Framework Silicates (1:2) Flashcards

1
Q

Quartz

A

SiO2

Silica

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2
Q

Chalcedony

A

SiO2

Microcrystalline silica

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3
Q

Opal

A

SiO2 • n H2O

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4
Q

Plagioclase

A

NaAlSi3O8, CaAl2Si2O8
Na-Ca feldspar
Albite-anorthite

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5
Q

Potassium feldspar

A

KAlSi3O8
K-feldspar
Orthoclase, microcline, sanidine

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6
Q

Leucite

A

KAlSi2O6

K-feldspathoid

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7
Q

Nepheline

A

(Na,K)AlSiO4

Na-feldspathoid

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