The Application of Nanoparticle Ceramic Materials in the Design of Modern Handicrafts

Table 1

Relationship between and the coordination number.

to radius ratio	Coordination number	Coordination polyhedron
0.000~0.155	2	Dumbbell shape
0.155~0.255	3	Plane triangle
0.255~0.414	4	Tetrahedron
0.414~0.732	6	Octahedron
0.732~1.000	8	Cube
1.000	12	Tetrahedron