结构推理
How many crystal systems are there? How many patterns can atoms form with these crystal systems? What are the three types of unit cell that atoms form with cubic crystal system? (Note: full spelling and abbreviation are required for each type)
【正确答案】There are seven crystal systems and atoms can form total 14 Brevais lattices with these seven crystal systems. There are three types of unit cell for cubic crystal system, including simple cubic unit cell (sc), body-centered cubic unit cell (bcc), and face-centered cubic unit cell (fcc).