正多面体的数学和结晶学参数

    Mathematic and Crystallographic Parameters of Regular Polyhedrons

 

 

正多面体的数学和结晶学参数

Mathematic and Crystallographic Parameters of Regular Polyhedrons

正多面体名称

(Name of regular polyhedron)

正四面体(Regular tetrahedron)

正六面体(Regular hexahedron)

正八面体(Regular octahedron)

正十二面体

(Regular dodecahedron)

正二十面体

(Regular icosahedron)

图形符号

T

O

O

I

I

面形

正三角形

正方形

正三角形

正五边形

正三角形

正三面角

正三面角

直三面角

正四面角

正三面角

正五面角

面数ƒ

4

6

8

12

20

棱数k

6

12

12

30

30

顶点数e

4

8

6

20

12

顶点到中心距离d

0.5443a

0.8660a

0.7071a

1.4103a

0.95105a

      棱长a     

(顶点到中心距离d)

1.8472

1.1547

1.4142

0.7091

1.0515

表面积S多面体

1.7321a2

6a2

3.4641a2

20.6458a2

8.6603a2

体积V多面体

0.1179a3

a3

0.4714a3

7.6631a3

2.1817a3

外接球表面积S外接球

3.7229a2

9.4242a2

6.2831a2

24.9938a2

11.3662a2

外接球体积V外接球

1.2410a3

2.7205a3

1.4809a3

11.7496a3

3.6033a3

中心原子半径r

0.0443a

0.3660a

0.2071a

0.9103a

0.45105a

配位原子半径R

0.5a

0.5a

0.5a

0.5a

0.5a

r/R

0.0886

0.7320

0.4142

1.8206

0.9021

R/r

11.2867

1.3661

2.4142

0.5493

1.1085

点群符号

m3m

m3m

对称要素

相邻对称轴之间的夹角

∧ = 90°

= 90°

= 90°

= 63.43°

= 63.43°

∧ = 70.53°

= 70.53°

= 70.53°

= 41.81°

= 41.81°

= 19.47°

= 28.97°

= 28.97°

= 36°

= 36°

-

= 19.47°

= 19.47°

= 37.38°

= 37.38°

-

= 45°

= 45°

= 31.72°

= 31.72°

-

= 34.88°

= 34.88°

= 20.90°

= 20.90°

 

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