
%0 Journal Article
%A Cohen, LH 
%A Klement, Jr W 
%T Differential thermal analyses of solid-solid transitions in AgNO<sub>3</sub> under hydrostatic pressures to 0.7 Gpa
%J Australian Journal of Chemistry
%D 1981/09/01
%V 34
%N 9
%P 1845-1851
%K 
%R https://doi.org/10.1071/CH9811845
%U https://www.publish.csiro.au/paper/CH9811845 
%X Differential thermal analyses have located the transitions between low-temperature I and high-temperature II phases in AgNO3 powder and single crystals under hydrostatic pressures </~0.7 GPa, with heating/cooling rates in the range 0.1-1.5 K s-1. Isobaric transition temperatures plot linearly against heating/cooling rates and, extrapolated to zero rate, show hystereses between I &#8594; II and II &#8594; I transition temperatures which are comparable with the 'regions of indifference' of Bridgman's isothermal experiments. The present results suggest an initial slope of -0.090 &#956;K Pa-1 and zero initial curvature for the I-II phase boundary. Greater hystereses are observed for the I-II transitions near intersection with the II-II' &#955; transition at </~0.7 GPa. An improved, quantitative description is achieved for the Kennedy-Schultz data on the linear growth rates of II,II? &#8594; I at 0.1 MPa. For II' (with ordered NO3- ions) &#8594; I the growth rates show temperature dependence markedly different than growth rates for II(with disordered NO3-) &#8594; 1 and I &#8594; II. 
