Reference structrue in MEAM potential

Dear all:

During the parameterization of MEAM potential, as the manual shown, the reference structure lattce(I,J) could be dia,fcc,bcc,dim,b1,hcp,c11,l12 and b2 ( However, I found an another reference structure b3 or F43m used in the article ( So, I want to ask that if I want use the other reference structure in MEAM potential, how could i do it?

Thank you for your time.