Characterization of carbonate environments in carbonate apatite

CHED 1372

Andrew Kozlowski, Department of Chemistry, St. Lawrence University, 23 Romoda Dr, Canton, NY 13617, Harris Mason, Department of Geosciences, SUNY Stony Brook, Stony Brook, NY 11794, and Brian L. Phillips, brian.phillips@sunysb.edu, Center for Environmental Molecular Science, Department of Geosciences, SUNY Stony Brook, State University of New York, Stony Brook, NY 11794-2100.
The three main constituents of the apatite mineral group are fluorapatite, chlorapatite and hydroxylapatite. Since these minerals are found in low temperature environments, their composition can be affected by the amount of carbon dioxide dissolved in the air, water and soil. This can lead to the substitution of carbonate into their crystal structure resulting in the formation of carbonate apatite. The carbonate ion can substitute for the anion in the channels of the apatite structure, resulting in A-type carbonate apatite (CAp), for a phosphate group resulting in B-type CAp or both sites resulting in an AB-type CAp. The purpose of our study was to characterize the carbonate environments of a natural carbonate apatite and 13C enriched synthesized samples of carbonate apatite using 13C single-pulse MAS, 13C{1H} CP/MAS and 13C-1H HetCor solid state nuclear magnetic resonance (NMR), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and scanning electron microscopy (SEM) methods.
 

Undergraduate Research Poster Session: Physical Chemistry
2:00 PM-4:00 PM, Monday, March 26, 2007 Hyatt Regency Chicago -- Riverside Center, Poster

Division of Chemical Education

The 233rd ACS National Meeting, Chicago, IL, March 25-29, 2007