(NH 4 )[B 4 O 5 (PO 4 )] – A Boron Rich Three-Dimensional Borophosphate
Abstract
(NH 4 )[B 4 O 5 (PO 4 )] was obtained as crystalline colorless powder via a solid state reaction in a closed system by using NH 4 H 2 PO 4 and B 2 O 3 at 400 °C under vacuum conditions. Single-crystal X-ray diffraction revealed a new structure type ( Pbca, no. 61, Z = 8, a = 8.1998(19), b = 13.3359(17), c = 13.4682(16) Å, R 1 = 0.0472, w R 2 = 0.1289, 2121 data, 149 parameters). It comprises a three-dimensional anionic framework built up by [PO 4 ], [BO 4 ] and [BO 3 ] units with charge balancing ammonium cations in the resulting one-dimensional channels. It represents only the third three-dimensional (3D) mixed-coordinated borophosphate revealing a new fundamental building unit. The titled compound is characterized by X-ray diffraction and electrostatic calculations. Besides, optical and thermal properties are investigated by FT-IR, UV–vis and thermogravimetry.
Fields of Study & Subjects
Crystal Structures and Properties
Zeolite Catalysis and Synthesis
X-ray Diffraction in Crystallography
Publication details
- Journal / source
- Inorganic Chemistry
- Publisher
- American Chemical Society (ACS)
- Volume
- 65
- Issue
- 7
- Pages
- 4198–4204
- Publication date
- 10 February 2026
- Language
- EN