Which one of the following mineral does not contain oxygen ?

Which one of the following mineral does not contain oxygen ? Correct Answer Cryolite<br>

Cryolite (Na3AlF6, sodium hexafluoroaluminate) does not contain oxygen. It occurs as glassy, colorless, white-reddish to gray-black prismatic monoclinic crystals. Cryolite is used as an insecticide and a pesticide. It is also used to give fireworks a yellow color.
Bissoy MCQ

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