Rock phosphate constitutes mainly of___________________?
Correct answer: B. Fluorapatite
- A. Di-calcium phosphate
- B. Fluorapatite
- C. Mono-calcium phosphate
- D. Di-ammonium phosphate
Explanation
Natural phosphate rock consists mainly of apatite minerals, especially fluorapatite, represented approximately by Ca10(PO4)6F2. Mono- and di-calcium phosphates are manufactured phosphate products, not the main mineral in the rock.
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