Accession Number : ADA258428


Title :   The Crystal and Molecular Structure of Triethanol-Ammonium Nitrate


Descriptive Note : Technical rept.


Corporate Author : ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER PICATINNY ARSENAL NJ ARMAMENT ENGINEERING DIRECTORATE


Personal Author(s) : Bracuti, A J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a258428.pdf


Report Date : Dec 1992


Pagination or Media Count : 27


Abstract : The liquid propellant used in the 155-mm regenerative liquid propellant gun is XM46 which is a solution of 60% hydroxyl ammonium nitrate (HAN), 20% triethanolammonium nitrate (TEAN), and 20% water. This material exhibits rather unusual liquid properties that have been attributed to its being a 'molten eutectic' of fused salts rather than a normal aqueous solution of two different nitrate salts. A hydrogen-bonded liquid structure for eutectic LP1946 was proposed previously based on the known structures of neat HAN and water and a best-guess estimate of the TEAN structure. To verify this estimate, the molecular structure of neat TEAN was recently determined. This investigation revealed TEAN has very unusual and interesting bifurcated intermolecular and trifurcated intramolecular hydrogen bonding configurations within the crystal. If these hydrogen bonding configurations are retained in aqueous solution, they could be responsible in some part to the observed unusual liquid properties of liquid propellant XM46. Crystal structure, X-ray diffraction, Molecular structure, TEAN, Triethanolammonium nitrate.


Descriptors :   *CRYSTAL STRUCTURE , *MOLECULAR STRUCTURE , *LIQUID PROPELLANT GUNS , *GUN PROPELLANTS , STRUCTURES , X RAY DIFFRACTION , AMMONIUM NITRATE , MOLTEN SALTS , EUTECTICS , NITRATES , SALTS , LIQUID PROPELLANTS , PROPELLANTS , DIFFRACTION


Subject Categories : Organic Chemistry
      Physical Chemistry
      Ammunition and Explosives


Distribution Statement : APPROVED FOR PUBLIC RELEASE