Small amounts of other minerals are often present, including Fe sulfide ( troilite ), metallic Fe-Ni, oxides such as chromite, and phosphates such as merrillite.
2.
There are minor amounts of other minerals, including several phosphates such as farringtonite ( Mg 3 ( PO 4 ) 2 ) and stanfieldite ( Ca 4 ( Mg, Fe ) 5 ( PO 4 ) 6 ) and merrillite ( a member of the whitlockite group ).
मोबाइल