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Crystal Structure of Melaminium Orthophosphate from High-Resolution Synchrotron Powder-Diffraction Data

✍ Scribed by Dirk J. A. De Ridder; Kees Goubitz; Vladimir Brodski; René Peschar; Henk Schenk

Publisher
John Wiley and Sons
Year
2004
Tongue
German
Weight
257 KB
Volume
87
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

The crystal structure of melaminium orthophosphate (MP) has been determined from high‐resolution synchrotron powder‐diffraction data. The crystal packing consists of melaminium layers and pairs of orthophosphate chains connected by H‐bonds almost perpendicular to the layers. The distance between melaminium layers is 3.62 Å. Neighboring melaminium molecules do not lie in the same plane, but in two parallel planes at close distance (0.79 Å), and are shifted with respect to each other. The orthophosphate chains are connected by both intra‐chain and inter‐chain H‐bonds. The melamine is singly protonated at an endocyclic N‐atom. The powder‐diffraction data were corroborated by solid‐state NMR experiments.

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