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1""" Van der Waals radii in [A] taken from
2http://www.webelements.com/periodicity/van_der_waals_radius/
3and the references given there.
4Additional source 5 from http://de.wikipedia.org/wiki/Van-der-Waals-Radius
61. A. Bondi, J. Phys. Chem., 1964, 68, 441.
82. L. Pauling, The Nature of the Chemical Bond,
9 Cornell University Press, USA, 1945.
113. J.E. Huheey, E.A. Keiter, and R.L. Keiter in Inorganic Chemistry
12 Principles of Structure and Reactivity, 4th edition, HarperCollins,
13 New York, USA, 1993.W.W. Porterfield in Inorganic chemistry,
14 a unified approach, Addison Wesley Publishing Co.,
15 Reading Massachusetts, USA, 1984.
174. A.M. James and M.P. Lord in Macmillan's Chemical and Physical Data,
18 Macmillan, London, UK, 1992.
205. Manjeera Mantina, Adam C. Chamberlin, Rosendo Valero,
21 Christopher J. Cramer, Donald G. Truhlar Consistent van der Waals Radii
22 for the Whole Main Group. In J. Phys. Chem. A. 2009, 113, 5806–5812,
23 doi:10.1021/jp8111556
25"""
27import numpy as np
29vdw_radii = np.array([
30 np.nan, # X
31 1.20, # H
32 1.40, # He [1]
33 1.82, # Li [1]
34 1.53, # Be [5]
35 1.92, # B [5]
36 1.70, # C [1]
37 1.55, # N [1]
38 1.52, # O [1]
39 1.47, # F [1]
40 1.54, # Ne [1]
41 2.27, # Na [1]
42 1.73, # Mg [1]
43 1.84, # Al [5]
44 2.10, # Si [1]
45 1.80, # P [1]
46 1.80, # S [1]
47 1.75, # Cl [1]
48 1.88, # Ar [1]
49 2.75, # K [1]
50 2.31, # Ca [5]
51 np.nan, # Sc
52 np.nan, # Ti
53 np.nan, # V
54 np.nan, # Cr
55 np.nan, # Mn
56 np.nan, # Fe
57 np.nan, # Co
58 1.63, # Ni [1]
59 1.40, # Cu [1]
60 1.39, # Zn [1]
61 1.87, # Ga [1]
62 2.11, # Ge [5]
63 1.85, # As [1]
64 1.90, # Se [1]
65 1.85, # Br [1]
66 2.02, # Kr [1]
67 3.03, # Rb [5]
68 2.49, # Sr [5]
69 np.nan, # Y
70 np.nan, # Zr
71 np.nan, # Nb
72 np.nan, # Mo
73 np.nan, # Tc
74 np.nan, # Ru
75 np.nan, # Rh
76 1.63, # Pd [1]
77 1.72, # Ag [1]
78 1.58, # Cd [1]
79 1.93, # In [1]
80 2.17, # Sn [1]
81 2.06, # Sb [5]
82 2.06, # Te [1]
83 1.98, # I [1]
84 2.16, # Xe [1]
85 3.43, # Cs [5]
86 2.49, # Ba [5]
87 np.nan, # La
88 np.nan, # Ce
89 np.nan, # Pr
90 np.nan, # Nd
91 np.nan, # Pm
92 np.nan, # Sm
93 np.nan, # Eu
94 np.nan, # Gd
95 np.nan, # Tb
96 np.nan, # Dy
97 np.nan, # Ho
98 np.nan, # Er
99 np.nan, # Tm
100 np.nan, # Yb
101 np.nan, # Lu
102 np.nan, # Hf
103 np.nan, # Ta
104 np.nan, # W
105 np.nan, # Re
106 np.nan, # Os
107 np.nan, # Ir
108 1.75, # Pt [1]
109 1.66, # Au [1]
110 1.55, # Hg [1]
111 1.96, # Tl [1]
112 2.02, # Pb [1]
113 2.07, # Bi [5]
114 1.97, # Po [5]
115 2.02, # At [5]
116 2.20, # Rn [5]
117 3.48, # Fr [5]
118 2.83, # Ra [5]
119 np.nan, # Ac
120 np.nan, # Th
121 np.nan, # Pa
122 1.86, # U [1]
123 np.nan, # Np
124 np.nan, # Pu
125 np.nan, # Am
126 np.nan, # Cm
127 np.nan, # Bk
128 np.nan, # Cf
129 np.nan, # Es
130 np.nan, # Fm
131 np.nan, # Md
132 np.nan, # No
133 np.nan]) # Lr
134vdw_radii.flags.writeable = False