Crystal structure, thermal expansivity, and elasticity of OH-chondrodite: trends among dense hydrous magnesium silicates

Ye, Yu; Jacobsen, S. D.; Mao, Zhu; Duffy, Thomas S.; Hirner, Sarah M.; Smyth, Joseph R.

doi:10.1007/s00410-015-1138-3

Cited by 14 publications

(34 citation statements)

References 64 publications

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“…Gibbs et al, 1970;Robinson et al, 1973;Yamamoto, 1977;Fujino and Takuchi, 1978;Ottolini et al, 2000;James, 2001, 2002;Friedrich et al, 2001Friedrich et al, , 2002Kuribayashi et al, 2004;Kunz et al, 2006;Ye et al, 2013Ye et al, , 2015. Natural chondrodite and clinohumite samples have been found in metamorphosed limestones and dolomites (Friedrich et al, 2002), as well as in serpentinized wehrlite .…”

Section: Chondrodite and Clinohumitementioning

confidence: 91%

“…Natural samples generally have various F  , Ti 4+ , Fe 2+ /Fe 3+ contents, and such ions have significant effect on the sizes of unit cells, due to their ionic radii: Fe 2+ >Mg 2+ > Fe 3+ >Ti 4+ for cations; O 2 >F  for anions. Without F  or Ti 4+ , the densities of synthetic samples (Yamamoto, 1977;Berry and James, 2001;Ye et al, 2013Ye et al, , 2015 are typically smaller than those of natural samples. In these DHMS phases, there are fixed numbers of protons (H + ) in the structure, and they are coordinated with specific O 2 sites.…”

Section: Chondrodite and Clinohumitementioning

confidence: 96%

“…On the other hand, some studies have been conducted for the P-V-T EoS of anhydrous forsterite, wadsleyite, and ringwoodite (Meng et al, 1993(Meng et al, , 1994Guyot et al, 1996;Li et al, 2001;Katsura et al, 2004Katsura et al, , 2009aKatsura et al, , 2009bCouvy et al, 2010). Some high-temperature measurements (at ambient pressure) have also been carried out for these DHMS and hydrous NAMs phases (Pawley et al, 1995: Inoue et al, 2004Ye et al, 2009Ye et al, , 2011Ye et al, , 2012Ye et al, , 2013Ye et al, , 2015, which are useful for establishing simultaneous P-V-T EoSs of these hydrous silicate minerals in the future. We will discuss the high-pressure and high-temperature experiments for EoSs in this section.…”

Section: Equations Of Statementioning

confidence: 98%

“…Some neutron diffraction experiments were also conducted for the refinements of proton positions in chondrodite and clinohumite (Berry and James, 2001;Friedrich et al, 2001;Kunz et al, 2006). Ye et al (2013Ye et al ( , 2015 refined the proton positions, using single-crystal X-ray diffraction (XRD), but with redundant reflection intensities (the number of unique reflection peaks is typically more than 1900 for each sample). The results from single-crystal XRD are basically consistent with those from neutron diffraction, and the refined H + positions are also shown in Figure 2c, e as small balls.…”

Section: Chondrodite and Clinohumitementioning

confidence: 99%

“…Weidner and Wang, 2000;Wang and Shen, 2014), with three important seismic discontinuities: (1) at 410-km discontinuity, olivine ( phase) transits into wadsleyite ( phase); (2) at 520-km discontinuity, wadsleyite transits into ringwoodite ( phase); (3) at the 660-km discontinuity, ringwoodite break down to bridgmanite Figure 1 The compositions of hydrous silicate minerals in the peridotite system (MgO-SiO 2 -Mg(OH) 2 ), taken from Ye et al (2015) (Mg, Fe)O), which is also known as the post-spinel phase transition, and 660-km discontinuity also serves as the boundary between the upper mantle and lower mantle. Hence, wadsleyite and ringwoodite, as the high-pressure polymorphs of olivine, play important roles in the physics and chemistry of the MTZ and the storage of water in planetary interiors.…”

Section: Introductionmentioning

confidence: 99%

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Hydration effects on crystal structures and equations of state for silicate minerals in the subducting slabs and mantle transition zone

2016

Sci. China Earth Sci.

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There are potentially huge amounts of water stored in Earth's mantle, and the water solubilities in the silicate minerals range from tens to thousands of part per minion (ppm, part per million). Exploring water in the mantle has attracted much attention from the societies of mineralogy and geophysics in recent years. In the subducting slab, serpentine breaks down at high temperature, generating a series of dense hydrous magnesium silicate (DHMS) phases, such as phase A, chondrodite, clinohumite, etc. These phases may serve as carriers of water as hydroxyl into the upper mantle and the mantle transition zone (MTZ). On the other hand, wadsleyite and ringwoodite, polymorphs of olivine, are most the abundant minerals in the MTZ, and able to absorb significant amount of water (up to about 3 wt.% H 2 O). Hence, the MTZ becomes a very important layer for water storage in the mantle, and hydration plays important roles in physics and chemistry of the MTZ. In this paper, we will discuss two aspects of hydrous silicate minerals: (1) crystal structures and (2) equations of state (EoSs). Keywords Hydrous silicate mineral, Crystal structure, Equation of state (EoS), Mantle transition zone (MTZ), Wadsleyite, Ringwoodite Citation: Ye Y. 2016. Hydration effects on crystal structures and equations of state for silicate minerals in the subducting slabs and mantle transition zone.

