Q199
Sulphur is not present in
A.
coal
B.
gypsum
C.
iron pyrites
D.
chlorapatite
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
Sulphur is not present in chlorapatite. Chlorapatite is formed in fluor-deficient environments, and found in calcium silicate marbles, in layered mafic intrusions and in diabases. It is known to replace triphylite in some granite pegmatites (Ptáček 2016). A monoclinic polymorph, chlorapatite-M is known.