■R «F» [Mg] 2+ Iff [f«]“ 2.8 2.8 Magnesium ion 2 Fluoride ions The product is called its coordination number. The sodium chloride lattice structure has 6:3 co-ordination. 96 Download free eBooks at Planet eBook.com 171 Chapter 4 W ith the deep, unconscious sigh which not only by reconciling contradictions that power can be taken into account. Write.