Table A3.

Measured diffusivities for rare-earth elements in aluminum (data calculated are indicated).

Element	Group−Period	Pre−Exponential, Do	Activation Enthalpy, Q		D at 500 °C (773 K)	Temp Range, °C	Reference
-	-	m2s−1	kJmol−1	eVatom−1	m2s−1	-	-
Sc	3−3	1.90 × 10−4	164 ± 9	1.7 ± 0.09	1.57 × 10−15	300−400	[99]
		7.2 ± 6.0 × 10−4	176 ± 9	1.92 ± 0.09	9.20 × 10−16	400−450	[41]
		5.31 × 10−4	173	1.79	1.1 × 10−15	540−655	[178,179]
		2.34 ± 2.16 × 10−4	167 ± 6	1.73 ± 0.06	1.37 × 10−15	475,550,625	[180]
		2.65 ± 0.84 × 10−4 (*)	168 ± 2	1.74 ± 0.02	1.17 × 10−15	-	[180]
		5.0 × 10−5	165.9	1.72	3.08 × 10−16	Calculated	[36]
La	Lan	1.3 × 10−10	113.0	1.17	3.00 × 10−18	-	[39]
Ce	Lan	1.89 × 10−10	111.3	1.15	5.69 × 10−18	450−630	[39]
		4.0 × 10−9	130.2	1.35	6.3 × 10−18	Calculated	[181]
Pr	Lan	3.58 × 10−11	99.9	1.04	6.35 × 10−18	520−630	[39]
Nd	Lan	4.80 × 10−11	105.0	1.08	3.85 × 10−18	450−630	[39]
Sm	Lan	3.45 × 10−11	95.7	0.99	1.18 × 10−17	-	[39]

(*) results of combining measurements in [157,180] with literature data.