Determination of the bulk modulus of hydroxycancrinite, a possible zeolitic precursor in geopolymers, by high-pressure synchrotron X-ray diffraction

The equation of state (EOS) of HfC and nanosized TiC at high pressure has been studied by means of synchrotron radiation X-ray diffraction (XRD) in a diamond anvil cell (DAC) at ambient temperature, and density functional theory (DFT) calculations. XRD analysis showed that the cubic structure of HfC and nanosized TiC maintained to the maximum pressures. The XRD data yield a bulk modulus [Formula: see text] GPa with [Formula: see text] of HfC. In addition, the bulk modulus of nanosized TiC derived from XRD data is [Formula: see text] GPa with [Formula: see text].

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Elastic Properties of Calcium Oxide Perovskites

MRS Proceedings ◽

10.1557/proc-718-d2.4 ◽

2002 ◽

Vol 718 ◽

Cited By ~ 2

Author(s):

Nancy L. Ross ◽

Ross J. Angel ◽

Jennifer Kung ◽

Tracey D. Chaplin

Keyword(s):

High Pressure ◽

Bulk Modulus ◽

Calcium Oxide ◽

Specific Volume ◽

Equations Of State ◽

X Ray Diffraction ◽

X Ray ◽

Threefold Increase ◽

Volume Relationship ◽

Brownmillerite Structure

AbstractThe equations of state and axial moduli of the CaBO3 perovskites (B=Zr,Sn,Ti,Ge) and CaFeO2.5 with the brownmillerite structure have been determined using high-pressure, singlecrystal X-ray diffraction. The bulk modulus-specific volume relationship for the Ca-perovskites is nonlinear, with CaSnO3 and CaZrO3 displaying anomalous stiffening (higher bulk moduli) than previously reported and predicted [1,2]. The axial moduli of the a- and c-axes decrease steadily by ∼30% from the least-distorted of the Pbnm perovskites, CaGeO3, to the most distorted, CaZrO3, while the b-axis shows little change. The net result is a threefold increase in the anisotropy of the axial moduli of CaSnO3 and CaZrO3 (∼21%) relative to CaGeO3 and CaTiO3 (∼4-8%). The bulk modulus of CaFeO2.5 falls significantly below the trend for the stoichiometric perovskites. The introduction of 1/6 vacancies on the oxygen positions softens the perovskite structure by 25%.

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In situ determination of the spinel-post-spinel transition in Fe3O4 at high pressure and temperature by synchrotron X-ray diffraction

American Mineralogist ◽

10.2138/am.2011.3642 ◽

2011 ◽

Vol 96 (5-6) ◽

pp. 820-827 ◽

Cited By ~ 4

Author(s):

K. Schollenbruch ◽

A. B. Woodland ◽

D. J. Frost ◽

Y. Wang ◽

T. Sanehira ◽

...

Keyword(s):

High Pressure ◽

X Ray Diffraction ◽

High Pressure And Temperature ◽

X Ray

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Compressibility of the high-pressure polymorph of AlOOH to 17 GPa

Mineralogical Magazine ◽

10.1180/minmag.2009.073.3.479 ◽

2009 ◽

Vol 73 (3) ◽

pp. 479-485 ◽

Cited By ~ 16

Author(s):

A. Suzuki

Keyword(s):

High Pressure ◽

Equation Of State ◽

Neutron Diffraction ◽

Bulk Modulus ◽

Diffraction Study ◽

Neutron Diffraction Study ◽

X Ray Diffraction ◽

Pressure Derivative ◽

X Ray ◽

A Value

AbstractThe equation of state of δ-AlOOH was investigated using powder X-ray diffraction up to 17 GPa. Measurement of the volume at 300 K gave a value of the bulk modulus of K0 = 124(2) GPa, whereas its pressure derivative was K’ = 13.5(7). The b axis of the unit cell is more compressible than the a and c axes – in agreement with a neutron diffraction study at high pressure by Sano-Furukawa et al. (2008). Measurements presented here show that δ-AlOOH has a compressibility 200% higher than in the previously reported equation of state by Vanpeteghem et al. (2002).

