CATALOGUE OF MINERALS. 25 



5. Phosphates, Arsenatcs, Antimonates, Nitrates. 



a. ANHYDROUS. 



1. Hexagonal. 



495. Apatite* Ca 3 i^ + -ICa (C1,F) 6 



496. Hydroapatite Ca 3 ! 1 + ^CaF + H 



497. Cryptolite Ce 3 6 



498. Pyromorphite * b 3 P + J ; Pb Cl 6 



499. Mimetene* (fb, Ca) 3 (Is, P) + -apb Cl 6 



2. Dimc.tr ic. 



500. Xenotime * (Y, Ce) 1 2 



