Materials Data on K2P3NO12 by Materials Project

Abstract

(K2(PO4)3)2N2 crystallizes in the tetragonal I-42d space group. The structure is three-dimensional and consists of four ammonia molecules and one K2(PO4)3 framework. In the K2(PO4)3 framework, K is bonded in a 8-coordinate geometry to eight O atoms. There are a spread of K–O bond distances ranging from 2.81–2.99 Å. There are two inequivalent P sites. In the first P site, P is bonded in a tetrahedral geometry to four O atoms. There is two shorter (1.54 Å) and two longer (1.55 Å) P–O bond length. In the second P site, P is bonded in a tetrahedral geometry to four equivalent O atoms. All P–O bond lengths are 1.55 Å. There are three inequivalent O sites. In the first O site, O is bonded in a single-bond geometry to one K and one P atom. In the second O site, O is bonded in a distorted single-bond geometry to one K and one P atom. In the third O site, O is bonded in a distorted single-bond geometry to two equivalent K and one P atom.