Kyanite, Andalusite, and Sillimanite are what type of minerals?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Study for the ASBOG Fundamentals of Geology exam. Access flashcards, multiple-choice questions, and understand key geologic principles. Prepare confidently for your exam!

Multiple Choice

Kyanite, Andalusite, and Sillimanite are what type of minerals?

Explanation:
These minerals are same-chemical-formula representatives that differ only in their crystal structure, which makes them polymorphs. Kyanite, andalusite, and sillimanite all have the formula Al2SiO5, but each forms a distinct crystal arrangement that is stable under different temperatures and pressures. This is why they’re discussed together as a set: they reveal metamorphic history by indicating the PT conditions a rock experienced. They’re also silicate minerals, since they contain silicon and oxygen in a silicate framework, but the key idea here is their relationship as polymorphs rather than a broad silicate category. They aren’t isotopes or oxides.

These minerals are same-chemical-formula representatives that differ only in their crystal structure, which makes them polymorphs. Kyanite, andalusite, and sillimanite all have the formula Al2SiO5, but each forms a distinct crystal arrangement that is stable under different temperatures and pressures. This is why they’re discussed together as a set: they reveal metamorphic history by indicating the PT conditions a rock experienced. They’re also silicate minerals, since they contain silicon and oxygen in a silicate framework, but the key idea here is their relationship as polymorphs rather than a broad silicate category. They aren’t isotopes or oxides.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy