1. I know the highest linear density direction in bcc is and planar density direction {110}. In fcc, linear density direction is and planar density direction is {111}.
2. However, I need to make a different slip system to calculate the Schmid factor. I know; in fcc and bcc, the number of the systems is 12. But I don't know how to make 12 different combinations. For me, it seems like random. For instance, {1-10}, but why? So, please explain to me how we make different combinations for the glide system, and explain it step by step, like why you chose the direction for the plane.

Table 1. Slip-system sets in Schmid and Boas' nomenclature. The vector m is the unit normal to the slip plane, and s is the unit vector in the direction of the Burgers vector of the avratam A 11 rontown nwo nvmmonand in onetanion onomelinntan