In addition to forming fluorapatite crystals like other fluorides, stannous fluoride also has a toxic effect on acid-producing mouth bacteria, says biochemist Matthew J. Doyle, director of global research and development for P & G's oral-care division.    From Wordnik.com.  [The Acid Test for Enamel-Saving Toothpastes] Reference

Concentrations of the REE's have been identified within phosphate minerals from the project such as carbonated monazite, dahllite, apatite and fluorapatite genetically associated with the alkalic sill complex.    From Wordnik.com.  [Marketwire - Breaking News Releases]