MH₄P₆N₁₂ (M=Mg, Ca): New Imidonitridophosphates with an Unprecedented Layered Network Structure Type

Abstract

Isotypic imidonitridophosphates MH4P6N12 (M = Mg, Ca) have been synthesized by high-pressure/high-temperature reactions at 8 GPa and 1000 °C starting from stoichiometric amounts of the respective alkaline-earth metal nitrides, P3N5, and amorphous HPN2. Both compounds form colorless transparent platelet crystals. The crystal structures have been solved and refined from single-crystal X-ray diffraction data. Rietveld refinement confirmed the accuracy of the structure determination. In order to quantify the amounts of H atoms in the respective compounds, quantitative solid-state (1)H NMR measurements were carried out. EDX spectroscopy confirmed the chemical compositions. FTIR spectra confirmed the presence of NH groups in both structures. The crystal structures reveal an unprecedented layered tetrahedral arrangement, built up from all-side vertex-sharing PN4 tetrahedra with condensed dreier and sechser rings. The resulting layers are separated by metal atoms.

Recent progress in luminescence tuning of Ce3+and Eu2+-activated phosphors for pc-WLEDs

“…Therefore, modifying the current Pc-WLED phosphors or developing newly efficient phosphors for application in WLEDs by this strategy is necessary. [142][143][144][145][146][147][148] Thus, more highly efficient phosphors might be developed for WLED applications. 15 (right) can be predicted to realize spectral tuning based on a similar principle to that in (1)-(4) types.…”

Li+ Ion Conductors with Adamantane‐Type Nitridophosphate Anions β‐Li10P4N10 and Li13P4N10X3 with X=Cl, Br

“…The incorporation of stoichiometrica mountso fh ydrogen would have led to NÀHa bsorption bands, as seen for MH 4 P 6 N 12 (M = Mg, Ca) or HP 4 N 7 . [9,43] …”

Nitridophosphate – eine Erfolgsgeschichte der Nitridsynthese

“…[61,70] Eine noch hçher kondensierte Schichtverbindung mit dreifach-verbrückenden N [3] -Atomen ist das SrP 8 N 14 mit k = 4/7 (Abbildung 11 b). [61,70] Eine noch hçher kondensierte Schichtverbindung mit dreifach-verbrückenden N [3] -Atomen ist das SrP 8 N 14 mit k = 4/7 (Abbildung 11 b).…”

“…[29] Verbindungen, die mit Groß-Volumen-Pressen hergestellt wurden, fallen oft als mikrokristalline und anfänglich mehrphasige Proben an, was die Strukturaufklärung erschwert. [61,66,70,75,76] Vermutlich katalysiert das dabei in situ gebildete HCl das reversible Lçsen und Knüpfen von Bindungen. B. anhand von b-HPN 2 ,M H 4 P 6 N 12 (M = Mg, Ca, Sr), SrP 3 N 5 NH und den MP 2 N 4 -Phasen (M = Ca, Sr, Ba) gezeigt wurde (siehe Abschnitte 2u nd 3).…”