Materials Data on La2AsI2 by Materials Project
La2AsI2 is MAX Phase-like structured and crystallizes in the trigonal P-3m1 space group. The structure is two-dimensional and consists of one La2AsI2 sheet oriented in the (0, 0, 1) direction. La+2.50+ is bonded to three equivalent As3- and three equivalent I1- atoms to form a mixture of edge and corner-sharing LaAs3I3 octahedra. The corner-sharing octahedral tilt angles are 0°. All La–As bond lengths are 3.05 Å. All La–I bond lengths are 3.30 Å. As3- is bonded to six equivalent La+2.50+ atoms to form edge-sharing AsLa6 octahedra. I1- is bonded in a 3-coordinate geometry to three equivalent La+2.50+ atoms.
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