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High‐Temperature High‐Pressure Synthesis of the Highly Condensed Nitridophosphates NaP 4 N 7 , KP 4 N 7 , RbP 4 N 7 , and CsP 4 N 7 and Their Crystal‐Structure Determinations by X‐ray Powder Diffraction
Author(s) -
Landskron Kai,
Irran Elisabeth,
Schnick Wolfgang
Publication year - 1999
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/(sici)1521-3765(19990903)5:9<2548::aid-chem2548>3.0.co;2-w
Subject(s) - high pressure , crystallization , thermal stability , powder diffraction , diffraction , crystal structure , crystallography , x ray crystallography , thermal , materials science , chemistry , thermodynamics , organic chemistry , optics , physics
Novel highly condensed nitridophosphates MP 4 N 7 have been obtained by the reaction of the respective azides MN 3 (M = Na, K, Rb, or Cs) with P 3 N 5 under high‐temperature high‐pressure conditions in a belt apparatus (structure of NaP 4 N 7 depicted). Under normal pressure nitridophosphates as well as P 3 N 5 decompose above 900 °C under evolution of N 2 . However under these specific reaction conditions the thermal stability of the PN compounds has been raised by more than 1000 °C, thus yielding a good crystallization of the products.