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] |
1 | H | 0.53 | 0.25 | 0.37 | 1.20 | 0.10 |
2 | He | 0.31 | 0.31 | 0.32 | 1.40 | |
3 | Li | 1.67 | 1.45 | 1.34 | 1.82 | 0.90 |
4 | Be | 1.12 | 1.05 | 0.90 | 0.41 | |
5 | B | 0.87 | 0.85 | 0.82 | 0.25 | |
6 | C | 0.67 | 0.70 | 0.77 | 1.70 | 0.29 |
7 | N | 0.56 | 0.65 | 0.75 | 1.55 | 0.30 |
8 | O | 0.48 | 0.60 | 0.73 | 1.52 | 1.21 |
9 | F | 0.42 | 0.50 | 0.71 | 1.47 | 1.19 |
10 | Ne | 0.38 | 0.38 | 0.69 | 1.54 | |
11 | Na | 1.90 | 1.80 | 1.54 | 2.27 | 1.16 |
12 | Mg | 1.45 | 1.50 | 1.30 | 1.73 | 0.86 |
13 | Al | 1.18 | 1.25 | 1.18 | 0.53 | |
14 | Si | 1.11 | 1.10 | 1.11 | 2.10 | 0.40 |
15 | P | 0.98 | 1.00 | 1.06 | 1.80 | 0.31 |
16 | S | 0.88 | 1.00 | 1.02 | 1.80 | 0.43 |
17 | Cl | 0.79 | 1.00 | 0.99 | 1.75 | 1.67 |
18 | Ar | 0.71 | 0.71 | 0.97 | 1.88 | |
19 | K | 2.43 | 2.20 | 1.96 | 2.75 | 1.52 |
20 | Ca | 1.94 | 1.80 | 1.74 | 1.14 | |
21 | Sc | 1.84 | 1.60 | 1.44 | 0.89 | |
22 | Ti | 1.76 | 1.40 | 1.36 | 0.75 | |
23 | V | 1.71 | 1.35 | 1.25 | 0.68 | |
24 | Cr | 1.66 | 1.40 | 1.27 | 0.76 | |
25 | Mn | 1.61 | 1.40 | 1.39 | 0.81 | |
26 | Fe | 1.56 | 1.40 | 1.25 | 0.69 | |
27 | Co | 1.52 | 1.35 | 1.26 | 0.54 | |
28 | Ni | 1.49 | 1.35 | 1.21 | 1.63 | 0.70 |
29 | Cu | 1.45 | 1.35 | 1.38 | 1.40 | 0.71 |
30 | Zn | 1.42 | 1.35 | 1.31 | 1.39 | 0.74 |
31 | Ga | 1.36 | 1.30 | 1.26 | 1.87 | 0.76 |
32 | Ge | 1.25 | 1.25 | 1.22 | 0.53 | |
33 | As | 1.14 | 1.15 | 1.19 | 1.85 | 0.72 |
34 | Se | 1.03 | 1.15 | 1.16 | 1.90 | 0.56 |
35 | Br | 0.94 | 1.15 | 1.14 | 1.85 | 1.82 |
36 | Kr | 0.88 | 0.88 | 1.10 | 2.02 | |
37 | Rb | 2.65 | 2.35 | 2.11 | 1.66 | |
38 | Sr | 2.19 | 2.00 | 1.92 | 1.32 | |
39 | Y | 2.12 | 1.85 | 1.62 | 1.04 | |
40 | Zr | 2.06 | 1.55 | 1.48 | 0.86 | |
41 | Nb | 1.98 | 1.45 | 1.37 | 0.78 | |
42 | Mo | 1.90 | 1.45 | 1.45 | 0.79 | |
43 | Tc | 1.83 | 1.35 | 1.56 | 0.79 | |
44 | Ru | 1.78 | 1.30 | 1.26 | 0.82 | |
45 | Rh | 1.73 | 1.35 | 1.35 | 0.81 | |
46 | Pd | 1.69 | 1.40 | 1.31 | 1.63 | 0.78 |
47 | Ag | 1.65 | 1.60 | 1.53 | 1.72 | 1.29 |
48 | Cd | 1.61 | 1.55 | 1.48 | 1.58 | 0.92 |
49 | In | 1.56 | 1.55 | 1.44 | 1.93 | 0.94 |
50 | Sn | 1.45 | 1.45 | 1.41 | 2.17 | 0.69 |
51 | Sb | 1.33 | 1.45 | 1.38 | 0.90 | |
52 | Te | 1.23 | 1.40 | 1.35 | 2.06 | 1.11 |
53 | I | 1.15 | 1.40 | 1.33 | 1.98 | 2.06 |
54 | Xe | 1.08 | 1.08 | 1.30 | 2.16 | 0.62 |
55 | Cs | 2.98 | 2.60 | 2.25 | 1.81 | |
56 | Ba | 2.53 | 2.15 | 1.98 | 1.49 | |
57 | La | 1.95 | 1.95 | 1.69 | 1.36 | |
58 | Ce | 1.85 | 1.85 | 1.15 | ||
59 | Pr | 2.47 | 1.85 | 1.32 | ||
60 | Nd | 2.06 | 1.85 | 1.30 | ||
61 | Pm | 2.05 | 1.85 | 1.28 | ||
62 | Sm | 2.38 | 1.85 | 1.10 | ||
63 | Eu | 2.31 | 1.85 | 1.31 | ||
64 | Gd | 2.33 | 1.80 | 1.08 | ||
65 | Tb | 2.25 | 1.75 | 1.18 | ||
66 | Dy | 2.28 | 1.75 | 1.05 | ||
67 | Ho | 2.26 | 1.75 | 1.04 | ||
68 | Er | 2.26 | 1.75 | 1.03 | ||
69 | Tm | 2.22 | 1.75 | 1.02 | ||
70 | Yb | 2.22 | 1.75 | 1.13 | ||
71 | Lu | 2.17 | 1.75 | 1.60 | 1.00 | |
72 | Hf | 2.08 | 1.55 | 1.50 | 0.85 | |
73 | Ta | 2.00 | 1.45 | 1.38 | 0.78 | |
74 | W | 1.93 | 1.35 | 1.46 | 0.74 | |
75 | Re | 1.88 | 1.35 | 1.59 | 0.77 | |
76 | Os | 1.85 | 1.30 | 1.28 | 0.77 | |
77 | Ir | 1.80 | 1.35 | 1.37 | 0.77 | |
78 | Pt | 1.77 | 1.35 | 1.28 | 1.75 | 0.74 |
79 | Au | 1.74 | 1.35 | 1.44 | 1.66 | 1.51 |
80 | Hg | 1.71 | 1.50 | 1.49 | 1.55 | 0.83 |
81 | Tl | 1.56 | 1.90 | 1.48 | 1.96 | 1.03 |
82 | Pb | 1.54 | 1.80 | 1.47 | 2.02 | 1.49 |
83 | Bi | 1.43 | 1.60 | 1.46 | 1.17 | |
84 | Po | 1.35 | 1.90 | 1.08 | ||
85 | At | 1.27 | 1.27 | 0.76 | ||
86 | Rn | 1.20 | 1.20 | 1.45 | ||
87 | Fr | 1.94 | ||||
88 | Ra | 2.15 | 1.62 | |||
89 | Ac | 1.95 | 1.95 | 1.26 | ||
90 | Th | 1.80 | 1.80 | 1.19 | ||
91 | Pa | 1.80 | 1.80 | 1.09 | ||
92 | U | 1.75 | 1.75 | 1.86 | 0.87 | |
93 | Np | 1.75 | 1.75 | |||
94 | Pu | 1.75 | 1.75 | 1.00 | ||
95 | Am | 1.75 | 1.75 | 1.12 | ||
96 | Cm | 1.11 |