この表は元素のイオン半径を示したものです。From [Handbook of Chem.& Phys., 79th Edition]

Y.Q.Jia, J.Solid State Chem., 95(1991)184

 

element

valence state

CN

R(A)

F

-1

6

1.33

Cl

-1

6

1.81

Br

-1

6

1.96

I

-1

6

2.20

OH

-1

4

1.35

OH

-1

6

1.37

O

-2

2

1.21

O

-2

6

1.40

O

-2

8

1.42

S

-2

6

1.84

Se

-2

6

1.98

Te

-2

6

2.21

Ac

+3

6

1.12

Ag

+1

4

1.00

Ag

+1

6

1.15

Ag

+1

8

1.28

Ag

+2

4sq

0.79

Ag

+2

6

0.94

Al

+3

4

0.39

Al

+3

5

0.48

Al

+3

6

0.54

Am

+3

6

0.98

Am

+3

8

1.09

Am

+4

6

0.85

Am

+4

8

0.95

As

+3

6

0.58

As

+5

4

0.34

As

+5

6

0.46

Au

+1

6

1.37

Au

+3

4sq

0.64

Au

+3

6

0.85

Ba

+2

6

1.35

+2

8

1.42

+2

12

1.61

Be

+2

4

0.27

+2

6

0.45

Bi

+3

5

0.96

+3

6

1.03

+3

8

1.17

Bi

+5

6

0.76

Bk

+3

6

0.96

Bk

+4

6

0.83

+4

8

0.93

Br

+5

3py

0.31

+7

4

0.25

+7

6

0.39

C

+4

4

0.15

+4

6

0.16

Ca

+2

6

1.00

Ca

+2

8

1.12

Ca

+2

10

1.23

Ca

+2

12

1.34

Cd

+2

4

0.78

Cd

+2

6

0.95

Cd

+2

8

1.10

Cd

+2

12

1.31

Ce

+3

6

1.01

Ce

+3

8

1.14

Ce

+3

10

1.25

Ce

+3

12

1.34

Ce

+4

6

0.87

Ce

+4

8

0.97

Ce

+4

10

1.07

Ce

+4

12

1.14

Cf

+3

6

0.95

Cf

+4

6

0.82

Cf

+4

8

0.92

Cl

+5

3py

0.12

Cl

+7

4

0.08

Cm

+3

6

0.97

Cm

+4

6

0.85

Cm

+4

8

0.95

Co

+2

4

0.56

Co

+2

6

0.65

Co

+2

8

0.90

Co

+3

6

0.55

Cr

+2

6

0.73

Cr

+3

6

0.62

Cr

+4

4

0.41

Cr

+4

6

0.55

Cr

+6

4

0.26

Cr

+6

6

0.44

Cs

+1

6

1.67

Cs

+1

8

1.74

Cs

+1

10

1.81

Cs

+1

12

1.88

Cu

+1

2

0.46

Cu

+1

4

0.60

Cu

+1

6

0.77

Cu

+2

4sq

0.57

Cu

+2

6

0.73

Dy

+2

6

1.07

Dy

+2

8

1.19

Dy

+3

6

0.91

Dy

+3

8

1.03

Er

+3

6

0.89

Er

+3

8

1.00

Eu

+2

6

1.17

Eu

+2

8

1.25

Eu

+2

10

1.35

Eu

+3

6

0.95

Eu

+3

8

1.07

F

+7

6

0.08

Fe

+2

4

0.63

Fe

+2

6

0.61

Fe

+2

8

0.92

Fe

+3

4

0.49

Fe

+3

6

0.55

Fe

+3

8

0.78

Fr

+1

6

1.80

Ga

+3

4

0.47

Ga

+3

6

0.62

Gd

+3

6

0.94

Gd

+3

8

1.05

Ge

+2

6

0.73

Ge

+4

4

0.39

Ge

+4

6

0.53

Hf

+4

4

0.58

Hf

+4

6

0.71

Hf

+4

8

0.83

Hg

+1

6

1.19

Hg

+2

2

0.69

Hg

+2

4

0.96

Hg

+2

6

1.02

Hg

+2

8

1.14

I

+5

3py

0.44

I

+5

6

0.95

I

+7

4

0.42

I

+7

6

0.53

In

+3

4

0.62

In

+3

6

0.80

Ir

+3

6

0.68

Ir

+4

6

0.63

Ir

+5

6

0.57

K

+1

4

1.37

K

+1

6

1.38

K

+1

8

1.51

K

+1

12

1.64

La

+3

6

1.03

La

+3

8

1.16

La

+3

10

1.27

La

+3

12

1.36

Li

+1

4

0.59

Li

+1

6

0.76

Li

+1

8

0.92

Lu

+3

6

0.86

Lu

+3

8

0.97

Mg

+2

4

0.57

Mg

+2

6

0.72

Mg

+2

8

0.89

Mn

+2

4

0.66

Mn

+2

6

0.83

Mn

+2

8

0.96

Mn

+3

6

0.58

Mn

+4

4

0.39

Mn

+4

6

0.53

Mn

+5

4

0.33

Mn

+6

4

0.26

Mn

+7

4

0.25

Mo

+3

6

0.69

Mo

+4

6

0.65

Mo

+5

4

0.46

Mo

+5

6

0.61

Mo

+6

4

0.41

Mo

+6

6

0.59

Mo

+6

7

0.73

N

+3

6

0.16

N

+5

6

0.13

Na

+1

4

0.99

Na

+1

6

1.02

Na

+1

8

1.18

Na

+1

9

1.24

Na

+1

12

1.39

Nb

+3

6

0.72

Nb

+3

8

0.79

Nb

+4

6

0.68

Nb

+5

4

0.48

Nb

+5

6

0.64

Nb

+5

8

0.74

Nd

+3

6

0.98

Nd

+3

8

1.12

Nd

+3

9

1.16

Nd

+3

12

1.27

Ni

+2

4sq

0.49

Ni

+2

6

0.69

+3

6

0.56

Np

+3

6

1.01

+4

6

0.87

+5

6

0.75

+6

6

0.72

Os

+4

6

0.63

+5

6

0.58

+6

6

0.55

+8

4

0.39

P

+5

4

0.17

+5

6

0.38

Pa

+3

6

1.04

Pa

+4

6

0.90

Pa

+5

6

0.78

Pb

+2

6

1.19

Pb

+2

8

1.29

Pb

+2

10

1.40

Pb

+2

12

1.49

Pb

+4

4

0.65

Pb

+4

6

0.78

Pb

+4

8

0.94

Pd

+2

4sq

0.64

Pd

+2

6

0.86

Pd

+3

6

0.76

Pd

+4

6

0.62

Pm

+3

6

0.97

Pm

+3

8

1.09

Po

+4

6

0.97

Pr

+3

6

0.99

Pr

+3

8

1.13

Pr

+4

6

0.85

Pr

+4

8

0.96

Pt

+2

4sq

0.60

Pt

+2

6

0.80

Pt

+4

6

0.63

Pu

+3

6

1.00

Pu

+4

6

0.86

Pu

+5

6

0.74

Pu

+6

6

0.71

Ra

+2

8

1.48

Ra

+2

12

1.70

Rb

+1

6

1.52

Rb

+1

8

1.61

Rb

+1

10

1.66

Rb

+1

12

1.72

Re

+4

6

0.63

Re

+5

6

0.58

Re

+6

6

0.55

Re

+7

4

0.38

Re

+7

6

0.53

Rh

+3

6

0.67

Rh

+4

6

0.60

Rh

+5

6

0.55

Ru

+3

6

0.68

Ru

+4

6

0.62

Ru

+5

6

0.57

Ru

+7

4

0.38

Ru

+8

4

0.36

S

+4

6

0.37

S

+6

4

0.12

S

+6

6

0.29

Sb

+3

4py

0.76

Sb

+3

6

0.76

Sb

+5

6

0.60

Sc

+3

6

0.75

Sc

+3

8

0.87

Se

+4

6

0.50

+6

4

0.28

+6

6

0.42

Si

+4

4

0.26

+4

6

0.40

Sm

+2

6

1.19

Sm

+2

8

1.27

Sm

+3

6

0.96

Sm

+3

8

1.08

Sm

+3

12

1.24

Sn

+4

4

0.55

Sn

+4

6

0.69

Sn

+4

8

0.81

Sr

+2

6

1.18

Sr

+2

8

1.26

Sr

+2

10

1.36

Sr

+2

12

1.44

Ta

+3

6

0.72

Ta

+4

6

0.68

Ta

+5

6

0.64

Tb

+3

6

0.92

Tb

+3

8

1.04

Tb

+4

6

0.76

Tb

+4

8

0.88

Tc

+4

6

0.65

Te

+4

4

0.66

Te

+4

6

0.97

Te

+6

4

0.43

Te

+6

6

0.56

Th

+4

6

0.94

Th

+4

8

1.05

Th

+4

10

1.13

Th

+4

12

1.21

Ti

+2

6

0.86

Ti

+3

6

0.67

Ti

+4

4

0.42

Ti

+4

6

0.61

Ti

+4

8

0.74

Tl

+1

6

1.50

Tl

+1

8

1.59

Tl

+1

12

1.70

Tl

+3

4

0.75

Tl

+3

6

0.89

Tl

+3

8

0.98

Tm

+2

6

1.01

Tm

+2

7

1.09

Tm

+3

6

0.88

Tm

+3

8

0.99

U

+3

6

1.03

U

+4

6

0.89

U

+4

8

1.00

U

+4

12

1.17

U

+5

6

0.76

U

+6

2

0.45

U

+6

4

0.52

U

+6

6

0.73

U

+6

8

0.86

V

+2

6

0.79

V

+3

6

0.64

V

+4

5

0.53

V

+4

6

0.58

V

+4

8

0.72

V

+5

4

0.36

V

+5

5

0.46

V

+5

6

0.54

W

+4

6

0.66

W

+5

6

0.62

W

+6

4

0.42

W

+6

5

0.51

W

+6

6

0.60

Y

+3

6

0.90

Y

+3

8

1.02

Y

+3

9

1.08

Yb

+2

6

1.02

Yb

+2

8

1.14

Yb

+3

8

0.99

Yb

+3

9

1.04

Zn

+2

4

0.60

Zn

+2

6

0.74

Zn

+2

8

0.90

Zn

+4

4

0.59

Zn

+4

6

0.72

Zn

+4

8

0.84

Zn

+4

9

0.89