Frequency-dependent second hyperpolarizability with dc-Kerr effect γ (−ω;ω,0,0) and electric field induced second harmonic generation (ESHG) γ(−2−ω;ω,ω,0) in ×10⁻⁴⁰ esu at ω = 532 and 1064 nm.

Superalkalis	ω = 0.0856 au (532 nm)		ω = 0.0428 au (1064 nm)
	γ(−ω;ω,0,0)	γ(−2ω;ω,ω,0)	γ(−ω;ω,0,0)	γ(−2ω;ω,ω,0)
Ge 5 AM 3
Ge5Li3 (A)	7.84 × 10−31	1.37 × 10−30	3.39 × 10−34	1.40 × 10−30
Ge5Na3 (B)	1.30 × 10−32	1.64 × 10−31	2.45 × 10−33	2.31 × 10−33
Ge5K3 (C)	5.43 × 10−36	2.52 × 10−29	7.37 × 10−32	2.09 × 10−31
Ge 9 AM 5
Ge9Li5 (D)	1.36 × 10−33	5.74 × 10−32	3.16 × 10−32	1.19 × 10−33
Ge9Na5 (E)	1.76 × 10−29	8.80 × 10−30	1.58 × 10−31	1.03 × 10−32
Ge9K5 (F)	5.23 × 10−32	2.53 × 10−32	2.15 × 10−30	3.76 747 508 × 10−32
Ge 10 AM 3
Ge10Li3 (G)	8.45 × 10−32	1.24 × 10−31	3.24 × 10−40	5.28 × 10−34
Ge10Na3 (H)	1.22 × 10−32	6.84 × 10−34	1.72 × 10−32	2.41 × 10−33
Ge10K3 (I)	5.23 × 10−32	2.53 × 10−32	2.15 × 10−30	3.76 × 10−32