p vs. t

t/°C P/gPa

–38 .83 0 .000
–35 .00 0 .074
–30 .00 0 .171
–25 .00 0 .268
–20 .00 0 .365
–15 .00 0 .463
–10 .00 0 .560

–5 .00 0 .658

0 .00 0 .757
5 .00 0 .856

10 .00 0 .955
15 .00 1 .055
20 .00 1 .156
25 .00 1 .257
30 .00 1 .359

t vs. p

P/gPa t/°C

0 .010 –38 .32
0 .020 –37 .80
0 .050 –36 .25
0 .100 –33 .66
0 .200 –28 .50
0 .300 –23 .35
0 .400 –18 .21
0 .500 –13 .08
0 .600

–7 .97

0 .700

–2 .88

0 .800

2 .18

0 .900

7 .23

1 .000

12 .24

1 .100

17 .23

1 .200

22 .19

MELTINg CURVE OF MERCURY

The solid–liquid phase boundary of mercury provides a conve-

nient means of calibrating pressures up to 1 GPa in the neighbor-

hood of room temperature . The best representation of this curve

is given by:

p/GPa = 1 .932845 • 10

–2

d + 1 .8333 • 10

–6

d

2

+ 5 .9791 • 10

–8

d

3

where d = t/°C – 38 .8344 . Temperature is on the ITS-90 scale, and

the relation is valid for pressures up to about 1 .2 GPa . The follow-

ing table is calculated from this equation .

Reference

Molinar, G . F ., Bean, V ., Houck, J ., and Welch, B ., Metrologia 16, 21, 1980;

28, 353, 1991 .

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