelve equivalent RbCl12 cuboctahedra, faces with six equivalent RbCl12 cuboctahedra, and faces with eight equivalent MgCl6 octahedra. There are six shorter (3.60 Å) and six longer (3.65 Å) Rb–Cl bond lengths. In the second Rb1+ site, Rb1+ is bonded to twelve Cl1- atoms to form RbCl12 cuboctahedra that share corners with six equivalent RbCl12 cuboctahedra, corners with six equivalent MgCl6 octahedra, faces with eight RbCl12 cuboctahedra, and faces with six equivalent MgCl6 octahedra. The corner-sharing octahedral tilt angles are 15°. There are six shorter (3.60 Å) and six longer (3.72 Å) Rb–Cl bond lengths. Mg2+ is bonded to six Cl1- atoms to form MgCl6 octahedra that share corners with three equivalent RbCl12 cuboctahedra, corners with three equivalent MgCl6 octahedra, faces with seven RbCl12 cuboctahedra, and a faceface with one MgCl6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Mg–Cl bond lengths are 2.52 Å. There are two inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a 2-coordinate geometry to four Rb1+ and two equivalent Mg2+ atoms. In the second Cl1- site, Cl1- is bonded in a distorted linear geometry to four Rb1+ and two equivalent Mg2+ atoms.
CsMgCl3 crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Cs1+ is bonded to twelve equivalent Cl1- atoms to form CsCl12 cuboctahedra that share corners with six equivalent CsCl12 cuboctahedra, corners with six equivalent MgCl6 octahedra, faces with eight equivalent CsCl12 cuboctahedra, and faces with six equivalent MgCl6 octahedra. The corner-sharing octahedral tilt angles are 15°. There are six shorter (3.71 Å) and six longer (3.89 Å) Cs–Cl bond lengths. Mg2+ is bonded to six equivalent Cl1- atoms to form MgCl6 octahedra that share corners with six equivalent CsCl12 cuboctahedra, faces with six equivalent CsCl12 cuboctahedra, and faces with two equivalent MgCl6 octahedra. All Mg–Cl bond lengths are 2.52 Å. Cl1- is bonded in a 2-coordinate geometry to four equivalent Cs1+ and two equivalent Mg2+ atoms.
Li2MgCl4 is Spinel-like structured and crystallizes in the orthorhombic Imma space group. The structure is three-dimensional. there are two inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded to four Cl1- atoms to form LiCl4 tetrahedra that share corners with six equivalent LiCl6 octahedra and corners with six equivalent MgCl6 octahedra. The corner-sharing octahedra tilt angles range from 56–58°. There are two shorter (2.38 Å) and two longer (2.45 Å) Li–Cl bond lengths. In the second Li1+ site, Li1+ is bonded to six Cl1- atoms to form LiCl6 octahedra that share corners with six equivalent LiCl4 tetrahedra, edges with two equivalent LiCl6 octahedra, and edges with four equivalent MgCl6 octahedra. There are four shorter (2.57 Å) and two longer (2.59 Å) Li–Cl bond lengths. Mg2+ is bonded to six Cl1- atoms to form MgCl6 octahedra that share corners with six equivalent LiCl4 tetrahedra, edges with two equivalent MgCl6 octahedra, and edges with four equivalent LiCl6 octahedra. There are two shorter (2.49 Å) and four longer (2.55 Å) Mg–Cl bond lengths. There are two inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a distorted rectangular see-saw-like geometry to two Li1+ and two equivalent Mg2+ atoms. In the second Cl1- site, Cl1- is bonded in a distorted rectangular see-saw-like geometry to three Li1+ and one Mg2+ atom.
Mg(AlCl4)2 crystallizes in the monoclinic C2/c space group. The structure is one-dimensional and consists of two Mg(AlCl4)2 ribbons oriented in the (0, 0, 1) direction. Mg2+ is bonded to six Cl1- atoms to form MgCl6 octahedra that share corners with two equivalent AlCl4 tetrahedra and edges with two equivalent AlCl4 tetrahedra. There are two shorter (2.53 Å) and four longer (2.56 Å) Mg–Cl bond lengths. Al3+ is bonded to four Cl1- atoms to form AlCl4 tetrahedra that share a cornercorner with one MgCl6 octahedra and an edgeedge with one MgCl6 octahedra. The corner-sharing octahedral tilt angles are 55°. There are one shorter (2.10 Å) and three longer (2.19 Å) Al–Cl bond lengths. There are four inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a single-bond geometry to one Al3+ atom. In the second Cl1- site, Cl1- is bonded in an L-shaped geometry to one Mg2+ and one Al3+ atom. In the third Cl1- site, Cl1- is bonded in a bent 120 degrees geometry to one Mg2+ and one Al3+ atom. In the fourth Cl1- site, Cl1- is bonded in an L-shaped geometry to one Mg2+ and one Al3+ atom.
Cs3Mg2Cl7 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Cs1+ sites. In the first Cs1+ site, Cs1+ is bonded in a 9-coordinate geometry to nine Cl1- atoms. There are a spread of Cs–Cl bond distances ranging from 3.48–3.64 Å. In the second Cs1+ site, Cs1+ is bonded to twelve Cl1- atoms to form CsCl12 cuboctahedra that share corners with four equivalent CsCl12 cuboctahedra, faces with four equivalent CsCl12 cuboctahedra, and faces with eight equivalent MgCl6 octahedra. All Cs–Cl bond lengths are 3.64 Å. Mg2+ is bonded to six Cl1- atoms to form MgCl6 octahedra that share corners with five equivalent MgCl6 octahedra and faces with four equivalent CsCl12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–2°. There are a spread of Mg–Cl bond distances ranging from 2.50–2.61 Å. There are three inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a distorted linear geometry to four Cs1+ and two equivalent Mg2+ atoms. In the second Cl1- site, Cl1- is bonded to five equivalent Cs1+ and one Mg2+ atom to form a mixture of distorted edge and corner-sharing ClCs5Mg octahedra. The corner-sharing octahedral tilt angles are 3°. In the third Cl1- site, Cl1- is bonded in a distorted linear geometry to four equivalent Cs1+ and two equivalent Mg2+ atoms.
K3Mg2Cl7 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 9-coordinate geometry to nine Cl1- atoms. There are a spread of K–Cl bond distances ranging from 3.16–3.56 Å. In the second K1+ site, K1+ is bonded to twelve Cl1- atoms to form KCl12 cuboctahedra that share corners with four equivalent KCl12 cuboctahedra, faces with four equivalent KCl12 cuboctahedra, and faces with eight equivalent MgCl6 octahedra. There are eight shorter (3.53 Å) and four longer (3.55 Å) K–Cl bond lengths. Mg2+ is bonded to six Cl1- atoms to form MgCl6 octahedra that share corners with five equivalent MgCl6 octahedra and faces with four equivalent KCl12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–3°. There are a spread of Mg–Cl bond distances ranging from 2.49–2.54 Å. There are three inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a distorted linear geometry to four K1+ and two equivalent Mg2+ atoms. In the second Cl1- site, Cl1- is bonded to five equivalent K1+ and one Mg2+ atom to form a mixture of distorted edge and corner-sharing ClK5Mg octahedra. The corner-sharing octahedral tilt angles are 9°. In the third Cl1- site, Cl1- is bonded in a distorted linear geometry to four equivalent K1+ and two equivalent Mg2+ atoms.
Na6MgCl8 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Na1+ is bonded to six Cl1- atoms to form NaCl6 octahedra that share corners with six equivalent NaCl6 octahedra, edges with two equivalent MgCl6 octahedra, and edges with eight equivalent NaCl6 octahedra. The corner-sharing octahedra tilt angles range from 0–11°. There are two shorter (2.84 Å) and four longer (2.85 Å) Na–Cl bond lengths. Mg2+ is bonded to six equivalent Cl1- atoms to form MgCl6 octahedra that share edges with twelve equivalent NaCl6 octahedra. All Mg–Cl bond lengths are 2.55 Å. There are two inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded to six equivalent Na1+ atoms to form ClNa6 octahedra that share corners with six equivalent ClNa6 octahedra and edges with twelve equivalent ClNa4Mg square pyramids. The corner-sharing octahedral tilt angles are 0°. In the second Cl1- site, Cl1- is bonded to four equivalent Na1+ and one Mg2+ atom to form ClNa4Mg square pyramids that share corners with nine equivalent ClNa4Mg square pyramids, edges with four equivalent ClNa6 octahedra, and edges with four equivalent ClNa4Mg square pyramids.
MgCl2 is trigonal omega-like structured and crystallizes in the trigonal R-3m space group. The structure is two-dimensional and consists of three MgCl2 sheets oriented in the (0, 0, 1) direction. Mg2+ is bonded to six equivalent Cl1- atoms to form edge-sharing MgCl6 octahedra. All Mg–Cl bond lengths are 2.53 Å. Cl1- is bonded in a distorted T-shaped geometry to three equivalent Mg2+ atoms.
