Compressibility and thermal expansivity of synthetic apatites, Ca5(PO4)3X with X = OH, F and Cl

Brunet, Fabrice; Allan, David R.; Redfern, Simon A. T.; Angel, Ross J.; Miletich, Ronald; Reichmann, H. J.; Sergent, José; Hanfland, Michael

doi:10.1127/ejm/11/6/1023

Cited by 80 publications

(79 citation statements)

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“…The compressibility along a was greater compared to the one measured along c. Unit-cell parameters showed a linear variation with P and their calculated linear compressibility coefficients give β :β = 1.38:1. Volume compressibility data fitted with BM3 EoS gave a bulk modulus of K = 93 (Table 1), whereas data fitted with BM2 EoS gave a bulk modulus of K = 97.8 GPa, in good accord with the value obtained by Brunet et al (1999) in their fluorapatite, although the latter contained 0.025 apfu hydroxyl.…”

Section: Introductionsupporting

confidence: 67%

“…Understanding its stability at the Earth's interior is essential to grasp its role as a possible repository of phosphorous at mantle depths. Beside its potential application to mantle mineralogy, knowledge of the apatite Equation of State (EoS) is also relevant to metamorphic petrologic applications such as interpreting pressure-temperaturetime paths (Brunet et al 1999;Ashley et al 2017). Apatite has many geological uses, including dating techniques and studies of the variation of rare-earth elements in rocks, and is also widely used in material science (Hughes 2015 and references therein).…”

Section: Introductionmentioning

confidence: 99%

“…Literature results are listed in Table 1 to compare the bulk modulus and the volume variations between the previous studies for apatite species and our results for carbonate-bearing fluorapatite (CFAP). Allan et al (1996) and Brunet et al (1999) studied the compressibility of three synthetic crystals of FAP, HAP, and CAP up to maximum pressures of 18, 20 and 52 GPa, respectively, at ambient temperature, by high-pressure synchrotron X-ray powder diffraction. Regardless of the large P-range, only the unit-cell volumes measured to about 10 GPa were used to derive their EoS, because higher-pressure data were affected by non-hydrostatic effects.…”

Section: Introductionmentioning

confidence: 99%

“…With regard to the elastic behavior of apatites, several compression experiments are done (Brunet et al 1999;Comodi et al 2001;Matsukage et al 2004;Schouwink et al 2010;Liu et al 2011) in Table 1 to investigate the compressibility of synthetic and natural apatite. Literature results are listed in Table 1 to compare the bulk modulus and the volume variations between the previous studies for apatite species and our results for carbonate-bearing fluorapatite (CFAP).…”

Section: Introductionmentioning

confidence: 99%

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The effect of type-B carbonate content on the elasticity of fluorapatite

Cámara¹,

Curetti²,

Benna³

et al. 2018

Phys Chem Minerals

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The mechanical behavior of carbonate-bearing fluorapatite (CFAP) (with up to 5.5 wt% CO ) was investigated at high pressure up to 7 GPa. (Framont region, France). Preliminary characterization at ambient conditions was done by single-crystal X-ray diffraction study. The structure refinements, in space group P6 /m, confirm a type-B substitution of the phosphate (PO ) group by the carbonate ion (CO ) . The site occupancies for the C atom are 0.04 for FOW and 0.11 for FRA CFAP, in quite good agreement with the 1.6 and 5.5 wt% CO amount obtained by analytical methods. Single-crystal high-pressure XRD study on the two type-B CFAP samples was performed. The FOW and FRA crystals were mounted concurrently in a ETH-type DAC and cell parameters were determined at 26 different pressures up to 6.86 GPa at room T. The variation with pressure of the unit-cell parameters and volume shows no discontinuity that could be related to any possible phase transition in the P range investigated. The linear compressibility coefficients are β = 3.63 × 10 GPa and β = 2.47 × 10 GPa for FOW, and β = 3.67 × 10 GPa and β = 2.65 × 10 GPa for FRA, giving an axial anisotropy of β :β = 1.47:1 and 1.38:1, respectively. The P-V data were fitted by a second-order Birch-Murnaghan EoS and the resulting BM2-EoS coefficients are V = 519.81(7) Å , K = 92.1(3) GPa for FOW, and V = 518.95(9) Å , K = 89.1(4) GPa for FRA CFAP. The results obtained indicate that a 5.5 wt% CO content (type-B) reduces the isothermal bulk modulus by about 9%.

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Section: Introductionsupporting

confidence: 67%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The effect of type-B carbonate content on the elasticity of fluorapatite

Cámara¹,

Curetti²,

Benna³

et al. 2018

Phys Chem Minerals

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“…First, as a consequence of its more compact structure and higher mechanical stability, FAP appears to be slightly stiffer and stronger than HAP, as reported by Enax et al 27 who measured higher values of E r and H in FAP single crystals in comparison to HAP. Other evidences of higher modulus in FAP have been obtained using nanomechanical 28 and acoustic emission microscopy techniques 29 . Furthermore, fluoride ions have been reported to enhance the matrix protein-mineral interaction and to facilitate packing and organization of apatite crystal arrays 30 .…”

Section: Discussionmentioning

confidence: 99%

Textured fluorapatite bonded to calcium sulphate strengthen stomatopod raptorial appendages

et al. 2014

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Stomatopods are shallow-water crustaceans that employ powerful dactyl appendages to hunt their prey. Deployed at high velocities, these hammer-like clubs or spear-like devices are able to inflict substantial impact forces. Here we demonstrate that dactyl impact surfaces consist of a finely-tuned mineral gradient, with fluorapatite substituting amorphous apatite towards the outer surface. Raman spectroscopy measurements show that calcium sulphate, previously not reported in mechanically active biotools, is co-localized with fluorapatite. Ab initio computations suggest that fluorapatite/calcium sulphate interfaces provide binding stability and promote the disordered-to-ordered transition of fluorapatite. Nanomechanical measurements show that fluorapatite crystalline orientation correlates with an anisotropic stiffness response and indicate significant differences in the fracture tolerance between the two types of appendages. Our findings shed new light on the crystallochemical and microstructural strategies allowing these intriguing biotools to optimize impact forces, providing physicochemical information that could be translated towards the synthesis of impact-resistant functional materials and coatings.

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Linear optical properties and Raman spectroscopy of natural fluorapatite

Becker

Libowitzky

Kleinschrodt³

et al. 2016

Crystal Research and Technology

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Precision refractive indices and their dispersion in the visible and near IR range (430 -2400 nm) and thermal expansion (including its anisotropy and temperature dependence between 144 K and 673 K) were determined for gem-quality crystals of fluorapatite from Durango, Mexico. In addition, results of a polarized Raman spectroscopy study on these crystals are given. Fluorapatite crystals show moderate values of thermal expansion with small anisotropy. The linear optical properties of the crystals allow no phase matching for third harmonic generation, but signalize, together with the Raman characteristics, a potential suitability of fluorapatite as nonlinear optical material for χ (3) -based stimulated Raman scattering.

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Compressibility and thermal expansivity of synthetic apatites, Ca5(PO4)3X with X = OH, F and Cl

Cited by 80 publications

References 0 publications

The effect of type-B carbonate content on the elasticity of fluorapatite

The effect of type-B carbonate content on the elasticity of fluorapatite

Textured fluorapatite bonded to calcium sulphate strengthen stomatopod raptorial appendages

Linear optical properties and Raman spectroscopy of natural fluorapatite

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