High-pressure study on lead fluorapatite

Liu, Xi; Shieh, Sean R.; Fleet, Michael E.; Akhmetov, A. F.

doi:10.2138/am.2008.2816

Cited by 28 publications

(10 citation statements)

References 18 publications

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“…To determine the experimental pressure by the ruby fluorescence method (Mao et al 1978), a couple of tiny ruby balls were loaded with the sample. The experimental techniques used here were almost identical to those reported in Liu et al (2008), with the only exceptions that an online CCD detector rather than an image plate was used to collect the X-ray diffraction patterns and longer data-collecting times (20 min) were used. The hexagonal unit-cell parameters of the carbonated hydroxylapatites at different pressures were calculated by refining the unit cells using the diffraction peaks 200,111,002,102,210,211,112,300,202,301,212,310,311,113,203,222,312,123,321,410,402, and 004, whose positions were determined by full spectrum refinement of powder X-ray patterns.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…2). In comparison, the dependence of a and c on pressure is linear for calcium fluorapatite but quadratic for lead fluorapatite (Comodi et al 2001;Matsukage et al 2004;Liu et al 2008;Fleet et al 2010). Similarly, the dependence of the volume on pressure can be empirically fitted as: V = 528.4(5) -5.5(2)P + 0.09(3)P 2 for LM006, whereas V = 526.8(7) -6.5(3)P + 0.17(3) P 2 for LM005.…”

Section: Effects Of Carbonate On the Cell Parameter And Elastic Anisomentioning

confidence: 99%

“…So far, compression experiments have been carried out to investigate the compressibility of fluorapatite, hydroxylapatite, and chlorapatite (Brunet et al 1999;Comodi et al 2001;Matsukage et al 2004), but no comparable work has been done on the carbonated apatite. Additional closely-related experimental studies include Liu et al (2008) [lead fluorapatite Pb 10 (PO 4 ) 6 F 2 ] and Fleet et al (2010) (lead fluorapatite), and Zhai et al (2009) [γ-tricalcium phosphate γ-Ca 3 (PO 4 ) 2 , the main breakdown product of apatite].…”

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confidence: 99%

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Equation of state of carbonated hydroxylapatite at ambient temperature up to 10 GPa: Significance of carbonate

Liu

Shieh

Fleet

et al. 2010

American Mineralogist

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The incorporation of the carbonate ion into the crystal structure of hydroxylapatite results in the creation of vacancies, oxygen-loss, and disorder, with consequent changes in physical and chemical properties. High-pressure experimental investigation up to 10 GPa of two synthetic carbonated hydroxylapatite samples with up to 11 wt% CO 3 , using a diamond-anvil cell and synchrotron powder X-ray diffraction, provides the first rigorous assessment of the mechanical behavior of the carbonated hydroxylapatite. The pressure-volume data suggest that the isothermal bulk modulus of these carbonated hydroxylapatites has been significantly decreased by the presence of the carbonate (up to about 15%), which in turn will affect all the carbonated apatite-related reactions in the geosystem. Since hydroxylapatite is one of the major components of the bones and teeth, the incorporation of the carbonate in the hydroxylapatite weakens teeth and bones not only chemically, but also physically.

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Section: Experimental Methodsmentioning

confidence: 99%

Section: Effects Of Carbonate On the Cell Parameter And Elastic Anisomentioning

confidence: 99%

mentioning

confidence: 99%

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Equation of state of carbonated hydroxylapatite at ambient temperature up to 10 GPa: Significance of carbonate

Liu

Shieh

Fleet

et al. 2010

American Mineralogist

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“…The X-ray diffraction patterns were later processed with the Fit2D program to generate the conventional one-dimension profile [21]. These high-P experimental and data-processing techniques have been well established and used in our previous experimental investigations [22][23][24][25][26]. The hexagonal unit-cell parameters of the CAS phase at different pressures were calculated by refining the unit cells using the strongest diffraction peaks 101, 102, 004, 110, 104, 112, 202, 203, 206, 214 and 302, whose positions were determined by a full spectrum refinement of the powder X-ray patterns.…”

Section: Methodsmentioning

confidence: 99%

Equation of state of CAS phase to pressure of the uppermost lower mantle at ambient temperature

Deng

et al. 2011

Sci. China Earth Sci.

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The CAS phase is a major constituent phase for the continental crust and basaltic compositions at the P-T conditions of the Earth's mantle, and potentially plays an important role in the geodynamic processes related to slab subduction. Its equation of state has been investigated here at ambient temperature up to about 25 GPa by using a diamond-anvil cell and synchrotron Xray radiation. Its P-V data, fitted to the third-order Birch-Murnaghan equation, yield an isothermal bulk modulus (K T ) of 185 (9) GPa and first pressure derivative ( T K ′ ) of 7.2 (12). If T K ′ is fixed at 4, the derived K T is 212 (4) GPa. Additionally, the CAS phase is strongly elastically anisotropic, with its a-axis direction much less compressible than c-axis direction: K T-a : K T-c = 2.19. anisotropic elasticity, CAS phase, equation of state, synchrotron X-ray radiation Citation: Liu X, He Q, Deng L W, et al. Equation of state of CAS phase to pressure of the uppermost lower mantle at ambient temperature.

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“…Lead apatites are recently intensively studied due to their significance in the environmental cycle of Pb and As [1][2][3][4][5][6][7][8][9][10][11]. Existing data related to lead hydroxyl apatites with arsenate substitution -forming hydroxyl analogs of pyromorphite-mimetite seriesare rather superficial and outdated.…”

Section: Introductionmentioning

confidence: 99%

Arsenate substitution in lead hydroxyl apatites: A Raman spectroscopic study

Giera

Manecki

Bajda

et al. 2016

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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A total of seven compounds of the hydroxylpyromorphite Pb10(PO4)6(OH)2 - hydroxylmimetite Pb10(AsO4)6(OH)2 (HPY-HMI) solid solution series were synthesized at 80°C from aqueous solutions and characterized using Raman spectroscopy. The positions of the bands in all spectra of the series depend on the content of arsenates and phosphates shifting to lower wavenumbers with substitution of (AsO4)(3-) for (PO4)(3-). This shift results from the decreasing bond strength of X-O (where X=P, As) and higher atomic mass of As than P. The position and intensity of major (PO4)(3-) and (AsO4)(3-) bands in Raman spectra exhibit linear correlation with As content, while the ratio of the intensities of these peaks shows exponential correlation. This results due to different polarizability of (PO4)(3-) and (AsO4)(3-) molecules. A small carbonate band develops with increasing As content indicating that hydroxyl lead apatites adopt the (CO3)(2-) ions, particularly at the arsenate end of the series.

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High-pressure study on lead fluorapatite

Cited by 28 publications

References 18 publications

Equation of state of carbonated hydroxylapatite at ambient temperature up to 10 GPa: Significance of carbonate

Equation of state of carbonated hydroxylapatite at ambient temperature up to 10 GPa: Significance of carbonate

Equation of state of CAS phase to pressure of the uppermost lower mantle at ambient temperature

Arsenate substitution in lead hydroxyl apatites: A Raman spectroscopic study

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