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In situ determination of crystal structure for high pressure phase of ZrO2 using a diamond anvil and single crystal X-ray diffraction method

Physics and Chemistry of Minerals ◽

10.1007/bf00308274 ◽

1986 ◽

Vol 13 (4) ◽

pp. 233-237 ◽

Cited By ~ 138

Author(s):

Y. Kudoh ◽

H. Takeda ◽

H. Arashi

Keyword(s):

Crystal Structure ◽

High Pressure ◽

Single Crystal ◽

Diffraction Method ◽

X Ray Diffraction ◽

X Ray ◽

Diamond Anvil ◽

Pressure Phase

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X-ray diffraction study of HgBa2CuO4+δ at high pressures

Powder Diffraction ◽

10.1017/s0885715600009544 ◽

1997 ◽

Vol 12 (2) ◽

pp. 106-112

Author(s):

Eduardo J. Gonzalez ◽

Winnie Wong-Ng ◽

Gasper J. Piermarini ◽

Christian Wolters ◽

Justin Schwartz

Keyword(s):

High Pressure ◽

Bulk Modulus ◽

Pressure Range ◽

High Pressures ◽

Anisotropy Ratio ◽

X Ray Diffraction ◽

X Ray ◽

Anisotropic Elastic ◽

High Pressure Study

An in situ high pressure study using energy dispersive X-ray diffraction has been carried out on the polycrystalline high-Tc superconductor, HgBa2CuO4+δ (Hg-1201), to study its phase stability under pressure and also to measure its compressibility and bulk modulus. No evidence of pressure-induced polymorphism was found in the pressure range investigated, i.e., from 0.1 MPa (1 atm) to 5 GPa. The compound exhibited anisotropic elastic properties. The axial compressibility along the c axis was measured to be (3.96±0.35)×10−3GPa−1 and along the a axis (3.42±0.13)×10−3GPa−1, corresponding to an anisotropy ratio of 1.16±0.11. The bulk modulus was determined to be (94.7±4.2) GPa and, assuming a Poisson's ratio of 0.2, Young's modulus was estimated to be (170±8) GPa.

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High Pressure Brillouin Spectroscopy and X-ray Diffraction of Cerium Dioxide

Materials ◽

10.3390/ma14133683 ◽

2021 ◽

Vol 14 (13) ◽

pp. 3683

Author(s):

Mungo Frost ◽

John D. Lazarz ◽

Abraham L. Levitan ◽

Vitali B. Prakapenka ◽

Peihao Sun ◽

...

Keyword(s):

High Pressure ◽

Bulk Modulus ◽

Cerium Dioxide ◽

Room Temperature ◽

Nanocrystalline Powders ◽

X Ray Diffraction ◽

Brillouin Spectroscopy ◽

X Ray ◽

Nanocrystalline Cerium Dioxide ◽

Acoustic Velocities

Simultaneous high-pressure Brillouin spectroscopy and powder X-ray diffraction of cerium dioxide powders are presented at room temperature to a pressure of 45 GPa. Micro- and nanocrystalline powders are studied and the density, acoustic velocities and elastic moduli determined. In contrast to recent reports of anomalous compressibility and strength in nanocrystalline cerium dioxide, the acoustic velocities are found to be insensitive to grain size and enhanced strength is not observed in nanocrystalline CeO2. Discrepancies in the bulk moduli derived from Brillouin and powder X-ray diffraction studies suggest that the properties of CeO2 are sensitive to the hydrostaticity of its environment. Our Brillouin data give the shear modulus, G0 = 63 (3) GPa, and adiabatic bulk modulus, KS0 = 142 (9) GPa, which is considerably lower than the isothermal bulk modulus, KT0∼ 230 GPa, determined by high-pressure X-ray diffraction experiments.

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