表 3 经验参数值

	R0	N	B	R0	N	B	R0	N	B
H	0.87	2.2		Be	1.374		0.38	Li	1.292		0.48
B	1.366		0.37	C	1.37	4.4		N	1.43	4.0
Na	1.661		0.44		1.40		0.26		1.41		0.39
Mg	1.636		0.42	Al	1.644		0.38	Si	1.63		0.36
P	1.62		0.36	Cl(VII)	1.622	4.7		S(VI)	1.614		0.36
K	2.276	9.1		S(IV)	1.629	4.6		Ca	1.09	5.4
	1.84		0.48	Sc	1.865	5.4			1.896		0.41
Ti(IV)	1.806	5.2			1.877		0.35	V(V)	1.791	5.1
	1.78		0.43	Ti(III-IV)	1.823		0.324		1.81		0.34
V(IV-V)	1.770	5.2		V(III-V)	1.790		0.319	Cr(VI)	1.787	5.0
Cr(III-VI)	1.772		0.315	Cr(V)	1.769	5.2		Cr(IV)	1.770	5.2
Cr(III)	1.733	5.2		Mn(VII)	1.780	5.43		Mn(IV)	1.774	5.2
Mn(III)	1.769	5.5		Mn(II)	1.798	5.6		Fe(III)	1.780	5.7
Fe(II)	1.764	5.5		Co(IV)	1.770	5.7		Co(II)	1.727	5.6
Ni(II)	1.680	5.4		Cu(II)	1.718	6.0		Zn(II)	1.675		0.39
Ga(III)	1.73		0.38	Ge(IV)	1.75		0.33	As(V)	1.77		0.41
Se(VI)	1.775	5.0		Rb	2.22	7.0		Se(IV)	1.796	4.0
Sr	2.143	7.0		Y(III)	2.070	7.0		Zr(IV)	1.950	6.0
Nb(V)	1.907	5.0			2.047		0.34	Zr(III-IV)	1.962		0.326
Nb(III-V)	1.921		0.319	Mo(II-VI)	1.882	6.0		Mo(III-VI)	1.890		0.314
Mo(VI)	1.90		0.33	Ag(I)	1.946	7.4		Mo(II)	1.835	5.0
Cd	1.990	7.4		In(III)	1.959	7.0		Sb(V)	1.911	6.0
Sb(II)	1.910	4.5		Sn(IV)	1.955	8.1		Sn(II)	1.860	4.5
Te(VI)	1.911	7.0		Te(IV)	1.933	4.5		I(VII)	1.942	5.8
I(V)	1.967	4.5		Xe(VI)	1.971	4.5		Cs	2.335	6.6
Ba	2.297	7.0		La(III)	2.167	6.5		Ce(IV)	2.117		0.326
Pr(IV)	2.099		0.325		2.200		0.339	Ce(III)	2.160	6.5
Pr(III)	2.150	6.5		Nd(III)	2.137	6.5		Pm(III)	2.120	6.5
Sm(III)	2.107	6.5		Eu(III)	2.090	6.5		Gd(III)	2.077	6.5
Tb(IV)	2.017		0.323	Tb(III)	2.065	6.5		Dy(III)	2.053	6.5
Ho(III)	2.041	6.5		Er(III)	2.029	6.5		Tm(III)	2.020	6.5
Yb(III)	2.012	6.5		Lu(III)	2.004	6.5		Hf(IV)	1.955		0.325
Ta(V)	1.907	5.0		W(VI)	1.904	6.0		Ta(III-V)	1.918		0.318
W(III-VI)	1.898		0.315	Re(VII)	1.910	6.0		Hg(II)	1.983	6.5
T1(III)	2.000	6.0		T1(I)	2.100	6.0		Pb(II)	2.044	5.5
Bi(III)	2.010	5.0		Ac(III)	2.29		0.35	Th(IV)	2.181		0.35
Pa(V)	2.11		0.35	U(VI)	2.059	4.3		Pa(IV)	2.147		0.35
U(V)	2.10		0.35	U(IV)	2.126		0.35	Np(VII)	2.06		0.35
Np(VI)	2.07		0.35	Np(V)	2.09		0.35	Np(IV)	2.11		0.35
Pu(VII)	2.05		0.35	Pu(NI)	2.06		0.35	Pu(V)	2.08		0.35
Pu(IV)	2.094		0.35	Pu(III)	2.142		0.35	Am(VI)	2.05		0.35
Am(V)	2.07		0.35	Am(IV)	2.083		0.35	Am(III)	2.131		0.35
Cm(IV)	2.077		0.35	Cm(III)	2.117		0.35	Bk(IV)	2.067		0.35
Bk(III)	2.103		0.35	Cf(IV)	2.056		0.35	Cf(III)	2.089		0.35
Es(III)	2.075		0.35

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