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Questions and Answers
What is the term used for fluorapatite with more than 1% fluorine, commonly found in sedimentary rocks?
What is the term used for fluorapatite with more than 1% fluorine, commonly found in sedimentary rocks?
- Fluorohydroxyapatite
- Dahllite
- Francolite (correct)
- Hydroxyl apatite
What is the common range of carbonate ion content in fluorapatite?
What is the common range of carbonate ion content in fluorapatite?
- Less than 1%
- Up to 10% (correct)
- Around 5%
- Between 10-15%
What color are hydroxyl apatite crystals in their natural state?
What color are hydroxyl apatite crystals in their natural state?
- White
- Blue and purple
- Brown, yellow, and green (correct)
- Red and orange
In what crystal system does hydroxyl apatite crystallize?
In what crystal system does hydroxyl apatite crystallize?
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% of fluorine determines whether apatite may be termed as Francolite or Dahllite. What is the threshold for each?
% of fluorine determines whether apatite may be termed as Francolite or Dahllite. What is the threshold for each?
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