6.4: Radius
- Page ID
- 371714
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John Moore, Jia Zhou, and Etienne Garand
Atomic Radius
| Atom | Atomic No. | Atomic Radius (pm) |
|---|---|---|
| H | 1 | 37 |
| He | 2 | 31 |
| Li | 3 | 157 |
| Be | 4 | 112 |
| B | 5 | 86 |
| C | 6 | 77 |
| N | 7 | 74 |
| O | 8 | 74 |
| F | 9 | 72 |
| Ne | 10 | 68 |
| Na | 11 | 191 |
| Mg | 12 | 160 |
| Al | 13 | 143 |
| Si | 14 | 117 |
| P | 15 | 110 |
| S | 16 | 104 |
| Cl | 17 | 99 |
| Ar | 18 | 91 |
| K | 19 | 235 |
| Ca | 20 | 197 |
| Sc | 21 | 164 |
| Ti | 22 | 147 |
| V | 23 | 135 |
| Cr | 24 | 129 |
| Mn | 25 | 137 |
| Fe | 26 | 126 |
| Co | 27 | 125 |
| Ni | 28 | 125 |
| Cu | 29 | 126 |
| Zn | 30 | 137 |
| Ga | 31 | 153 |
| Ge | 32 | 130.5 |
| As | 33 | 121 |
| Se | 34 | 117 |
| Br | 35 | 114 |
| Kr | 36 | 108 |
| Rb | 37 | 250 |
| Sr | 38 | 215 |
| Y | 39 | 182 |
| Zr | 40 | 160 |
| Nb | 41 | 147 |
| Mo | 42 | 140 |
| Tc | 43 | 135 |
| Ru | 44 | 134 |
| Rh | 45 | 134 |
| Pd | 46 | 137 |
| Ag | 47 | 144 |
| Cd | 48 | 152 |
| In | 49 | 167 |
| Sn | 50 | 149 |
| Sb | 51 | 151 |
| Te | 52 | 137 |
| I | 53 | 133 |
| Xe | 54 | 126 |
| Cs | 55 | 272 |
| Ba | 56 | 224 |
| La | 57 | 188 |
| Ce | 58 | 182 |
| Pr | 59 | 181 |
| Nd | 60 | 180 |
| Pm | 61 | 179 |
| Sm | 62 | 179 |
| Eu | 63 | 206 |
| Gd | 64 | 178 |
| Tb | 65 | 177 |
| Dy | 66 | 176 |
| Ho | 67 | 175 |
| Er | 68 | 174 |
| Tm | 69 | 173 |
| Yb | 70 | 194 |
| Lu | 71 | 172 |
| Hf | 72 | 159 |
| Ta | 73 | 147 |
| W | 74 | 141 |
| Re | 75 | 137 |
| Os | 76 | 135 |
| Ir | 77 | 136 |
| Pt | 78 | 139 |
| Au | 79 | 144 |
| Hg | 80 | 155 |
| Tl | 81 | 171 |
| Pb | 82 | 175 |
| Bi | 83 | 182 |
| Po | 84 | 174 |
| At | 85 | 166 |
| Rn | 86 | 159 |
| Fr | 87 | |
| Ra | 88 | |
| Ac | 89 | |
| Th | 90 | 180 |
| Pa | 91 | 163 |
| U | 92 | 156 |
| Np | 93 | 156 |
| Pu | 94 | 164 |
| Am | 95 | 173 |
| Cm | 96 | 155 |
| Bk | 97 | 170 |
| Cf | 98 | |
| Es | 99 | |
| Fm | 100 | |
| Md | 101 | |
| No | 102 | |
| Lr | 103 |
Wells, A. F. Structural Inorganic Chemistry, 5th ed., Clarendon: Oxford, 1984, p 289 and 1288.
Slater, J. C. J. Chem. Phys. 1964, 41, 3199.
Clementi, E; Raimondi, D. L.; Reinhardt, W. P. J. Chem. Phys. 1967, 47(4), 1300-1307.
