I was wondering if someone could tell me (in pedestrian terms) what are the crystal structures of aluminum, copper and iron as a function of the temperature. I just read the chapter on crystalline arrays of Callister's Materials Ecience & Eng. but the book just says that Cu and Al have a FCC structure at room temperature, while Fe has a BCC structure, but it doesn't go much farther than that, and as I have basically no previous knowledge of the subject, I can't easily read more advanced texts. Thanks in advance. Note. Since this isn't a standard problem-solution type of question I posted it here instead of the homework help sections; please tell me if I should change this.