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Title: X-ray Linear Dichroism in Apatite

Abstract

The recent observation in parrotfish teeth of X-ray linear dichroism motivated an in-depth investigation into this spectroscopic effect in various apatite crystals, including geologic hydroxyapatite (Ca 5(PO 4) 3OH), fluorapatite (Ca 5(PO 4) 3F), and their biogenic counterparts in human bone, mouse enamel, and in parrotfish bone, dentin, and enameloid, the equivalent of dental enamel in certain fish. These data are important because they now enable visualization of the nano- to microscale structure of apatite crystals in teeth and bone. Polarization-dependent imaging contrast (PIC) maps of lamellar bone, obtained with a new method that minimizes space-charge and charging effects, show the expected rotating apatite crystal orientations. PIC maps of mouse enamel reveal a complex arrangement of hydroxyapatite crystals perpendicular to the dentin-enamel junction, with rods arranged in a decussation pattern in inner enamel and nearly parallel to one another in outer enamel. In both inner and outer enamel crystal c-axes are not always aligned with the rod elongation direction.

Authors:
 [1];  [2]; ORCiD logo [3];  [1];  [4]; ORCiD logo [2]; ORCiD logo [5]; ORCiD logo [3]; ORCiD logo [6]
  1. Univ. of Wisconsin, Madison, WI (United States). Dept. of Physics
  2. Aarhus Univ., Aarhus (Denmark). Dept. of Chemistry
  3. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Physical Sciences Division
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  5. Univ. of Pittsburgh, PA (United States). Dept. Oral Biology and Bioengineering, Center for Craniofacial Regeneration, McGowan Inst. for Regenerative Medicine, School of Dental Medicine
  6. Univ. of Wisconsin, Madison, WI (United States). Dept. of Physics, and Dept. of Chemistry, Materials Science, and Geoscience
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1542317
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Journal of the American Chemical Society
Additional Journal Information:
Journal Volume: 140; Journal Issue: 37; Journal ID: ISSN 0002-7863
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Stifler, Cayla A., Wittig, Nina Kølln, Sassi, Michel, Sun, Chang-Yu, Marcus, Matthew A., Birkedal, Henrik, Beniash, Elia, Rosso, Kevin M., and Gilbert, Pupa U. P. A. X-ray Linear Dichroism in Apatite. United States: N. p., 2018. Web. doi:10.1021/jacs.8b05547.
Stifler, Cayla A., Wittig, Nina Kølln, Sassi, Michel, Sun, Chang-Yu, Marcus, Matthew A., Birkedal, Henrik, Beniash, Elia, Rosso, Kevin M., & Gilbert, Pupa U. P. A. X-ray Linear Dichroism in Apatite. United States. doi:10.1021/jacs.8b05547.
Stifler, Cayla A., Wittig, Nina Kølln, Sassi, Michel, Sun, Chang-Yu, Marcus, Matthew A., Birkedal, Henrik, Beniash, Elia, Rosso, Kevin M., and Gilbert, Pupa U. P. A. Mon . "X-ray Linear Dichroism in Apatite". United States. doi:10.1021/jacs.8b05547. https://www.osti.gov/servlets/purl/1542317.
@article{osti_1542317,
title = {X-ray Linear Dichroism in Apatite},
author = {Stifler, Cayla A. and Wittig, Nina Kølln and Sassi, Michel and Sun, Chang-Yu and Marcus, Matthew A. and Birkedal, Henrik and Beniash, Elia and Rosso, Kevin M. and Gilbert, Pupa U. P. A.},
abstractNote = {The recent observation in parrotfish teeth of X-ray linear dichroism motivated an in-depth investigation into this spectroscopic effect in various apatite crystals, including geologic hydroxyapatite (Ca5(PO4)3OH), fluorapatite (Ca5(PO4)3F), and their biogenic counterparts in human bone, mouse enamel, and in parrotfish bone, dentin, and enameloid, the equivalent of dental enamel in certain fish. These data are important because they now enable visualization of the nano- to microscale structure of apatite crystals in teeth and bone. Polarization-dependent imaging contrast (PIC) maps of lamellar bone, obtained with a new method that minimizes space-charge and charging effects, show the expected rotating apatite crystal orientations. PIC maps of mouse enamel reveal a complex arrangement of hydroxyapatite crystals perpendicular to the dentin-enamel junction, with rods arranged in a decussation pattern in inner enamel and nearly parallel to one another in outer enamel. In both inner and outer enamel crystal c-axes are not always aligned with the rod elongation direction.},
doi = {10.1021/jacs.8b05547},
journal = {Journal of the American Chemical Society},
number = 37,
volume = 140,
place = {United States},
year = {2018},
month = {9}
}

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