Ionic Radius
| Ion Species | Atomic No. | Ionic Radius (pm) |
|---|---|---|
| H +1 | 1 | |
| He | 2 | |
| Li +1 | 3 | 90 |
| Be +2 | 4 | 59 |
| B +3 | 5 | 41 |
| C +4 | 6 | 30 |
| N -3 | 7 | |
| N +3 | 7 | 30 |
| N +5 | 7 | 27 |
| O -2 | 8 | 126 |
| F -1 | 9 | 119 |
| F +7 | 9 | 22 |
| Ne | 10 | |
| Na +1 | 11 | 116 |
| Mg +2 | 12 | 86 |
| Al +3 | 13 | 67.5 |
| Si +4 | 14 | 54 |
| P +3 | 15 | 58 |
| P +5 | 15 | 52 |
| S -2 | 16 | 170 |
| S +4 | 16 | 51 |
| S +6 | 16 | 43 |
| Cl -1 | 17 | 167 |
| Cl +5 | 17 | |
| Cl +7 | 17 | 41 |
| Ar | 18 | |
| K +1 | 19 | 152 |
| Ca +2 | 20 | 114 |
| Sc +3 | 21 | 88.5 |
| Ti +2 | 22 | 100 |
| Ti +3 | 22 | 81 |
| Ti +4 | 22 | 74.5 |
| V +2 | 23 | 93 |
| V +3 | 23 | 78 |
| V +4 | 23 | 72 |
| V +5 | 23 | 68 |
| Cr +2 | 24 | 94 |
| Cr +3 | 24 | 75.5 |
| Cr +4 | 24 | 69 |
| Cr +5 | 24 | 63 |
| Cr +6 | 24 | 58 |
| Mn +2 | 25 | 97 |
| Mn +3 | 25 | 78.5 |
| Mn +4 | 25 | 67 |
| Mn +5 | 25 | |
| Mn +6 | 25 | |
| Mn +7 | 25 | 60 |
| Fe +2 | 26 | 92 |
| Fe +3 | 26 | 78.5 |
| Fe +4 | 26 | 72.5 |
| Fe +6 | 26 | |
| Co +2 | 27 | 88.5 |
| Co +3 | 27 | 75 |
| Co +4 | 27 | 67 |
| Ni +2 | 28 | 83 |
| Ni +3 | 28 | 74 |
| Ni +4 | 28 | 62 |
| Cu +1 | 29 | 91 |
| Cu +2 | 29 | 87 |
| Cu +3 | 29 | 68 |
| Zn +2 | 30 | 88 |
| Ga +3 | 31 | 76 |
| Ge +2 | 32 | 87 |
| Ge +4 | 32 | 67 |
| As +3 | 33 | 72 |
| As +5 | 33 | 60 |
| Se -2 | 34 | 184 |
| Se +4 | 34 | 64 |
| Se +6 | 34 | 56 |
| Br -1 | 35 | 182 |
| Br +3 | 35 | |
| Br +5 | 35 | |
| Br +7 | 35 | 53 |
| Kr | 36 | |
| Rb +1 | 37 | 166 |
| Sr +2 | 38 | 132 |
| Y +3 | 39 | 104 |
| Zr +4 | 40 | 86 |
| Nb +3 | 41 | 86 |
| Nb +4 | 41 | 82 |
| Nb +5 | 41 | 78 |
| Mo +3 | 42 | 83 |
| Mo +4 | 42 | 79 |
| Mo +5 | 42 | 75 |
| Mo +6 | 42 | 73 |
| Tc +4 | 43 | 78.5 |
| Tc +5 | 43 | 74 |
| Tc +7 | 43 | 70 |
| Ru +3 | 44 | 82 |
| Ru +4 | 44 | 76 |
| Ru +5 | 44 | 70.5 |
| Ru +7 | 44 | |
| Ru +8 | 44 | |
| Rh +3 | 45 | 80.5 |
| Rh +4 | 45 | 74 |
| Rh +5 | 45 | 69 |
| Pd +1 | 46 | |
| Pd +2 | 46 | 100 |
| Pd +3 | 46 | 90 |
| Pd +4 | 46 | 75.5 |
| Ag +1 | 47 | 129 |
| Ag +2 | 47 | 108 |
| Ag +3 | 47 | 89 |
| Cd +2 | 48 | 109 |
| In +3 | 49 | 94 |
| Sn +4 | 50 | 83 |
| Sb +3 | 51 | 90 |
| Sb +5 | 51 | 74 |
