Pure iron crystallizes in a body-centered cubic structure, shown in the figure. but small amounts of impurities can stabilize a facecentered cubic structure. Which form of iron has a higher density?

Video transcript

Hello everyone. So in this video we're trying to identify why copper is more dense than niobium. So although niobium is heavier per adam, copper is denser because of its crystal structure. So niobium that has A. B. C. C. What that stands for is going to be body centered cubic structure. So even though it is cubic, it's not closely packed and it forms strong metals. So in our new opium we have two atoms per unit cell. As to if you're compared to copper, it's F. C. C. Which is face centered cubic structure, It has four atoms per unit cell. You see here that this has to less atoms than our copper and that's because it's not closely packed. So you can say that because copper has F. C. C. Structure while niobium because BCC structure. So that's going to be why copper is more dense than niobium. And this is going to be my final answer for this question. Thank you all so much for watching.