Materials Data on TiAs2 by Materials Project

TiAs2 crystallizes in the orthorhombic Pnnm space group. The structure is three-dimensional. there are two inequivalent Ti4+ sites. In the first Ti4+ site, Ti4+ is bonded in a 7-coordinate geometry to seven As2- atoms. There are a spread of Ti–As bond distances ranging from 2.57–2.85 Å. In the second Ti4+ site, Ti4+ is bonded to seven As2- atoms to form a mixture of distorted edge and face-sharing TiAs7 pentagonal bipyramids. There are a spread of Ti–As bond distances ranging from 2.56–2.74 Å. There are four inequivalent As2- sites. In the first As2- site, As2- is bonded in a 5-coordinate geometry to five Ti4+ atoms. In the second As2- site, As2- is bonded in a 3-coordinate geometry to three equivalent Ti4+ atoms. In the third As2- site, As2- is bonded in a 2-coordinate geometry to two Ti4+ atoms. In the fourth As2- site, As2- is bonded in a distorted rectangular see-saw-like geometry to four Ti4+ atoms.