| Te -2 | 52 | 207 |
| Te +4 | 52 | 111 |
| Te +6 | 52 | 70 |
| I -1 | 53 | 206 |
| I +5 | 53 | |
| I +7 | 53 | 67 |
| Xe +8 | 54 | 62 |
| Cs +1 | 55 | 181 |
| Ba +2 | 56 | 149 |
| La +3 | 57 | 117.2 |
| Ce +3 | 58 | 115 |
| Ce +4 | 58 | 101 |
| Pr +3 | 59 | 113 |
| Pr +4 | 59 | 99 |
| Nd +2 | 60 | |
| Nd +3 | 60 | 112.3 |
| Pm +3 | 61 | 111 |
| Sm +2 | 62 | |
| Sm +3 | 62 | 109.8 |
| Eu +2 | 63 | 131 |
| Eu +3 | 63 | 108.7 |
| Gd +3 | 64 | 107.8 |
| Tb +3 | 65 | 106.3 |
| Tb +4 | 65 | 90 |
| Dy +2 | 66 | 121 |
| Dy +3 | 66 | 105.2 |
| Ho +3 | 67 | 104.1 |
| Er +3 | 68 | 103 |
| Tm +2 | 69 | 117 |
| Tm +3 | 69 | 102 |
| Yb +2 | 70 | 116 |
| Yb +3 | 70 | 100.8 |
| Lu +3 | 71 | 100.1 |
| Hf +4 | 72 | 85 |
| Ta +3 | 73 | 86 |
| Ta +4 | 73 | 82 |
| Ta +5 | 73 | 78 |
| W +4 | 74 | 80 |
| W +5 | 74 | 76 |
| W +6 | 74 | 74 |
| Re +4 | 75 | 77 |
| Re +5 | 75 | 72 |
| Re +6 | 75 | 69 |
| Re +7 | 75 | 67 |
| Os +4 | 76 | 77 |
| Os +5 | 76 | 71.5 |
| Os +6 | 76 | 68.5 |
| Os +7 | 76 | 66.5 |
| Os +8 | 76 | |
| Ir +3 | 77 | 82 |
| Ir +4 | 77 | 76.5 |
| Ir +5 | 77 | 71 |
| Pt +2 | 78 | 94 |
| Pt +4 | 78 | 76.5 |
| Pt +5 | 78 | 71 |
| Au +1 | 79 | 151 |
| Au +3 | 79 | 99 |
| Au +5 | 79 | 71 |
| Hg +1 | 80 | 133 |
| Hg +2 | 80 | 116 |
| Tl +1 | 81 | 164 |
| Tl +3 | 81 | 102.5 |
| Pb +2 | 82 | 133 |
| Pb +4 | 82 | 91.5 |
| Bi +3 | 83 | 117 |
| Bi +5 | 83 | 90 |
| Po +4 | 84 | 108 |
| Po +6 | 84 | 81 |
| At +7 | 85 | 76 |
| Rn | 86 | |
| Fr +1 | 87 | 194 |
| Ra +2 | 88 | |
| Ac+3 | 89 | 126 |
| Th +4 | 90 | 108 |
| Pa +3 | 91 | 118 |
| Pa +4 | 91 | 104 |
| Pa +5 | 91 | 92 |
| U +3 | 92 | 116.5 |
| U +4 | 92 | 103 |
| U +5 | 92 | 90 |
| U +6 | 92 | 87 |
| Np +2 | 93 | 124 |
| Np +3 | 93 | 115 |
| Np +4 | 93 | 101 |
| Np +5 | 93 | 89 |
| Np +6 | 93 | 86 |
| Np +7 | 93 | 85 |
| Pu +3 | 94 | 114 |
| Pu +4 | 94 | 100 |
| Pu +5 | 94 | 88 |
| Pu +6 | 94 | 85 |
| Am +2 | 95 | |
| Am +3 | 95 | 111.5 |
| Am +4 | 95 | 99 |
| Cm +3 | 96 | 111 |
| Cm +4 | 96 | 99 |
| Bk +3 | 97 | 110 |
| Bk +4 | 97 | 97 |
| Cf +3 | 98 | 109 |
| Cf +4 | 98 | 96.1 |
| Es | 99 | |
| Fm | 100 | |
| Md | 101 | |
| No +2 | 102 | 124 |
| Lr | 103 |
Shannon, R. D. Acta Cryst. 1976, A32, 751-767.