Table 2.

Third acoustic virial coefficients expressed as RTγ_a for ⁴He calculated by PIMC and our estimates of their expanded (k = 2) uncertainties U(C). Also shown are values calculated from the C(T) correlation Eq. (22)

T (K)	RTγa (PIMC) (cm6 · mol−2)	U(RTγa) (cm6 · mol−2)	RTγa (Eq. 22) (cm6 · mol−2)
3	–	–	−13335.
4	–	–	−5250.
5	–	–	−2124.
6	–	–	−681.
7	–	–	57.
8	–	–	458.
9	–	–	682.
10	–	–	807
12	–	–	906.
14	–	–	914.
16	–	–	885.
18	–	–	843.
20	736.	83.	796.
24.5561	715.	51.	695.
30	590.	34.	592.
40	455.	18.	454.
50	366.	12.	360.
63.15	269.9	7.8	276.4
75	222.9	6.0	223.9
83.806	192.9	4.8	193.9
100	152.7	3.3	151.9
120	113.4	2.8	115.4
140	88.0	2.2	89.3
170	62.4	1.8	61.9
200	42.8	1.4	43.1
223.152	32.3	1.2	32.3
235	27.8	1.1	27.6
250	22.5	1.1	22.4
273.16	15.82	0.88	15.61
293.15	10.18	0.93	10.71
302.915	8.18	0.79	8.59
325	3.90	0.75	4.32
350	0.07	0.73	0.25
375	−3.90	0.65	−3.19
400	−6.03	0.57	−6.12
429.75	−9.27	0.52	−9.06
450	−11.39	0.50	−10.79
500	−14.19	0.46	−14.31
550	−17.65	0.40	−17.02
600	−19.31	0.43	−19.12
650	−20.90	0.36	−20.79
700	−21.93	0.34	−22.11
750	−22.93	0.32	−23.17
800	−23.98	0.32	−24.02
900	−25.27	0.26	−25.26
1000	−26.28	0.25	−26.07
1200	−26.99	0.23	−26.87
1400	−27.13	0.21	−27.07
1600	−27.13	0.19	−26.96
1800	−26.77	0.18	−26.68
2000	−26.40	0.17	−26.30
2500	−25.24	0.14	−25.19
5000	−20.27	0.11	−20.25
10000	−14.58	0.09	−14.72