Discussion
Olivine is classed as a nesosilicate because its tetrahedra are
Answer: C
Correct answer: isolated and linked only through cations
In a nesosilicate the tetrahedra share no oxygens with one another and are held together by iron and magnesium ions between them. Olivine therefore has no plane of markedly weaker bonding and shows poor cleavage, and its structure is the most open to attack, which is why it is the first mineral to weather in a basic rock.
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