Question

A mineral that contains iron and sulfur has the cubic unit cell pictured below. What is the empirical formula for this mineral?

•Fe atoms are the smaller spheres; one on each corner and one on each face of the unit cell
•S atoms are the eight larger spheres; every S atom is entirely inside the unit cell

Answer 1

I was able to figure it out, just forgot to simplify in the end.

Answer 2

Good.