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6.4: Radius

  • Page ID
    371714
    • John Moore, Jia Zhou, and Etienne Garand
    • University of Wisconsin

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    Radius

    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.


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