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Title: Equations of state of anhydrous AlF3 and AlI3 : Modeling of extreme condition halide chemistry

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/1.4921896· OSTI ID:1251026
 [1]; ORCiD logo [2];  [2];  [2];  [3];  [2];  [2];  [2];  [2]
  1. Carnegie Inst. of Washington, Washington, DC (United States). Geophysical Lab.; Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Physical and Life Sciences Directorate
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Physical and Life Sciences Directorate
  3. Carnegie Inst. of Washington, Washington, DC (United States). Geophysical Lab.

Pressure dependent angle-dispersive x-ray powder diffraction measurements of alpha-phase aluminum trifluoride (α-AlF3) and separately, aluminum triiodide (AlI3) were conducted using a diamond-anvil cell. Results at 295 K extend to 50 GPa. The equations of state of AlF3 and AlI3 were determined through refinements of collected x-ray diffraction patterns. The respective bulk moduli and corresponding pressure derivatives are reported for multiple orders of the Birch-Murnaghan (B-M), finite-strain (F-f), and higher pressure finite-strain (G-g) EOS analysis models. Aluminum trifluoride exhibits an apparent isostructural phase transition at approximately 12 GPa. Aluminum triiodide also undergoes a second-order atomic rearrangement: applied stress transformed a monoclinically distorted face centered cubic (fcc) structure into a standard fcc structural arrangement of iodine atoms. In conclusion, results from semi-empirical thermochemical computations of energetic materials formulated with fluorine containing reactants were obtained with the aim of predicting the yield of halogenated products.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Defense Advanced Research Projects Agency (DARPA); US Army Research Office (ARO); National Science Foundation (NSF)
Grant/Contract Number:
AC52-07NA27344; W31P4Q1310005; W31P4Q1210008; W911NF-13-1-0231; EAR-0622171; DMR-1231586; FG02-94ER14466; AC02-06CH11357; FP7/2007-2013
OSTI ID:
1251026
Alternate ID(s):
OSTI ID: 1228195
Report Number(s):
LLNL-JRNL-668328
Journal Information:
Journal of Chemical Physics, Vol. 142, Issue 21; ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

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Cited By (1)

Effects of pressure on the structure and lattice dynamics of ammonium perchlorate: A combined experimental and theoretical study journal July 2018