“…The change in volume of the sample in the bellows relative to the volume at some reference pressure, usually atmospheric pressure, as pressure is applied to the system Is a function of the following: the vacuum corrected weight of the sample in the bellows, Wvc; the density of the sample at the reference pressure, p(P0,7); the temperature and pressure corrected cross-sectional area of the bellows, A(P,T)\ and the change in length of the bellows with pressure, ALB(P,T). Appropriate temperature and pressure corrections were applied to ALb(P,T) and A(P,T) to obtain the true compression of the sample as represented by eq 1. k(P,T) = [v(P0,T)~v(P,T)]/v(Pa,T) = ALb(P,T) • A(P, T) • p(Pq, T)/Wvc (1) The quantity [v(P0,T) -v(P,T)]/v(P0,T) = k(P,T) is the compression of the sample where v(P,T) is the specific volume at pressure P and temperature T and v(P0,7) is the specific volume at reference pressure P0 and temperature T. The relative volume is defined by eq 2. v(P,T)/v(Po,T) = 1 -k(P,T)…”