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Bridging oxygen - PowerPoint PPT Presentation


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Bridging oxygen. Apical oxygen. Non-bridging oxygen. Ca 2 Si 2 O 6. Fe 2 Si 2 O 6. Mg 2 Si 2 O 6. Ca. Mg. Fe. Quad Pyroxenes. Ca. Mg. Fe. Quad Pyroxenes. Ca. Pyroxenoids. Mg. Fe. Wollastonite. Ca. Mg. Fe. Enstatite. Ferrosilite. Ca. Diopside. Hedenburgite. Mg. Fe.

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Presentation Transcript
slide3

Bridging oxygen

Apical oxygen

Non-bridging oxygen

slide4

Ca2Si2O6

Fe2Si2O6

Mg2Si2O6

slide5

Ca

Mg

Fe

slide7

Quad Pyroxenes

Ca

Pyroxenoids

Mg

Fe

slide8

Wollastonite

Ca

Mg

Fe

Enstatite

Ferrosilite

slide9

Ca

Diopside

Hedenburgite

Mg

Fe

Ferrosilite

slide10

Ca

Diopside

Hedenburgite

Pigeonite

Mg

Fe

Ferrosilite

slide11

Ca

Diopside

Hedenburgite

Augite

Pigeonite

Mg

Fe

Enstatite

Ferrosilite

slide19

Ca

Diopside

Hedenburgite

Augite

Pigeonite

Mg

Fe

Enstatite

Ferrosilite

slide21

Amphibole Site Nomenclature

W0-1X2Y5Z8O22 (OH,F)2

W= ions in A site, 10-12 coordinated (Na, K)

X= ions in 2 M4 sites, 6-8 coordinated (Mg, Fe2+, Ca, Na)

Y= ions in 5 octahedral M2, M1, M3 sites

(Mg, Fe2+, Fe3+, Al, Ti)

Z= Si or Al in tetrahedral sites