zr and ba isotopic compositions of high-density

Petrological and Geochemical Study of Sundoro Volcano,

C -type has high 87 Sr/ 86 Sr and Pb- isotopic compositions . Open system differentiation processes were recorded in the Pb isotopic compositions change through progressive differentiation indices. Shifting of wide range bimodal plagioclase core compositions from mafic rich in the basaltic samples to felsic rich in the andesitic one suggests for magma mixing process.

Zirconium

Zirconium is a corrosion resistant metal that is used in high performance pumps and valves. Since it also does not easily absorb neutrons, zirconium is widely used in nuclear reactors. The nuclear power industry uses nearly 90% of the zirconium produced each year, which must be nearly free of hafnium.

Zirconium

Zirconium is a chemical element with the symbol Zr and atomic number 40. The name zirconium is taken from the name of the mineral zircon (the word is related to Persian zargun (zircon; zar-gun, gold-like or as gold)), the most important source of zirconium.[5] It is a lustrous, grey-white, strong transition metal that closely resembles

Phys. Rev. Materials 5, 013603 (2021)

Boron arsenide (c − BAs) is at the forefront of research on ultrahigh thermal conductivity materials. We present a Raman scattering study of isotopically tailored cubic boron arsenide single crystals for 11 isotopic compositions spanning the range from nearly pure c − BAs 10 to nearly pure c − BAs 11..

Geochronology,Geochemistry and Zircon Hf Isotopic

The Lakang'e Cu-Mo deposit is a typical porphyry deposit in the eastern Gangdese metallogenic belt,on which previous geochemical studies are not adequate and systematic.In this paper,we present the results of the systematic logging of drillholes and provide new

CiteSeerX — and

The isotopic ratio trends may be extrapolated beyond the Ridge flank basalts (which have 143Nd/144Nd of 0.51270 and 87Sr/86Sr of 0.70417) in the direction of typical MORB compositions. These isotopic correlations are equally consistent with mixing of depleted and enriched end-member melts or partial melting of an inhomogeneous, variably enriched mantle source.

Toward complete isotopic analysis of individual presolar

article{osti_768572, title = {Toward complete isotopic analysis of individual presolar silicon carbide grains : C, N, Si, Sr, Zr, Mo, and Ba in single grains of type X.}, author = {Pellin, M J and Calaway, W F and Davis, A M and Lewis, R S and Amari, S and Clayton, R N}, abstractNote = {Presolar silicon carbide grains form in a variety of types of stars, including asymptotic giant branch red

Isotopic compositions of different presolar silicon carbide size

isotopic analysis of Sr, Zr, Mo, and Ba has been achieved by laser ablation and resonance ionization mass spectrometry (RIMS) (Nicolussi et al., 1997, 1998a,b,c; Pellin et al., 1999,2000). In contrast, isotopic analyses on nanodiamonds, which are too

Effects of CuO, Cr O and Fe O Doping on Phase Formation, Microstructure and Electric Properties of (Ba Ca )(Ti Zr

(Ba 0.85 Ca 0.15)(Ti 0.90 Zr 0.10)O 3 (BCTZ) solid solution is one of the lead-free piezoelectric materials with a perovskite structure, which has received considerable attention. This is mainly due to their high piezoelectric coefficient (d 33≥442 pC/N) around

Zirconium and Molybdenum in Individual Circumstellar

1998/9/1The data for Zr revealed the largest isotopic anomalies, with 96 Zr/ 94 Zr ratios ranging from 0.074 times to 10 times the solar value. The isotopic data on Mo show one population of graphite grains with close-to-terrestrial Mo composition in all isotopes and five grains with an s-process nucleosynthesis signature, i.e., correlated depletions in the p- and r-process isotopes.

Trace

Boron isotopic compositions of tourmalines range from − 14.0 to − 2.2‰ and fall within the δ 11 B range of this mineral in granite-related settings. Tourmaline rosettes from the Asarcık granitoid show relatively lighter δ 11 B values ( − 14.0 to − 12.2‰) in comparison

Extreme Zr stable isotope fractionation during magmatic

Once the Zr concentration in each sample was known, solutions were spiked with our in-house 91 Zr-96 Zr isotopic tracer in optimal proportions (i.e., 0.43:0.57 spike-to-sample Zr mass ratio). Spiked aliquots were fluxed at 140C on a hotplate overnight and dried down twice to a salt and redigested to ensure complete spike-sample equilibration, which is vital for obtaining accurate isotopic

CHARACTERISTICS OF CHLORINE ISOTOPES IN SALT LAKES

The isotopic compositions of chiorine in the brine, oil-field water and saline mineral derived from drilling in the Kunteyi salt lakes have been determined by positive thermal ionization mass spectromeny, based on the measarement of Cs2Cl+ ion.The Ta filaments

Chemical and boron isotopic compositions of tourmaline

2021/2/22Boron isotopic compositions The boron isotopic compositions obtained by LA-MC-ICP-MS are given in ESM Table S2. Disseminated tourmaline in the Longxianggai granite has δ 11 B values of −15.1 to −11.2‰ with an average of −13.6‰ 2.0 ‰ (n=20, 2σ15).

Nucleosynthetic Isotope Variations of Siderophile and

Because of their distinctive isotopic characteristics, the stellar origin of the low density (LD) graphite and high density (HD) graphite is thought to be different from each other. The 12 C/ 13 C ratios of HD graphite grains range from 2 to 4000 with bimodal peaks around 12 C/ 13 C = 10 and 300–400 ( Fig. 9 ).

