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Topaz is a ______ of fluorine and aluminium.
sulphate
phosphate
carbonate
silicate
- Topaz is a mineral composed of aluminum and fluoride.
- It often forms in silicate rocks and is found in varieties of colors.
- Option 1: Sulphate - Not relevant; topaz is not a sulphate of any kind.
- Option 2: Phosphate - Incorrect; topaz does not contain phosphorus.
- Option 3: Carbonate - Incorrect; carbonate minerals contain the carbonate ion, which does not relate to topaz.
- Option 4: Silicate - Topaz is a nesosilicate mineral composed of aluminum, silicon, and fluorine (Al2SiO4(F,OH)2).
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