MTE2541 Lecture Notes - Lecture 2: Niobium, Ionic Radius, Packing Density

• School: Monash University
• Department: Engineering - Materials
• Course: MTE2541
• Professor: All

Document Summary

Find and name some notable exceptions to this (including fe), and give a short explanation for the. [2] determine the coordination number for fcc, hcp, bcc, sc, and the diamond structure, for elemental solids. [3] explain why many crystals do not assume a close packed configuration, using the examples of c (diamond and graphite) and nacl (sodium chloride) to illustrate your answer. [5] a simple cubic (sc) crystal structure is one where the atoms are at the eight corners of a cube, and there are no face centred or body centred atoms. Assuming that element a forms a simple cubic structure made up solely of spherical atoms of element a, calculate the proportion of space occupied (the packing fraction) for the simple cubic structure. Show all details of the calculation, and discuss any assumptions involved. B atoms relative to that of the a atoms. Calculate the packing fraction of the aforementioned arrangement.