|  |   |       e
 
 
 
  
 
 


" .."
5
1. \mathrm {YB}_6, \mathrm {LaB}_6 \mathrm {YbB}_6
2. \mathrm {YB}_6 \mathrm {YbB}_6 -
3. Tm1-x Ybx B12
4. - Tm1-x Ybx B12
5. LuB12: