non silicates - halogenides Flashcards

1
Q

which halogenides might come up in the exam? (and thus you need to know)

A

flourite

Halite

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2
Q
identify the following mineral:
habit:
- cubic 
colour:
- can vary but most commonly purple 
- no streak
lustre:
-vitreous 
hardness:
- 3/4 scratched by steel nail
clevage:
- can have 4 directions 
perfect
A

flourite

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3
Q

what are the diagnostic properties of flourite (eg. how would you know its flourite?)

A
  • four clevage directions

- purple colour - cubic crystal habit

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4
Q

what property do all halogenides share?

A

cubic crystal habit

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5
Q
identify the follwing mineral:
habit:
- cubic (when not massive)
colour:
- white, orange 
- white streak 
cleavage:
- three directions 
- all at 90 and perfect 
hardness
A

halite

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6
Q

what are the diagnostic properties of halite?

A
  • hardness only 1/2
  • tastes like salt
  • 3 perfect cleavage direction
  • cubic habit
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