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High-pressure study on lead fluorapatite

Xi Liu, Sean R. Shieh, Michael E. Feet and Arslan Akhmetov
High-pressure study on lead fluorapatite
American Mineralogist (October 2008) 93 (10): 1581-1584

Abstract

The compressional behavior of a synthetic lead fluorapatite [Pb (sub 9.35) (PO (sub 4) ) (sub 6) F (sub 2) ] has been investigated in situ up to about 16.7 GPa at 300 K, using a diamond-anvil cell and synchrotron X-ray diffraction. We find that the compressibility of lead fluorapatite is significantly different from that of fluorapatite [Ca (sub 10) (PO (sub 4) ) (sub 6) F (sub 2) ], chlorapatite [Ca (sub 10) (PO (sub 4) ) (sub 6) Cl (sub 2) ], and hydroxylapatite [Ca (sub 10) (PO (sub 4) ) (sub 6) (OH) (sub 2) ]: lead fluorapatite is much more compressible, and elastically isotropic in the investigated pressure range. The pressure-volume data fitted to the third-order Birch-Murnaghan equation yield an isothermal bulk modulus (K (sub T) ) of 54.3(18) GPa and the pressure derivative (K (sub T) ') of 8.1(6). If K (sub T) ' is fixed at 4, the obtained K (sub T) is 68.4(16) GPa, which is approximately only two-thirds of the isothermal bulk modulus of the calcium apatites.


ISSN: 0003-004X
EISSN: 1945-3027
Coden: AMMIAY
Serial Title: American Mineralogist
Serial Volume: 93
Serial Issue: 10
Title: High-pressure study on lead fluorapatite
Affiliation: University of Western Ontario, Department of Earth Sciences, London, ON, Canada
Affiliation: University of Toronto, Department of Geology, Toronto, ON, Canada
Pages: 1581-1584
Published: 200810
Text Language: English
Publisher: Mineralogical Society of America, Washington, DC, United States
References: 24
Accession Number: 2009-001469
Categories: Mineralogy of non-silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table
Secondary Affiliation: CNRS-IPGP, FRA, France
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, copyright, Mineralogical Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 200901
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