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MFoB > Mineraler > Flashcards

Mineraler Flashcards

1
Q

Hvilke silikatstrukturer?

A

Neso
Cyclo
Phyllo
Soro
Inso
Tekto

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2
Q

Hvad kendetegner Neso silikater

A

Selvstændige thetraeder

Olivin, granat, alummosilikater (kyanit, andalusit, silimanit) staurolit, zirkon

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3
Q

Hvad kendetegner soro silikater

A

To thetraeder bundet sammen - deler iltatom

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4
Q

Na-plagioklas

A

Hvid - Albite

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5
Q

Ca-plagioklas

A

Grå

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6
Q

Clinopyroksen

A

Pyroxen, der indeholder Ca bortset fra Fe og Mg og er monoklinisk

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7
Q

Orthopyroksen

A

Pyroxen med ortorhombisk krystalsystem og Fe-Mg fast opløsning

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8
Q

Serpentin

A

Opstår når olivin er hydreret.
Indeholder Mg, men ikke jern fra olivinen. Jern går ind i et nyt mineral (magnetit)

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9
Q

Koblet udskiftning (“coupled”)

A

For eksempel udveksler Na+Si med Ca+Al i plagioklas

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10
Q

De tre Al2SiO5-polymorfer

A

Andalusit, Sillimanit, Kyanit

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11
Q

Tre ring-silikater

A

Tourmalin, beryl, cordierit

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12
Q

Den blå amfibol

A

Glaukofan (forekommer i blåskifer, høj p, lav T)

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13
Q

To eksempler på mineraler i halogenid-gruppen

A

Halit, fluorit

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14
Q

To eksempler på sulfater

A

Gips, baryt

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15
Q

Mg-rig granat

A

Pyrop-forekomst i kappesten (granat-peridotit) eller eklogit

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16
Q

Ca-rig granat

A

Grossular-forekomst (smykkesten, rødlig) i metacarbonater, skarn (metamorfoseret sten)

17
Q

Fe-rig granat

A

Almandin-forekomst i metamorfoseret skifer

18
Q

Kemi i plagioklas

A

Fast opløsning mellem Na og Ca

19
Q

Kemi i alkalifeldspar

A

Fast opløsning mellem Na og K (kun ved høj T)

20
Q

Pertit

A

Alkali-feldspat, der blev “blandet ud” under langsom afkøling til Na- og K-rige domæner

21
Q

Sanidin

A

Alkalifeldspar ved høj T

22
Q

Fraktioneret krystallisation

A

Mineraler, der dannes i en smelte (magma), ‘fjernes’ og er ikke i ligevægt med den omgivende smelte

23
Q

Tektosilikater

A

Feldspat
Feldspatoider
Kvarts

MFoB (7 decks)

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