K2MgCl4 is (La,Ba)CuO4 structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. K1+ is bonded in a 9-coordinate geometry to nine Cl1- atoms. There are a spread of K–Cl bond distances ranging from 3.12–3.55 Å. Mg2+ is bonded to six Cl1- atoms to form corner-sharing MgCl6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are four shorter (2.50 Å) and two longer (2.51 Å) Mg–Cl bond lengths. There are two inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded to four equivalent K1+ and two equivalent Mg2+ atoms to form a mixture of distorted edge, face, and corner-sharing ClK4Mg2 octahedra. The corner-sharing octahedra tilt angles range from 0–55°. In the second Cl1- site, Cl1- is bonded to five equivalent K1+ and one Mg2+ atom to form distorted ClK5Mg octahedra that share corners with seventeen ClK4Mg2 octahedra, edges with eight equivalent ClK5Mg octahedra, and faces with four equivalent ClK4Mg2 octahedra. The corner-sharing octahedra tilt angles range from 0–55°.
KMgCl3 is Orthorhombic Perovskite structured and crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. K1+ is bonded in a 10-coordinate geometry to eight Cl1- atoms. There are a spread of K–Cl bond distances ranging from 3.19–3.49 Å. Mg2+ is bonded to six Cl1- atoms to form corner-sharing MgCl6 octahedra. The corner-sharing octahedra tilt angles range from 16–20°. All Mg–Cl bond lengths are 2.53 Å. There are two inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a 5-coordinate geometry to three equivalent K1+ and two equivalent Mg2+ atoms. In the second Cl1- site, Cl1- is bonded in a 4-coordinate geometry to two equivalent K1+ and two equivalent Mg2+ atoms.
Na2MgCl4 crystallizes in the orthorhombic Pbam space group. The structure is three-dimensional. Na1+ is bonded in a 6-coordinate geometry to six Cl1- atoms. There are four shorter (2.82 Å) and two longer (2.97 Å) Na–Cl bond lengths. Mg2+ is bonded to six Cl1- atoms to form edge-sharing MgCl6 octahedra. There are two shorter (2.49 Å) and four longer (2.58 Å) Mg–Cl bond lengths. There are two inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a 4-coordinate geometry to two equivalent Na1+ and two equivalent Mg2+ atoms. In the second Cl1- site, Cl1- is bonded to four equivalent Na1+ and one Mg2+ atom to form a mixture of distorted edge and corner-sharing ClNa4Mg trigonal bipyramids.
MgCl2 is trigonal omega structured and crystallizes in the trigonal P-3m1 space group. The structure is two-dimensional and consists of one MgCl2 sheet oriented in the (0, 0, 1) direction. Mg2+ is bonded to six equivalent Cl1- atoms to form edge-sharing MgCl6 octahedra. All Mg–Cl bond lengths are 2.53 Å. Cl1- is bonded in a distorted T-shaped geometry to three equivalent Mg2+ atoms.
MgCl2 crystallizes in the orthorhombic Pmma space group. The structure is two-dimensional and consists of one MgCl2 sheet oriented in the (0, 0, 1) direction. Mg2+ is bonded to six Cl1- atoms to form a mixture of edge, face, and corner-sharing MgCl6 octahedra. The corner-sharing octahedral tilt angles are 50°. There are two shorter (2.38 Å) and four longer (2.67 Å) Mg–Cl bond lengths. There are two inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in an L-shaped geometry to two equivalent Mg2+ atoms. In the second Cl1- site, Cl1- is bonded in a 4-coordinate geometry to four equivalent Mg2+ atoms.
Rb2MgCl4 is (La,Ba)CuO4 structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Rb1+ is bonded in a 9-coordinate geometry to nine Cl1- atoms. There are a spread of Rb–Cl bond distances ranging from 3.32–3.58 Å. Mg2+ is bonded to six Cl1- atoms to form corner-sharing MgCl6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are two shorter (2.52 Å) and four longer (2.53 Å) Mg–Cl bond lengths. There are two inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded to four equivalent Rb1+ and two equivalent Mg2+ atoms to form a mixture of distorted edge, face, and corner-sharing ClRb4Mg2 octahedra. The corner-sharing octahedra tilt angles range from 0–57°. In the second Cl1- site, Cl1- is bonded to five equivalent Rb1+ and one Mg2+ atom to form distorted ClRb5Mg octahedra that share corners with seventeen ClRb4Mg2 octahedra, edges with eight equivalent ClRb5Mg octahedra, and faces with four equivalent ClRb4Mg2 octahedra. The corner-sharing octahedra tilt angles range from 0–57°.