[Zurück]

H. Tizek, E. Knözinger, H. Grothe:
"Formation and Phase Distribution of Nitric Acid Hydrates in the Mole Fraction Range xHNO₃ < 0.25: a combined XRD and IR study";
Physical Chemistry Chemical Physics, 6 (2004), S. 972 - 979.

Liquid binary nitric acid/water aerosols (x<0.25) were shock- frozen(quenched) into X-ray amorphous solids at 35 K. Careful thermal treatment in the temperature interval 35 K<T<255 K provided the equilibrium phases ice and β-nitric acid trihydrate (β-NAT) as well as the non-equilibrium phases α-NAT, α-nitric acid dihydrate (α-NAD), and nitric acid pentahydrate (NAP, ?). The stability conditions with respect to temperature and composition were determined by X-ray diffraction (XRD) and infrared spectroscopy. In the case of a-NAT they signifcantly depend on the simultaneous presence of ice such that they overlap with the respective stratospheric conditions.

http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC04969086

http://pubs.rsc.org/ej/CP/2004/b310672a.pdf?&Yr=2004&VOLNO=%26nbsp%3B%3Cb%3E6%3C%2Fb%3E&Fp=972&Ep=979&JournalCode=CP&Iss=5