Materials Data on K2Zn4P4O21 by Materials Project
(KZn2(PO5)2)4O2 crystallizes in the triclinic P-1 space group. The structure is three-dimensional and consists of one hydrogen peroxide molecule and one KZn2(PO5)2 framework. In the KZn2(PO5)2 framework, there are two inequivalent K sites. In the first K site, K is bonded in a 9-coordinate geometry to nine O atoms. There are a spread of K–O bond distances ranging from 2.72–3.24 Å. In the second K site, K is bonded in a 7-coordinate geometry to seven O atoms. There are a spread of K–O bond distances ranging from 2.88–3.32 Å. There are four inequivalent Zn sites. In the first Zn site, Zn is bonded in a rectangular see-saw-like geometry to four O atoms. There are a spread of Zn–O bond distances ranging from 1.88–2.06 Å. In the second Zn site, Zn is bonded to four O atoms to form ZnO4 tetrahedra that share corners with four PO4 tetrahedra. There are a spread of Zn–O bond distances ranging from 1.93–1.98 Å. In the third Zn site, Zn is bonded to four O atoms to form ZnO4 tetrahedra that share corners with four PO4 tetrahedra. There are a spread of Zn–O bond distances ranging from 1.92–2.00 Å. In the fourth Zn site, Zn is bonded to four O atoms to form ZnO4 tetrahedra that share corners with four PO4 tetrahedra. There are a spread of Zn–O bond distances ranging from 1.93–2.03 Å. There are four inequivalent P sites. In the first P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with three ZnO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.54–1.58 Å. In the second P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with three ZnO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.53–1.56 Å. In the third P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with four ZnO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.54–1.59 Å. In the fourth P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with two ZnO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.54–1.56 Å. There are twenty inequivalent O sites. In the first O site, O is bonded in a distorted T-shaped geometry to two equivalent Zn and one P atom. In the second O site, O is bonded in a 3-coordinate geometry to one K, one Zn, and one P atom. In the third O site, O is bonded in a distorted bent 120 degrees geometry to one K, one Zn, and one P atom. In the fourth O site, O is bonded in a distorted bent 120 degrees geometry to one K, one Zn, and one P atom. In the fifth O site, O is bonded in a distorted single-bond geometry to one K and one P atom. In the sixth O site, O is bonded in a 2-coordinate geometry to one K, one Zn, and one P atom. In the seventh O site, O is bonded in a distorted bent 120 degrees geometry to one Zn and one P atom. In the eighth O site, O is bonded in a 2-coordinate geometry to one K, one Zn, and one P atom. In the ninth O site, O is bonded in a 2-coordinate geometry to one K, one Zn, and one P atom. In the tenth O site, O is bonded in a distorted bent 150 degrees geometry to one Zn and one P atom. In the eleventh O site, O is bonded in a distorted bent 120 degrees geometry to one K, one Zn, and one P atom. In the twelfth O site, O is bonded in a 2-coordinate geometry to one K, one Zn, and one P atom. In the thirteenth O site, O is bonded in a distorted bent 150 degrees geometry to one K, one Zn, and one P atom. In the fourteenth O site, O is bonded in a 2-coordinate geometry to one K, one Zn, and one P atom. In the fifteenth O site, O is bonded in a distorted water-like geometry to one K and one P atom. In the sixteenth O site, O is bonded in a bent 150 degrees geometry to one Zn and one P atom. In the seventeenth O site, O is bonded in a single-bond geometry to one O atom. The O–O bond length is 1.24 Å. In the eighteenth O site, O is bonded in a single-bond geometry to one K and one Zn atom. In the nineteenth O site, O is bonded in a water-like geometry to one K and one O atom. In the twentieth O site, O is bonded in a water-like geometry to two K atoms.