Cordierite Flashcards by Travis Gilskey

Q

What is Cordierite’s formula?

A

(Mg,Fe)2Al3(AlSi5)O18xnH20

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Q

What is Cordierite’s crystal system?

A

orthorhombic 2/m2/m2/m

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Q

What is Cordierite’s form?

A

anhedral crystals

may show pseudo hexagonal twins

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Q

What is Cordierite’s cleavage?

A

poor {010}

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Q

What is Cordierite’s hardness?

A

7-7.5

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Q

What is cordierite’s occurrence?

A

medium and high grade politic metamorphic rocks

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