离子的大小

Mn+2  0.091nm
Mn+3  0.066nm
Mn+4  0.052nm

Co+2  0.082nm
Co+3   0.065nm

来自《催化原理》天津大学出版社的那本。书的封面被撕了，不知道具体的名称及作者

进入下面这个网站查比较好，选择元素后，在左边选Radii (记得可能不是很准确)，可以查同一价态原子不同配位，不同标准的原子/离子半径

[net]http://www.webelements.com[/net]

[ Last edited by daiqiguang on 2007-7-16 at 23:20 ]

具体可以查看

http://www.webelements.com/webel ... /text/Mn/radii.html
Radii
There are several ways to define radius for atoms and ions. Follow the appropriate hyperlinks for literature references and definitions of each type of radius. All values of radii are given in pm (picometres, or picometers in USA). Conversion factors are:

1 pm = 1 x 10-12 metre (meter)
100 pm = 1 Ångstrom
1000 pm = 1 nanometre (nm, nanometer)
MnMn distance in the element
One measure of size is the element-element distance within the element and this length is given here.

View... Interactive Cityscape Cylinders Line Balls Bar Intensity   Bond length in MnMn [/pm]: 273.1  

Neutral radii
The size of neutral atoms depends upon the way in which the measurement is made and the environment. Follow the appropriate hyperlinks for definitions of each radius type. The term "atomic radius" is not particularly helpful although its use is widespread. The problem is its meaning, which is clearly very different in different sources and books. Two values are given here, one is based upon calculations and the other upon observation - follow the appropriate link for further details.

View... Interactive Cityscape Cylinders Line Balls Bar Intensity   Atomic radius (empirical) [/pm]: 140  
View... Interactive Cityscape Cylinders Line Balls Bar Intensity   Atomic radius (calculated) [/pm]: 161  
View... Interactive Cityscape Cylinders Line Balls Bar Intensity   Covalent radius (empirical) [/pm]: 139  
View... Interactive Cityscape Cylinders Line Balls Bar Intensity   van der Waals radius [/pm]: no information  

Ionic radii
This table gives some ionic radii. In this table, geometry refers to the arrangment of the ion's nearest neighbours. Size does depend upon geometry and environment. For electronic configurations, where it matters, the values given for octahedral species are low spin unless stated to be high spin. The terms low spin and high spin refer to the electronic configurations of particular geomtries of certain d-block metal ions. Further information is available in inorganic chemistry textbooks, usually at Level 1 or First Year University level. For definitions of ionic radius and further information, follow the hypertext link.

Ion Coordination type Radius / pm
Mn(II) 4-coordinate, tetrahedral 80  
Mn(IV) 4-coordinate, tetrahedral 53  
Mn(V) 4-coordinate, tetrahedral 47  
Mn(VI) 4-coordinate, tetrahedral 39.5  
Mn(VII) 4-coordinate, tetrahedral 39  
Mn(II) 6-coordinate, octahedral 81  
Mn(II) 6-coordinate, octahedral, high spin 97.0  
Mn(III) 6-coordinate, octahedral 72  
Mn(III) 6-coordinate, octahedral, high spin 78.5  
Mn(IV) 6-coordinate, octahedral 67.0  
Mn(VII) 6-coordinate, octahedral 60  
Mn(II) 8-coordinate 110  


Pauling ionic radii
  Ion Pauling radius / pm
View... Interactive Cityscape Cylinders Line Balls Bar Intensity   Mn(I) 75  
  Mn(VII) 46  


http://www.webelements.com/webel ... /text/Co/radii.html

Radii
There are several ways to define radius for atoms and ions. Follow the appropriate hyperlinks for literature references and definitions of each type of radius. All values of radii are given in pm (picometres, or picometers in USA). Conversion factors are:

1 pm = 1 x 10-12 metre (meter)
100 pm = 1 Ångstrom
1000 pm = 1 nanometre (nm, nanometer)
CoCo distance in the element
One measure of size is the element-element distance within the element and this length is given here.

View... Interactive Cityscape Cylinders Line Balls Bar Intensity   Bond length in CoCo [/pm]: 250.6  

Neutral radii
The size of neutral atoms depends upon the way in which the measurement is made and the environment. Follow the appropriate hyperlinks for definitions of each radius type. The term "atomic radius" is not particularly helpful although its use is widespread. The problem is its meaning, which is clearly very different in different sources and books. Two values are given here, one is based upon calculations and the other upon observation - follow the appropriate link for further details.

View... Interactive Cityscape Cylinders Line Balls Bar Intensity   Atomic radius (empirical) [/pm]: 135  
View... Interactive Cityscape Cylinders Line Balls Bar Intensity   Atomic radius (calculated) [/pm]: 152  
View... Interactive Cityscape Cylinders Line Balls Bar Intensity   Covalent radius (empirical) [/pm]: 126  
View... Interactive Cityscape Cylinders Line Balls Bar Intensity   van der Waals radius [/pm]: no information  

Ionic radii
This table gives some ionic radii. In this table, geometry refers to the arrangment of the ion's nearest neighbours. Size does depend upon geometry and environment. For electronic configurations, where it matters, the values given for octahedral species are low spin unless stated to be high spin. The terms low spin and high spin refer to the electronic configurations of particular geomtries of certain d-block metal ions. Further information is available in inorganic chemistry textbooks, usually at Level 1 or First Year University level. For definitions of ionic radius and further information, follow the hypertext link.

Ion Coordination type Radius / pm
Co(II) 4-coordinate, tetrahedral 72  
Co(IV) 4-coordinate, tetrahedral 54  
Co(II) 6-coordinate, octahedral 79  
Co(II) 6-coordinate, octahedral, high spin 88.5  
Co(III) 6-coordinate, octahedral 68.5  
Co(III) 6-coordinate, octahedral, high spin 75  
Co(IV) 6-coordinate, octahedral, high spin 67  
Co(II) 8-coordinate 104  


Pauling ionic radii
  Ion Pauling radius / pm
View... Interactive Cityscape Cylinders Line Balls Bar Intensity   Co(I) no information，

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这个网站真的很好，顶一个！