Accession Number : ADA017678

Title :   Lattice Dynamics in Ammonium Perchlorate.

Descriptive Note : Annual rept.,


Personal Author(s) : Brill,Thomas B.

Report Date : 20 OCT 1975

Pagination or Media Count : 32

Abstract : The breakdown of the crystal lattice of ammonium perchlorate in the 300-625 K range has been studied by laser Raman spectroscopy. Detailed examination of the external and internal modes of the ion reveals that the onset of essentially unhindered tumbling of the ClO4(-) ion seems to be intimately tied to the decomposition of AP. The effect of K(+) as an isomorphous dopant in the crystal lattice is to permit the ClO4(-) ion to tumble at a lower temperature (0.8% K(+) produces a 60-70 K lowering in the tumbling temperature) and thus decompose at a lower temperature. Pressure effects on AP at 300 K show normal behavior and we do not believe that pressure plays a very large role in the decomposition of the crystal. All vibrational modes found in ammonium perchlorate including several not here-to-fore reported are discussed and insofar as possible assigned.

Descriptors :   *Ammonium perchlorate, *Solid propellants, *Crystal lattices, *Oxidizers, *Crystal structure, *Raman spectroscopy, Lasers, Decomposition, Crystal defects, Stresses, Impurities, Temperature, Pressure

Subject Categories : Inorganic Chemistry
      Ammunition and Explosives
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE