Ionic radii (Shannon) for octahedral M(-II) ion
These are Shannon ionic radii.
Units
pm
Notes
The "effective ionic radii" quoted here assume that the ionic radius of F- is 133 pm and that of O2- is 140 pm.
Values depend upon the coordination number and for d-block metals whether or not the metal is in a high or low spin state.
Older "crystal ionic radii" are based upon a radius of six-coordinate F- = 119 pm and are 14-18% larger than effective ionic radii.
You can look at visual representations of the data for different coordination and oxidation numbers using the following links,
- M(-III)
- M(-II)
- M(-I)
- M(I)
- M(II)
- M(II)
- M(III)
- M(IV)
- M(VI)
- M(VII)
- M(VIII)
- R.D. Shannon, Acta Cryst., 1976, A32, 751.
- R.D. Shannon and C.T. Prewitt, Acta Cryst., 1969, B25, 925.
- R.D. Shannon and C.T. Prewitt, Acta Cryst., 1970, B26, 1046.
- J.E. Huheey, E.A. Keiter, and R.L. Keiter in Inorganic Chemistry : Principles of Structure and Reactivity, 4th edition, HarperCollins, New York, USA, 1993.
Literature sources
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
1
|
2
|
|||||||||||||||||
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
10
|
|||||||||||
|
11
|
12
|
13
|
14
|
15
|
16
|
17
|
18
|
|||||||||||
|
19
|
20
|
21
|
22
|
23
|
24
|
25
|
26
|
27
|
28
|
29
|
30
|
31
|
32
|
33
|
34
|
35
|
36
|
|
|
37
|
38
|
39
|
40
|
41
|
42
|
43
|
44
|
45
|
46
|
47
|
48
|
49
|
50
|
51
|
52
|
53
|
54
|
|
|
55
|
56
|
* |
71
|
72
|
73
|
74
|
75
|
76
|
77
|
78
|
79
|
80
|
81
|
82
|
83
|
84
|
85
|
86
|
|
87
|
88
|
** |
103
|
104
|
105
|
106
|
107
|
108
|
109
|
110
|
111
|
112
|
113
|
114
|
115
|
116
|
117
|
118
|
| *Lanthanoids | * |
57
|
58
|
59
|
60
|
61
|
62
|
63
|
64
|
65
|
66
|
67
|
68
|
69
|
70
|
|||
| **Actinoids | ** |
89
|
90
|
91
|
92
|
93
|
94
|
95
|
96
|
97
|
98
|
99
|
100
|
101
|
102
|
|||