Hostname: page-component-586b7cd67f-l7hp2 Total loading time: 0 Render date: 2024-11-23T02:51:50.831Z Has data issue: false hasContentIssue false
  • English
  • Français

Powder neutron diffraction studies of a carbonate fluorapatite

Published online by Cambridge University Press:  31 January 2011

Th. Leventouri ,
B. C. Chakoumakos ,
H. Y. Moghaddam  and
V. Perdikatsis
Th. Leventouri
Affiliation:
Physics Department, Florida Atlantic University, Boca Raton, Florida 33431
B. C. Chakoumakos
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6393
H. Y. Moghaddam
Affiliation:
Physics Department, Florida Atlantic University, Boca Raton, Florida 33431
V. Perdikatsis
Affiliation:
Institute of Geology and Mineral Exploration, Messogion 70, 11527 Athens, Greece
Get access

Abstract

Atomic positional disorder of a single-phase natural carbonate fluorapatite (francolite) is revealed from analysis of the atomic displacement parameters (ADPs) refined from neutron powder diffraction data as a function of temperature and carbonate content. The ADPs of the francolite show a strong disturbance at the P, O3, and F sites. When it is heat treated to partially or completely remove the carbonate, the ADPs as well as the other structural parameters resemble those of a fluorapatite (Harding pegmatite) that was measured under the same conditions. The various structural changes are consistent with a substitution mechanism whereby the planar carbonate group replaces a phosphate group and lies on the mirror plane of the apatite structure.

Type
Articles
Information
Journal of Materials Research , Volume 15 , Issue 2 , February 2000 , pp. 511 - 517
Copyright
Copyright © Materials Research Society 2000

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1.Elliott, J.C., Structure and Chemistry of the Apatites and Other Calcium Orthophosphates (Elsevier, Amsterdam, 1994).Google Scholar
2.Skinner, H.C.W, in Origin, Evolution and Modern Aspects of Biomineralization in Plants and Animals, edited by Crick, R.E. (Plenum Press, New York, 1989), p. 251.Google Scholar
3.Suchanek, W. and Yoshimura, M., J. Mater. Res. 13, 94 (1998).CrossRefGoogle Scholar
4.Fleischer, R.L., Price, P.B., and Walker, R.M., in Nuclear Tracks in Solids (University of California Press, Berkeley, CA, 1975), p. 605.CrossRefGoogle Scholar
5.Schuffert, J.D., Kastner, M., Emanuele, G., and Jahnke, R.A., Geochim. Cosmochim. Acta 54, 2323 (1990).CrossRefGoogle Scholar
6.Shemesh, A., Geochim. Cosmochim. Acta 54, 2433 (1990).CrossRefGoogle Scholar
7.Tomson, M.B. and Vignona, L., in Phosphate Minerals, edited by Nriagu, J.O. and Moore, P.B. (Springer Verlag, New York, 1984), p. 386.CrossRefGoogle Scholar
8.Hendricks, S.B., Jefferson, M.E., and Mosley, V.M., Z. Kristallogr. 81, 352 (1932).CrossRefGoogle Scholar
9.Mehmel, H., Z. Phys. Chem 15B, 223 (1931).CrossRefGoogle Scholar
10.Hendricks, S.B., Science 96, 255 (1942).CrossRefGoogle Scholar
11.McConnell, D. and Foreman, D.W., Inorg. Chem. 17, 2039 (1978).CrossRefGoogle Scholar
12.McConnell, D. and Cruner, J.W., Am. Mineral. 25, 157 (1940).Google Scholar
13.McConnell, D., Bull. Soc. Fr. Mineral. Crystallogr. 75, 428 (1952).Google Scholar
14.Culbrandsen, R.A., Kramer, I.R., Beatty, L.B. and Mays, R.E., Am. Mineral. 51, 819 (1966).Google Scholar
15.McClellan, G.H., J. Geol. Soc. 137, 675 (1980).CrossRefGoogle Scholar
16.Binder, G. and Troll, G., Contrib. Mineral. Petrol. 101, 394 (1989).CrossRefGoogle Scholar
17.Roux, P., Bonel, G., and Dechambre, G., Bull. Mineral. 102, 425 (1978).Google Scholar
18.Bacquet, G., Truong, V.Q., Bonel, G., and Vignoles, M., J. Solid State Chem. 33, 189 (1980).CrossRefGoogle Scholar
19.Stadler, H.J., Dissertation, Universität Karlsruhe, Karlsruhe, Germany (1981).Google Scholar
20.Carlström, D., Acta Radiol. Suppl. 121, 121 (1955).Google Scholar
21.Driessens, F.C.M, Verbeeck, R.M.H, and Keikens, P., Z. Anorg. Allg. Chemie 504, 195 (1983).CrossRefGoogle Scholar
22.Perdikatsis, V., Mater. Sci. Forum 79–82, 809 (1991).CrossRefGoogle Scholar
23.Leventouri, Th., Chakoumakos, B.C., Moghaddam, H.Y., and Perdikatsis, V., Mater. Sci. Forum 321, 924 (1999).Google Scholar
24.Sänger, A.T. and Kuhs, W.F., Z. Kristallogr. 199, 123 (1992).CrossRefGoogle Scholar
25.Larson, A.C. and Von Dreele, R.B., Los Alamos National Laboratory Report (1986), LAUR 86–748, version MS-DOS 7/15/99.Google Scholar
26.Bacon, G.E., Neutron Diffraction (Clarendon Press, Oxford, 1975), p. 363.Google Scholar
27. Singlecrystal neutron diffraction study, Chakoumakos, B.C. (unpublished).Google Scholar