Table 5.

Third acoustic virial coefficient for ⁴He and its expanded (k = 2) uncertainty from the data of Grimsrud and Werntz [26] and from Plumb and Cataland [27]

T K	RTγa cm6·mol−2	U(RTγa) cm6·mol−2
Grimsrud and Werntz [26]
3.816	−7100	440
3.595	−9300	700
3.379	−14800	790
3.337	−10600	3000
3.182	−15000	1400
2.978	−16400	1300
2.671	−19500	4300
2.13	−46000	7500
Plumb and Cataland [27]
20	770	400
18.9	840	560
18	1180	240
17	1070	270
16	940	190
15	1140	260
14.6	1260	160
14	1070	210
13	1050	100
12	820	140
10.9	970	110
9.9	854	75
9	780	170
8.1	190	300
7	30	530
6.1	−990	260
4.2	−4740	910
3.2	−12400	1800
5	1400	5100