Nicle is an allotropic element , which has more then one form: FCC {111}- easy, FCC{100}-hard; and HCP [00-+1] easy(C-axis) ; Cobalt is allotropic: Co alpha HCP-[00-+1] easy(C-axis), Co beta FCC {111}-easy, FCC {100} hard; Iron is also allotropic BCC-{111} hard, {100} easy, Fe-FCC {111} easy, Fe-FCC{100} hard.