Question: Magnesium silicate, Mg2SiO4, forms in the olivine crystal structure that consists of an HCP arrangement of O2- ions. (a) Which type of interstitial site will

Magnesium silicate, Mg2SiO4, forms in the olivine crystal structure that consists of an HCP arrangement of O2- ions.

(a) Which type of interstitial site will the Mg2+ ions occupy? Why?

(b) Which type of interstitial site will the Si4+ ions occupy? Why?

(c) What fraction of the total tetrahedral sites will be occupied?

(d) What fraction of the total octahedral sites will be occupied?

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