Sillimanite Flashcards

1
Q

What is sillimanite’s formula?

A

Al2SiO5

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2
Q

What is sillimanite’s crystal system?

A

tetrahedral

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3
Q

What is sillimanite’s hardness?

A

6.5-7.5

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4
Q

What is sillimanite’s cleavage?

A

{010} perfect (pinacoidal)

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5
Q

What is sillimanite’s occurrence?

A

pelitic metamorphic rocks

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6
Q

What is P/T of sillimanite?

A

high temperature

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