High-Pressure Study on Lead Fluorapatite

Liu, X; Shieh, S; Fleet, M; Akhmetov, A

doi:10.2138/am.2008.2816

Title: High-Pressure Study on Lead Fluorapatite

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Abstract

The compressional behavior of a synthetic lead fluorapatite [Pb9.35(PO4)6F2] 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 [Ca10(PO4)6F2], chlorapatite [Ca10(PO4)6Cl2], and hydroxylapatite [Ca10(PO4)6(OH)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 (KT) of 54.3(18) GPa and the pressure derivative (KT') of 8.1(6). If KT' is fixed at 4, the obtained KT is 68.4(16) GPa, which is approximately only two-thirds of the isothermal bulk modulus of the calcium apatites.

Authors:: Liu, X; Shieh, S; Fleet, M; Akhmetov, A

Publication Date:: Tue Jan 01 00:00:00 EST 2008

Research Org.:: Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source

Sponsoring Org.:: Doe - Office Of Science

OSTI Identifier:: 980239

Report Number(s):: BNL-93157-2010-JA
Journal ID: ISSN 0003-004X; AMMIAY; TRN: US1005447

DOE Contract Number:: DE-AC02-98CH10886

Resource Type:: Journal Article

Journal Name:: American Mineralogist

Additional Journal Information:: Journal Volume: 93; Journal ID: ISSN 0003-004X

Country of Publication:: United States

Language:: English

Subject:: 43 PARTICLE ACCELERATORS; APATITES; CALCIUM; COMPRESSIBILITY; DIAMONDS; LEAD; PRESSURE RANGE GIGA PA; SYNCHROTRONS; X-RAY DIFFRACTION; national synchrotron light source

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                    Liu, X, Shieh, S, Fleet, M, and Akhmetov, A. High-Pressure Study on Lead Fluorapatite.  United States: N. p., 2008. 
        Web.  doi:10.2138/am.2008.2816.

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                    Liu, X, Shieh, S, Fleet, M, & Akhmetov, A. High-Pressure Study on Lead Fluorapatite.  United States.  https://doi.org/10.2138/am.2008.2816

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                    Liu, X, Shieh, S, Fleet, M, and Akhmetov, A. 2008.  
        "High-Pressure Study on Lead Fluorapatite".  United States.  https://doi.org/10.2138/am.2008.2816.

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@article{osti_980239,

  title        = {High-Pressure Study on Lead Fluorapatite},

  author       = {Liu, X and Shieh, S and Fleet, M and Akhmetov, A},

  abstractNote = {The compressional behavior of a synthetic lead fluorapatite [Pb9.35(PO4)6F2] 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 [Ca10(PO4)6F2], chlorapatite [Ca10(PO4)6Cl2], and hydroxylapatite [Ca10(PO4)6(OH)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 (KT) of 54.3(18) GPa and the pressure derivative (KT') of 8.1(6). If KT' is fixed at 4, the obtained KT is 68.4(16) GPa, which is approximately only two-thirds of the isothermal bulk modulus of the calcium apatites.},

  doi          = {10.2138/am.2008.2816},

  url          = {https://www.osti.gov/biblio/980239},
  journal      = {American Mineralogist},

  issn         = {0003-004X},

  number       = ,

  volume       = 93,

  place        = {United States},

  year         = {Tue Jan 01 00:00:00 EST 2008},

  month        = {Tue Jan 01 00:00:00 EST 2008}

}

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