Materials Data on TlPO4 by Materials Project
TlPO4 crystallizes in the monoclinic P2_1/c space group. The structure is two-dimensional and consists of four TlPO4 sheets oriented in the (0, 0, 1) direction. Tl3+ is bonded in a 4-coordinate geometry to four O2- atoms. There are two shorter (2.19 Å) and two longer (2.25 Å) Tl–O bond lengths. P5+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of P–O bond distances ranging from 1.55–1.57 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Tl3+ and one P5+ atom. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Tl3+ and one P5+ atom. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Tl3+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Tl3+ and one P5+ atom.