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Hexagonal ammonium zinc phosphate, (NH4)ZnPO4, at 10 K
W T Harrison1, A N Sobolev, M L Phillips
1Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, Scotland. w.harrison@abdn.ac.uk
Summary
This study details the crystal structure of ammonium zinc phosphate hexahydrate, (NH(4))ZnPO(4)-HEX. It features a 3D framework of zinc and phosphate tetrahedra linked by Zn-O-P bonds.
Area of Science:
- Inorganic Chemistry
- Crystallography
- Materials Science
Background:
- Understanding the structural properties of metal phosphates is crucial for developing new materials.
- Ammonium-containing compounds offer unique hydrogen bonding capabilities.
Purpose of the Study:
- To elucidate the detailed crystal structure of (NH(4))ZnPO(4)-HEX.
- To analyze the bonding and structural features of the inorganic framework and extra-framework cations.
Main Methods:
- Single-crystal X-ray diffraction was employed to determine the crystal structure.
- Analysis of bond lengths, bond angles, and atomic coordination.
Main Results:
- The compound features a three-dimensional framework constructed from ZnO(4) and PO(4) tetrahedra.
- Zn-O-P links form the framework, with an average bond angle of 133.47 degrees.
- An undisordered, linear Zn-O-P bond was observed lying on a threefold axis.
- Extra-framework ammonium (NH(4)(+)) cations are present and interact with the framework via hydrogen bonds.
Conclusions:
- The crystal structure of (NH(4))ZnPO(4)-HEX is characterized by a robust 3D inorganic framework.
- Hydrogen bonding interactions between ammonium cations and the framework play a significant role in stabilizing the overall structure.