22
a'
 Ni
a.
B
to^Of O 0,9 o
 >c  / Q/ft/jji s
0/\o
o/ o (o,iv0 yo
*"Q x* o Jp/f'/So/ 
oy^fMoy^
& o 0 'm'o W o O
O Mo
O Ni
B'
b.
Figure 2.9 The N2M0 DO22 phase;
a.) N2M0 Pt2Mo unit cell and b.) two
dimensional representation of Figure
2.9a showing 1.) FCC unit cell ( ) ,
2.) Pt2Mo unit cell ( ), and 3.) 420
FCC stacking sequence ( ) .