Table 4:
Polycrystalline aluminum,a Ref. [3].
Element
v
(Hz)
v
c
(Hz)
q
S
(µm)
P
1315
1322
1
1.11
Si
1435
1458
1
1.11
Rb
1940
1916
2
1.10
Fe
2890
2932
2
1.11
Ti
3500
3421
2
1.09
a
Chemical analysis: Fe, Si, Cu <0.002%