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High-pressure study on lead fluorapatite
-
Xi Liu
,
Sean R. Shieh
Veröffentlicht/Copyright:
1. April 2015
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 pressurevolume data fitted to the third-order Birch-Murnaghan equation yield an isothermal bulk modulus (KT) of 54.3(18) GPa and the pressure derivative (K′T) of 8.1(6). If K′T 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.
Keywords: Lead fluorapatite; compressibility; synchrotron X-ray diffraction; isothermal bulk modulus; high pressure
Received: 2007-10-6
Accepted: 2008-4-1
Published Online: 2015-4-1
Published in Print: 2008-10-1
© 2015 by Walter de Gruyter Berlin/Boston
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Schlagwörter für diesen Artikel
Lead fluorapatite;
compressibility;
synchrotron X-ray diffraction;
isothermal bulk modulus;
high pressure
Artikel in diesem Heft
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- Amorphous Materials: Properties, structure, and durability: Oxidation state of iron in hydrous phono-tephritic melts
- Amorphous materials: Properties, structure, and durability: Quantitative Raman spectroscopy: Speciation of Na-silicate glasses and melts
- Dissolution-reprecipitation of zircon at low-temperature, high-pressure conditions (Lanzo Massif, Italy)
- High-pressure behavior of gypsum: A single-crystal X-ray study
- Presence and zoning of hydrous components in leucite from the Alban Hills volcano, Rome, Italy
- Herderite from Mogok, Myanmar, and comparison with hydroxyl-herderite from Ehrenfriedersdorf, Germany
- Application of Raman spectroscopy to quantify trace water concentrations in glasses and garnets
- Neutron diffraction study of δ-AlOOD at high pressure and its implication for symmetrization of the hydrogen bond
- A simple predictive model for the thermal expansion of AlSi3 feldspars
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- High-pressure Al-rich hexagonal phases—What are their kin?
- Leucite at high pressure: Elastic behavior, phase stability, and petrological implications
- Thermodynamic mixing properties of Rb-K feldspars
- Demicheleite, BiSBr, a new mineral from La Fossa crater, Vulcano, Aeolian Islands, Italy
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