Materials Data on La3AlCdS7 by Materials Project
La3CdAlS7 crystallizes in the hexagonal P6_3 space group. The structure is three-dimensional. La3+ is bonded in a 8-coordinate geometry to eight S2- atoms. There are a spread of La–S bond distances ranging from 2.86–3.32 Å. Cd2+ is bonded to six equivalent S2- atoms to form face-sharing CdS6 octahedra. There are three shorter (2.73 Å) and three longer (2.76 Å) Cd–S bond lengths. Al3+ is bonded in a tetrahedral geometry to four S2- atoms. There are one shorter (2.24 Å) and three longer (2.27 Å) Al–S bond lengths. There are three inequivalent S2- sites. In the first S2- site, S2- is bonded in a 6-coordinate geometry to four equivalent La3+ and two equivalent Cd2+ atoms. In the second S2- site, S2- is bonded in a distorted rectangular see-saw-like geometry to three equivalent La3+ and one Al3+ atom. In the third S2- site, S2- is bonded in a distorted tetrahedral geometry to three equivalent La3+ and one Al3+ atom.