Lyell Collection
Journal of the Geological Society
Lyell Centre  |   Lyell Collection  |   Subscriptions   |   Geological Society  |   Email alerts  |   Online bookshop  |   Help

Keywords:
Author:
Advanced search>>
This Article
Right arrow Full Text (PDF)
Right arrow References
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow Request Permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by McClellan, G. H.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation
Journal of the Geological Society; 1980; v. 137; issue.6; p. 675-681;
DOI: 10.1144/gsjgs.137.6.0675
© 1980 Geological Society of London

Article

Mineralogy of carbonate fluorapatites

Guerry H. McClellan

The principal phosphate mineral in sedimentary phosphorites is carbonate fluorapatite of the variety francolite. Francolites exhibit several systematic isomorphous substitutions including sodium and magnesium for calcium, carbonate for phosphate, fluorine for oxygen, and hydroxyl for fluorine. These substitutions result in measurable variations of the crystallographic properties including unit-cell parameters and optical indices. Statistical models have been developed to relate compositional and crystallographic variations in the various francolites. Previous work has shown that francolite compositions are metastable with respect to fluorapatite. The effects of weathering, metamorphism and geological time causing systematic changes in francolite compositions are used as examples of these relationships.




This article has been cited by other articles:


Home page
 American MineralogistHome page
M. E. Fleet and X. Liu
Accommodation of the carbonate ion in fluorapatite synthesized at high pressure
American Mineralogist, 2008; 93: 1460 - 1469.
[Abstract] [Full Text] [PDF]

Home page
 PALAIOSHome page
Carnivore Coprolites from the Upper Triassic Ischigualasto Formation, Argentina: Chemistry, Mineralogy, and Evidence for Rapid Initial Mineralization
Palaios, 2005; 20: 51 - 63.


Home page
 Can MineralHome page
M. C. M. De Toledo, S. L.R. Lenharo, V. C. Ferrari, F. Fontan, P. De Parseval, and G. Leroy
THE COMPOSITIONAL EVOLUTION OF APATITE IN THE WEATHERING PROFILE OF THE CATALAO I ALKALINE-CARBONATITIC COMPLEX, GOIAS, BRAZIL
Can Mineral, 2004; 42: 1139 - 1158.
[Abstract] [Full Text] [PDF]

Home page
 Reviews in Mineralogy and GeochemistryHome page
A. C. Knudsen and M. E. Gunter
Sedimentary Phosphorites--An Example: Phosphoria Formation, Southeastern Idaho, U.S.A.
Reviews in Mineralogy and Geochemistry, 2002; 48: 363 - 389.
[Full Text] [PDF]

Home page
 Geological Society, London, Special PublicationsHome page
A. J. G. Notholt
Phosphate rock: factors in economic and technical evaluation
Geological Society, London, Special Publications, 1994; 79: 53 - 65.
[Abstract] [PDF]

Home page
 Journal of the Geological SocietyHome page
G. H. McCLELLAN and S. J. VAN KAUWENBERGH
Mineralogical and chemical variation of francolites with geological time
Journal of the Geological Society, 1991; 148: 809 - 812.
[Abstract] [PDF]

Home page
 Geological Society, London, Special PublicationsHome page
P. J. Cook, J. H. Shergold, W. C. Burnett, and S. R. Riggs
Phosphorite research: a historical overview
Geological Society, London, Special Publications, 1990; 52: 1 - 22.
[Abstract] [PDF]

Home page
 Geological Society, London, Special PublicationsHome page
G. H. McClellan and S. J. Van Kauwenbergh
Mineralogy of sedimentary apatites
Geological Society, London, Special Publications, 1990; 52: 23 - 31.
[Abstract] [PDF]

Home page
 Geological Society, London, Special PublicationsHome page
J. Lucas, E. M. El Faleh, and L. Prevot
Experimental study of the substitution of Ca by Sr and Ba in synthetic apatites
Geological Society, London, Special Publications, 1990; 52: 33 - 47.
[Abstract] [PDF]

Home page
 Geological Society, London, Special PublicationsHome page
G. W. O'Brien, A. R. Milnes, H. H. Veeh, D. T. Heggie, S. R. Riggs, D. J. Cullen, J. F. Marshall, and P. J. Cook
Sedimentation dynamics and redox iron-cycling: controlling factors for the apatite--glauconite association on the East Australian continental margin
Geological Society, London, Special Publications, 1990; 52: 61 - 86.
[Abstract] [PDF]

Home page
 Geological Society, London, Special PublicationsHome page
S. J. Van Kauwenbergh and G. H McClellan
Comparative geology and mineralogy of the southeastern United States and Togo phosphorites
Geological Society, London, Special Publications, 1990; 52: 139 - 155.
[Abstract] [PDF]

Home page
 Geological Society, London, Special PublicationsHome page
R. D. A. Smith
Early diagenetic phosphate cements in a turbidite basin
Geological Society, London, Special Publications, 1987; 36: 141 - 156.
[Abstract] [PDF]