. "Blue apatite" . . . "apatite group" . . . . . . . . "Apatite" . . . "apatite" . . . . "apatite supergroup" . . . . . . . . "apatitic" . "Apatite" . . . . . . . . . . "phosphate rock" . . . "Calcium hydroxyphosphate" . . . . . . . . "apatite crystals" . . . . . . .