Chapter 12, Problem 125IE

Interpretation Introduction

Interpretation: The percent mass fractions of aluminum, magnesium and oxygen in the spinel mineral are given. The density of the spinel mineral and the edge length of the unit cell is given. The number of each atoms present in the unit cell is to be identified.

Conceptual introduction: The ideal gas equation is,

$\text{Pressure}\times \text{Volume}=\text{Number}\text{of}\text{moles}\times \text{Gas}\text{constant}\times \text{Absolute}\text{temperature}$

To determine: The number of each atoms present in the unit cell.