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The use of X‐ray diffraction in support of calorimetry for the characterization of some nitric acid hydrates possibly involved in the polar stratospheric clouds formation
Author(s) -
Ji K.,
Petit J. C.,
Négrier P.,
Haget Y.
Publication year - 1996
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/96gl00945
Subject(s) - nitric acid , polar , stoichiometry , diffraction , x ray crystallography , chemistry , characterization (materials science) , crystallography , materials science , inorganic chemistry , nanotechnology , physics , optics , astronomy
The use of a Guinier‐Simon device has enabled us, firstly, to obtain the XRD (X‐Ray Diffraction) lines of three stoichiometric hydrates namely NAT, NAD and NAM (Nitric Acid Trihydrate, Nitric Acid Dihydrate, Nitric Acid Monohydrate) secondly, to detect the presence of these hydrates in mixtures and also to determine their formation temperature. The latter information is essential to understand the mechanism of formation of PSC s (Polar Stratospheric Clouds).