Table of Atomic Radii

The following table contains some of the atomic radius data used by CrystalMaker. This is a brief summary of a far more extensive body of work - please see the notes at the end of this page for more information.

Atomic
Number
Element
Symbol
Atomic
Radius [Å]
Ionic
Radius [Å]
Covalent
Radius [Å]
Van-der-Waals
Radius [Å]
"Crystal"
Radius [Å]
1H 0.530.250.371.200.10
2He0.310.310.321.40
3Li1.671.451.341.820.90
4Be1.121.050.90 0.41
5B 0.870.850.820.25
6C 0.670.700.771.700.29
7N 0.560.650.751.550.30
8O 0.480.600.731.521.21
9F 0.420.500.711.471.19
10Ne0.380.380.691.54
11Na1.901.801.542.271.16
12Mg1.451.501.301.730.86
13Al1.181.251.180.53
14Si1.111.101.112.100.40
15P 0.981.001.061.800.31
16S 0.881.001.021.800.43
17Cl0.791.000.991.751.67
18Ar0.710.710.971.88
19K 2.432.201.962.751.52
20Ca1.941.801.741.14
21Sc1.841.601.440.89
22Ti1.761.401.360.75
23V 1.711.351.250.68
24Cr1.661.401.270.76
25Mn1.611.401.390.81
26Fe1.561.401.250.69
27Co1.521.351.260.54
28Ni1.491.351.211.630.70
29Cu1.451.351.381.400.71
30Zn1.421.351.311.390.74
31Ga1.361.301.261.870.76
32Ge1.251.251.220.53
33As1.141.151.191.850.72
34Se1.031.151.161.900.56
35Br0.941.151.141.851.82
36Kr0.880.881.102.02
37Rb2.652.352.111.66
38Sr2.192.001.921.32
39Y 2.121.851.621.04
40Zr2.061.551.480.86
41Nb1.981.451.370.78
42Mo1.901.451.450.79
43Tc1.831.351.560.79
44Ru1.781.301.260.82
45Rh1.731.351.350.81
46Pd1.691.401.311.630.78
47Ag1.651.601.531.721.29
48Cd1.611.551.481.580.92
49In1.561.551.441.930.94
50Sn1.451.451.412.170.69
51Sb1.331.451.380.90
52Te1.231.401.352.061.11
53I 1.151.401.331.982.06
54Xe1.081.081.302.160.62
55Cs2.982.602.251.81
56Ba2.532.151.981.49
57La1.951.951.691.36
58Ce1.851.85 1.15
59Pr2.471.85 1.32
60Nd2.061.85 1.30
61Pm2.051.85 1.28
62Sm2.381.85 1.10
63Eu2.311.85 1.31
64Gd2.331.80 1.08
65Tb2.251.75 1.18
66Dy2.281.75 1.05
67Ho2.261.75 1.04
68Er2.261.75 1.03
69Tm2.221.75 1.02
70Yb2.221.75 1.13
71Lu2.171.751.601.00
72Hf2.081.551.500.85
73Ta2.001.451.380.78
74W 1.931.351.460.74
75Re1.881.351.590.77
76Os1.851.301.280.77
77Ir1.801.351.370.77
78Pt1.771.351.281.750.74
79Au1.741.351.441.661.51
80Hg1.711.501.491.550.83
81Tl1.561.901.481.961.03
82Pb1.541.801.472.021.49
83Bi1.431.601.46 1.17
84Po1.351.90 1.08
85At1.271.27 0.76
86Rn1.201.201.45
87Fr 1.94
88Ra 2.15 1.62
89Ac1.951.95 1.26
90Th1.801.80 1.19
91Pa1.801.80 1.09
92U1.751.75 1.860.87
93Np1.751.75
94Pu1.751.75 1.00
95Am1.751.75 1.12
96Cm 1.11