Evaluating Spatiotemporal Resolution of Trace Element

There is no significant difference in any of the TE concentrations or Pb isotopic compositions between honey from the brood nest and honey from the super in regions of high‐density urban land use. At the same time, we found some variation (the honey super was slightly less concentrated) between the brood nest and super boxes for Pb, Ti, Mo, and Sb in residential/suburban regions.

PARTITIONING OF U, Zr AND FP BETWEEN MOLTEN OXIDIC AND METALLIC CORIUM

The surface position of the molten steel layer follows from comparison of its density, which does not exceed 7.0 g/cm3, and oxidic U-Zr melt density, which in accordance with experimental data [8], if 3. It is clear that this reasoning applies only if the mentioned

GEMOC

One sample of phlogopite-bearing dunite displays clinopyroxene with very large anomalies in Rb, Ba, Nb, Ta, Zr, Hf, Pb, Sr and Ti which is characteristic of an interaction with a carbonatitic melt. The _D value of -86 to -70 versus SMOW for mica and amphibole of both types of Kerguelen xenoliths and of the phlogopite megacrysts are very homogeneous and within the common mantle range.

GRSHG *G %D X 2 VXSHUFRQGXFWRUWDSHV

of Ba, Zr and Cu compositions on the lift factor in critical current at 30K, 2.5T can be observed in figure 4. The lift factor is found to increase approximately linearly with (Ba + Zr)/Cu compositional ratio in the films. Except in one case, it is seen that a (Ba

The molybdenum isotopic composition of the modern ocean

(Zr), which interferes 92Mo, 94Mo, and 96Mo, or using a double-spike made up of 97Mo and 100Mo (and the dou-ble spike approach assumes mass-dependent fractionation). We have developed a new analytical method for de-termining the isotopic composition

Physical Properties of Porous Pure and Zr/Sn

2017/6/11The experimental densities of the porous BaTiO 3 and Ba(Ti 0.96 Sn x Zr 0.04-x)O 3 (x = 0.02−0.04) ceramics prepared by High Energy Mechanochemical (HEM) method and conventional sintering vary from 93.6% to 89.0%of theoretical density.

Richardson, SH et al. (1982): Rb, Sr, Sm and Nd

These isotopic correlations are equally consistent with mixing of depleted and enriched end member melts or partial melting of an inhomogeneous, variably enriched mantle source. However, observed Zr-Ba-Nb-Y interelement relationships are inconsistent with any simple two-component model of magma mixing, as might result from the rise of a lower mantle plume through the upper mantle.

Composition

In this work, (Ba 1−x Sr x)Zr 0.1 Ti 0.9 O 3 (BSZTx, x = 0, 0.15, 0.25 and 0.35) thin films were successfully deposited on La 0.7 Sr 0.3 MnO 3 (LSMO)-coated (001) SrTiO 3 (STO) single crystal substrates using laser molecular beam epitaxy. The BSZTx thin films with compositions of x = 0 and 0.15 display an inverse electrocaloric effect (ECE) with a maximum adiabatic temperature change of

Zr and Ba Isotopic Compositions of High

2012/9/1We report measurements of Zr and Ba isotopes by RIMS on high-density graphite grains from Orgueil. The light- and heavy-element isotopic data available for these grains will be compared to results of nucleosynthesis models of various stellar sources.

Trace

Boron isotopic compositions of tourmalines range from − 14.0 to − 2.2‰ and fall within the δ 11 B range of this mineral in granite-related settings. Tourmaline rosettes from the Asarcık granitoid show relatively lighter δ 11 B values ( − 14.0 to − 12.2‰) in comparison

Synthesis and Characterisation of Ceramic Proton Conducting

3, Ba(OH) 2 and Ce 0:75Zr 0:25O 2 after exposing to humid air for 24 h at 200 oC and soaking in boiling water for 3 h [29]. 10 mol % Zr-doped BaCe 0.7Zr 0.1Y 0.2O 3-δ formed BaCO 3 under CO 2 as seen through a weight gain of 7.7 % in TGA [30]. Also, theo

Geochemical and Sr

Large charnockite plutons (∼970 Ma) were intruded into high-grade metamorphic rocks of the Mawson Coast area, east Antarctica, immediately after peak granulite metamorphism in the region. Detailed Sr-Nd isotopic studies suggest that charnockites in the central zone have significantly higher initial Sr/Sr ratios (0.7205-0.7334), lower initial ∈ values (-8.8 to -11.1) and older Nd depleted

ZIRCONIUM—HAFNIUM ISOTOPE EVIDENCE FROM

2013/10/24We present new Zr and Hf isotope data for CAIs including high-precision Zr isotope compositions for carbonaceous chondrites and a terrestrial sample that were previously analyzed for Hf isotopes. The Zr data shows clearly resolved excesses in the neutron-rich, stable isotope, 96 Zr, while the new Hf data for all but two CAIs reveal depletions in r-process isotopes.

STELLAR NUCLEOSYNTHESIS AND THE ISOTOPIC

Grains whose isotopically anomalous compositions indicate a stellar origin include diamond, silicon carbide, graphite, corundum, and silicon nitride. Most silicon carbide and corundum come from red giant and asymptotic giant branch stars (low-mass stars at the end of their evolution), and carry the isotopic signatures of H burning in the core and later of H and He burning in thin shells.

Ferroelectric Relaxor Behavior and Spectroscopic Properties

2012/2/4In the present compositions (Na 0.5 Bi 0.5) 1-x Ba x Zr y Ti 1-y O 3, Na, Ba and Bi ions occupy the A-site of the ABO 3 perovskite type structure and Zr and Ti ions occupy the B-site. As known Ti and Zr are ferroelectrically active and these cations are off-centered in the octahedral site gives rise to a local dipolar moment.

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