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Section: Chondrodite and Clinohumitementioning

confidence: 91%

Section: Chondrodite and Clinohumitementioning

confidence: 96%

Section: Equations Of Statementioning

confidence: 98%

Section: Chondrodite and Clinohumitementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hydration effects on crystal structures and equations of state for silicate minerals in the subducting slabs and mantle transition zone

2016

Sci. China Earth Sci.

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Thermal Equation of State of Natural Ti‐Bearing Clinohumite

Qin

Zhang

et al. 2017

JGR Solid Earth

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The natural occurrence of clinohumite in metabasalts and hydrothermally altered peridotites provides a source of water‐rich minerals in subducted slabs, making knowledge of their phase relations and crystal chemistry under high pressure‐temperature (P‐T) conditions important for understating volatile recycling and geodynamic process in the Earth's mantle. Here we present a synchrotron‐based, single‐crystal X‐ray diffraction study on two natural Ti‐bearing clinohumites up to ~28 GPa and 750 K in order to simulate conditions within subducted slabs. No phase transition occurs in clinohumite over this P‐T range. Pressure‐volume relationships of both compositions at room temperature were fitted to a third‐order Birch‐Murnaghan equation of state (EoS) with V0 = 650.4(3) Å3, KT0 = 141(4) GPa, and KT0′ = 4.0(6) for Ti‐poor clinohumite (0.07 Ti per formula unit, pfu) and V0 = 650.8(3) Å3, KT0 = 144(4) GPa, and KT0′ = 3.6(7) for Ti‐rich clinohumite (0.21 Ti pfu). Both clinohumites exhibit anisotropic compression with βb > βc > βa. We also refined P‐V‐T equation of state parameters using the high‐temperature Birch‐Murnaghan EoS, yielding (∂KT0/∂T)P = −0.040(10) GPa/K and αT = 5.1(6) × 10−5 K−1 for Ti‐poor clinohumite and (∂KT0/∂T)P = −0.045(11) GPa/K and αT = 5.7(6) × 10−5 K−1 for Ti‐rich clinohumite. Ti‐poor and Ti‐rich clinohumites display similar equations of state but are ~20% more incompressible than Mg‐pure clinohumite and display ~5% higher bulk sound velocity than olivine at upper mantle conditions. Our results provide constraints for modeling geodynamic process related to the subduction and transport of potentially water‐rich slabs in the mantle.

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Modification of hydroxyl silicates and its improvement on tribological properties of bismaleimides resin

Jia

Liu

et al. 2020

Surface & Interface Analysis

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In order to improve the dispersion and compatibility of the hydroxyl silicates (HNSs) in organic resin matrix, the HNSs were first functionalized by N‐(2‐aminoethyl)‐3‐aminopropyltrimethoxysilane (KH‐792) via a hydrolysis process; thus, the imino and amidogen groups can be grafted on the surface of HNSs (NH2‐HNSs). Fourier transform infrared spectroscopy, scanning electron microscopy, and X‐ray photoelectron spectroscopy are employed to characterize the chemical structure and surface morphology changes on the surface of HNSs after modified. The modified NH2‐HNSs were then used as fillers to add into bismaleimide (BMI) to prepare the new NH2‐HNSs/BMI composites. The influences of NH2‐HNSs content on the mechanical, tribological, and thermal properties of BMI resin were also researched. The results showed that adding NH2‐HNSs with appropriate content (6.0 wt%) could significantly improve the comprehensive properties of the NH2‐HNSs/BMI composites. It can be observed from the scanning electron microscopy (SEM) on the wear surface of the materials that, the wear mechanism of the BMI resin was converted from adhesive wear to abrasive wear after the addition of NH2‐HNSs. The improvement of tribological and mechanical properties can be mainly attributed to the chemical reaction between BMI and NH2‐HNSs.

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Crystal structure, thermal expansivity, and elasticity of OH-chondrodite: trends among dense hydrous magnesium silicates

Cited by 14 publications

References 64 publications

Hydration effects on crystal structures and equations of state for silicate minerals in the subducting slabs and mantle transition zone

Hydration effects on crystal structures and equations of state for silicate minerals in the subducting slabs and mantle transition zone

Thermal Equation of State of Natural Ti‐Bearing Clinohumite

Modification of hydroxyl silicates and its improvement on tribological properties of bismaleimides resin

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