各元素の、結晶半径 (Crysatal radius) およびイオン半径 (Ionic radius) の一覧を掲載します。このデータは Shannon, R. D., Acta Crystallogr. A32, 751, 1976. の引用です。細かい表記の意味は原著論文を参考にしてください。

SQ: Square planar coordination
PY: Pyramidal coordination

R: From r3 vs. V plots
C: Calculated from bond length-bond strength equations.
E: Estimated from one or more plots of r vs. valence, r vs. CN, and r vs. cell volume.

?: Doubtful
*: Most reliable
A: Ahrens (1952) ionic radius
P: Pauling’s (1960) crystal radius
M: From a compound having metallic conductivity.

 なお、Shannonのイオン半径はすべての価数や配位数に対して与えられているわけではありません。最近では、機械学習によるイオン半径の推定も行われています。興味のある方はこちらをご覧ください。

ElementValenceCoordinationCrystal radiusIonic radiusOrbitNote
1H+1-0.24-0.381s0
2-0.04-0.18
2He
3Li+140.730.591s2*
60.900.76*
81.060.92C
4Be+230.300.161s2
40.410.27*
60.590.45C
5B+330.150.011s2*
40.250.11*
60.410.27C
6C+430.06-0.081s2C
40.290.15P
60.300.16A
7N-341.321.462p6
+360.300.162s2A
+530.044-0.1041s2
60.270.13A
8 O-221.211.352p6
31.221.36
41.241.38
61.261.40
81.281.42
9F-121.1451.2852p6
31.161.30
41.171.31
61.191.33
760.220.081s2A
10Ne2p6
11Na+141.130.992p6
51.141.00
61.161.02
71.261.12
81.321.18
91.381.24C
121.531.39
12Mg+240.710.572p6
50.800.66
60.860.72*
81.030.89C
13Al+340.530.392p6*
50.620.48
60.6750.535R*
14Si+440.400.262p6*
60.540.40R*
15P+360.580.443s2A
+540.310.172p6*
50.430.29
60.520.38C
16S-261.701.843p6P
+460.510.373s2A
+640.260.122p6*
60.430.29C
17Cl-161.671.813p6P
+53PY0.260.123s2
+740.220.082p6*
60.410.27A
18Ar3p6
19K+141.511.373p6
61.521.38
71.601.46
81.651.51
91.691.55
101.731.59
121.781.64
20Ca+261.141.003p6
71.201.06*
81.261.12*
91.321.18
101.371.23C
121.481.34C
21Sc+360.8850.7453p6R*
81.010.87R*
22Ti+261.000.863d2E
+360.810.673d1R*
+440.560.423p6C
50.650.51C
60.7450.605R*
80.880.74C
23V+260.930.793d3
+360.780.643d2R*
+450.670.533d1
60.720.58R*
80.860.72E
+540.4950.3553p6R*
50.600.46*
60.680.54
24Cr+260.870.733d4E
60.940.80R
+360.7550.6153d3R*
+440.550.413d2
60.690.55R
+540.4850.3453d1R
60.630.49ER
80.710.57
+640.400.263p6
60.580.44C
25Mn+240.800.663d5
50.890.75C
60.810.67E
60.970.83R*
71.040.90C
81.100.96R
+350.720.583d4
60.720.58R
60.7850.645R*
+440.530.393d3R
60.670.53R*
+540.470.333d2R
+640.3950.2553d1
+740.390.253p6
60.600.46A
26Fe+240.770.633d6
4SQ0.780.64
60.750.61E
60.920.78R*
81.060.92C
+340.630.493d5*
50.720.58
60.690.55R
60.7850.645R*
80.920.78
+460.7250.5853d4R
+640.390.253d2R
27Co+240.720.583d7
50.810.67C
60.790.65R
60.8850.745R*
81.040.90
+360.6850.5453d6R*
60.750.61
+440.540.43d5
60.670.53R
28Ni+240.690.553d8
4SQ0.630.49
50.770.63E
60.830.69R*
+360.700.563d7R*
60.740.60E
+460.620.483d6R
29Cu+120.600.463d10
40.740.6E
60.910.77E
+240.710.573d9
4SQ0.710.57*
50.790.65*
60.870.73
+360.680.543d8
30Zn+240.740.603d10*
50.820.68*
60.880.74*
81.040.90R*
31Ga+340.610.473d10*
50.690.55
60.760.62R*
32Ge+260.870.734s2A
+440.530.393d10*
60.670.53R*
33As+360.720.584s2A
+540.4750.3353d10R*
60.600.46C*
34Se-261.841.984p6P
+460.640.504s2A
+640.420.283d10*
60.560.42C
35Br-161.821.964p6P
+34SQ0.730.594p2
+53PY0.450.314s2
+740.390.253d10
60.530.39A
36Kr4p6
37Rb+161.661.524p6
71.701.56
81.751.61
91.771.63E
101.801.66
111.831.69
121.861.72
1.971.83
38Sr+261.321.184p6
71.351.21
81.401.26
91.451.31
101.501.36C
121.581.44C
39Y+361.040.904p6R*
71.100.96
81.1591.019R*
91.2151.075R
40Zr+440.730.594p6R
50.800.66C
60.860.72R*
70.920.78*
80.980.84*
91.030.89
41Nb+360.860.724d2
+460.820.684d1RE
80.930.79
+540.620.484p6C
60.780.64
70.830.69C
80.880.74
42Mo+360.830.694d3E
+460.790.654d2RM
+540.600.464d1R
60.750.61R
+640.550.414p6R*
50.730.59
60.730.59R*
70.870.73
43Tc+460.7850.6454d3RM
+560.740.604d2ER
+740.510.374p6
60.70.56A
44Ru+360.820.684d5
+460.760.624d4RM
+560.7050.5654d3ER
+740.520.384d1
+840.500.364p6
45Rh+360.8050.6654d6R
+460.740.64d5RM
+560.690.554d4
46Pd+120.730.594d9
+24SQ0.780.644d8
61.000.86
+360.900.764d7
+460.7550.6154d6R
47Ag+120.810.674d10
41.141.00C
4SQ1.161.02
51.231.09C
61.291.15C
71.361.22
81.421.28
+24SQ0.930.794d9
61.080.94
+34SQ0.810.674d8
60.890.75R
48Cd+240.920.784d10
51.010.87
61.090.95
71.171.03C
81.241.1C
121.451.31
49In+340.760.624d10
60.940.80R*
81.060.92RC
50Sn+440.690.554d10R
50.760.62C
60.830.69R*
70.890.75
80.950.81C
51Sb+34PY0.90.765s2
50.940.8
60.900.76A
+560.740.604d10*
52Te-262.072.215p6P
+430.660.525s2
40.800.66
61.110.97
+640.570.434d10C
60.70.56*
53I-162.062.25p6A
+53PY0.580.445s2*
61.090.95
+740.560.424d10
60.670.53
54Xe+840.540.404d10
60.620.48
55Cs+161.811.675p6
81.881.74
91.921.78
101.951.81
111.991.85
122.021.88
56Ba+261.491.355p6
71.521.38C
81.561.42
91.611.47
101.661.52
111.711.57
121.751.61C
57La+361.1721.0324d10R
71.241.10
81.301.16R
91.3561.216R
101.411.27
121.501.36C
58Ce+361.151.016s1R
71.211.07E
81.2831.143R
91.3361.196R
101.391.25
121.481.34C
+461.010.875p6R
81.110.97R
101.211.07
121.281.14
59Pr+361.130.994f2R
81.2661.126R
91.3191.179R
+460.990.854f1R
81.100.96R
60Nd+281.431.294f4
91.491.35
+361.1230.9834f3R
81.2491.109R*
91.3031.163R
121.411.27E
61Pm+361.110.974f4R
81.2331.093R
91.2841.144R
52Sm+271.361.224f6
81.411.27
91.461.32
+361.0980.9584f5R
71.161.02E
81.2191.079R
91.2721.132R
121.381.24C
63Eu+261.311.174f7
71.341.20
81.391.25
91.441.3
101.491.35
+361.0870.9474f6R
71.151.01
81.2061.066R
91.261.12R
64Gd+361.0780.9384f7R
61.141.00
81.1931.053R
91.2471.107RC
65Tb+361.0630.9234f8R
71.120.98E
81.181.04R
91.2351.095R
+460.900.764f7R
81.020.88
66Dy+261.211.074f10
71.271.13
81.331.19
+361.0520.9124f9R
71.110.97
81.1671.027R
91.2231.083R
67Ho+361.0410.9014f10R
81.1551.015R
91.2121.072R
101.261.12
68Er+361.030.894f11R
71.0850.945
81.1441.004R
91.2021.062R
69Tm+261.171.034f13
71.231.09
+361.020.884f12R
81.1340.994R
91.1921.052R
70Yb+261.161.024f14
71.221.08E
81.281.14
+361.0080.8684f13R*
71.0650.925E
81.1250.985R
91.1821.042R
71Lu+361.0010.8614f14R
81.1170.977R
91.1721.032R
72Hf+440.720.584f14R
60.850.71R
70.900.76
80.970.83
73Ta+360.860.725d2E
+460.820.685d1E
+560.780.645p6
70.830.69
80.880.74
74W+460.800.665d2RM
+560.760.625d1R
+640.560.425d6*
50.650.51
60.740.6*
75Re+460.770.635d3RM
+560.720.585d2E
+660.690.555d1E
+740.520.385p6
60.670.53
76Os+460.770.635d4RM
+560.7150.5755d3E
+650.630.495d2
60.6850.545E
+760.6650.5255d1E
+840.530.395p6
77Ir+360.820.685d6E
+460.7650.6255d5R
+560.710.575d4EM
78Pt+24SQ0.740.605d8
60.940.80A
+460.7650.6255d6R
+560.710.575d5ER
79Au+161.511.375d10A
+34SQ0.820.685d8
60.990.85A
+560.710.575d6
80Hg+131.110.976s1
61.331.19
+220.830.695d10
61.100.96
81.281.14R
81Tl+161.641.56s2R
81.731.59R
121.841.70RE
+340.890.755d10
61.0250.885R
81.120.98C
82Pb+24PY1.120.986s2C
61.331.19
71.371.23C
81.431.29C
91.491.35C
101.541.40C
111.591.45C
121.631.49
+440.790.655d10E
50.870.73E
60.9150.775R
81.080.94R
83Bi+351.10.966s2C
61.171.03R*
81.311.17R
+560.900.765d10E
84Po+461.080.946s2R
81.221.08R
+660.810.675d10A
85At+760.760.625d10A
86Rn6p6
87Fr+161.941.806p6A
88Ra+281.621.486p6R
121.841.70R
89Ac+361.261.126p6R
90Th+461.080.946p6C
81.191.05RC
91.231.09*
101.271.13E
111.321.18C
121.351.21C
91Pa+361.181.045f2E
+461.040.96d1R
81.151.01
+560.920.786p6
81.050.91
91.090.95
92U+361.1651.0255f3R
+461.030.895f2
71.090.95E
81.141.00R*
91.191.05
121.311.17E
+560.900.765f1
70.980.84E
+620.590.456p6
40.660.52
60.870.73*
70.950.81E
81.000.86
93Np+261.241.105f5
+361.151.015f4R
+461.010.875f3R
81.120.98R
+560.890.755f2
+660.860.725f1R
+760.850.716p6A
94Pu+361.141.005f5R
+461.000.865f4R
81.100.96
+560.880.745f3E
+660.850.715f2R
95Am+271.351.215f7
81.401.26
91.451.31
+361.1150.9755f6R
81.231.09
+460.990.855f5R
81.090.95
96Cm+361.110.975f7R
+460.990.855f6R
81.090.95R
97Bk+361.100.965f8R
+460.970.835f7R
81.070.93R
98Cf+361.090.956d1R
+460.9610.8215f8R
81.060.92
ElementValenceCoordinateCrystal radiusIonic radiusOrbitNote