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SrH 4 P 6 N 12 and SrP 8 N 14 : Insights into the Condensation Mechanism of Nitridophosphates under High Pressure
Author(s) -
Wendl Sebastian,
Schnick Wolfgang
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201803125
Subject(s) - stoichiometry , crystallography , crystal structure , rietveld refinement , amorphous solid , powder diffraction , high pressure , materials science , diffraction , spectroscopy , infrared spectroscopy , fourier transform infrared spectroscopy , x ray crystallography , chemistry , chemical engineering , thermodynamics , physics , organic chemistry , quantum mechanics , optics , engineering
The (imido)nitridophosphates SrH 4 P 6 N 12 and SrP 8 N 14 were synthesized as colorless crystals by high‐pressure/high‐temperature reactions using the multianvil technique (5 GPa, ca. 1075 °C). Stoichiometric amounts of Sr(N 3 ) 2, P 3 N 5 , and amorphous HPN 2 were used as starting materials. Whereas the crystal structure of SrH 4 P 6 N 12 was solved and refined from single‐crystal X‐ray diffraction data and confirmed by Rietveld refinement, the structure of SrP 8 N 14 was determined from powder diffraction data. In order to confirm the structures, 1 H and 31 P solid‐state NMR spectroscopy and FTIR spectroscopy were carried out. The chemical composition was confirmed with EDX measurements. Both compounds show unprecedented layered network structure types, built up from all‐side vertex‐sharing PN 4 tetrahedra which are structurally related. The structural comparison of both compounds gives first insights into the hitherto unknown condensation mechanism of nitridophosphates under high pressure.