Open AccessA glass capillary cell for in situ powder X‐ray diffraction of condensed volatile compounds. Solid HCFC‐123a and HCFC‐124
Author(s) -
Brunelli Michela,
Fitch Andrew N.
Publication year - 2003
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049503007969
Subject(s) - powder diffraction , synchrotron radiation , capillary action , synchrotron , diffraction , in situ , materials science , x ray crystallography , chemistry , analytical chemistry (journal) , helium , crystallography , chromatography , optics , organic chemistry , composite material , physics
A rotating glass capillary cell with a gas handling system has been built to allow in situ studies by powder X‐ray diffraction. The cell can be used to condense volatile compounds, or to follow solid‐state chemical reactions under vacuum or at gas pressures up to around 7 × 10 5 Pa. Using the cell, cooled by a stream of helium gas, the solid phases of 1,2‐dichlorotrifluoroethane (HCFC‐123a) and 2‐chloro‐1,1,1,2‐tetrafluoroethane (HCFC‐124) have been investigated using powder synchrotron X‐ray radiation. These were found to have disordered hexagonal structures, with a = 4.018 (5), c = 6.553 (1) Å and a = 4.048 (1), c = 6.625 (1) Å, respectively, at 64 K.