Thermochemical properties of inorganic substances

d~ and dP2~,l 1 ~ (-1)" (4v-2m+2)!~2~-2"d~ 22"~1 m!(2v--m+l}!(2v--2m)~ m=o which yields for P~,,, 1 (cos ,9o) sin 9o " (4 v-2 m + 2) !~.--1 ~ (-l)"(2v_m+l)1(2v_2m)~.c~ 2"0o.m=0