Seismological models from Apollo missions provided the first records of the Moon inner structure with a decrease in seismic wave velocities at the core–mantle boundary1–3. The resolution of these records prevents a strict detection of a putative l
On the basis of this result and empirical mixing rules for Fe-O solutions, we argue that Fe-light element solid solutions at inner core conditions may be significantly nonideal. We derive expressions for the properties of nonideal multicomponent solutions that are valid in the limit of small ...
Introduction Core Composition, Phase Diagram, and Crystal Structure of Iron Composition of the Core Phase Diagram of Iron Alloy Crystal Structure of Iron Solidification of the Inner Core Grain Size and Rheology in the Inner Core Origin of the Inner-Core Elastic Anisotropy An Overview Anisotropy of ...
Although the vp of the two-phase mixture is not accurate enough to constrain the light element content in the core due to a lack of suitable wave velocity data for Fe–Ni–Si alloys under high pressure and temperature conditions, the averaged vp for the two-phase mixture at 330 GPa and...
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Core-loss spectroscopy is usually used to provide elemental information. The variations in the energy-loss near-edge structure of the element of interest can also be investigated. Transmission EELS is even capable of measuring the sample thickness based on t/λ = ln(It/I0), where t is the ...
[1] The nature of light element(s) in the core holds key to our understanding of Earth's history of accretion and differentiation, but the core composition remains poorly constrained. Carbon has been proposed to be a major constituent of the inner core, with broad implications for the global...
additional impurity element in the outer core (note that O is not soluble into the inner core and thus does not alter the possible range of the inner core composition considered here) andTICB = 6000 K, the outer core liquid may include 1.7–4.4 wt% O53along with 3.5 wt% Si and ...
Earth’s inner core (IC) is less dense than pure iron, indicating the existence of light elements within it1. Silicon, sulfur, carbon, oxygen and hydrogen have been suggested to be the candidates2,3, and the properties of iron–light-element alloys have been studied to constrain the IC c...
1. A golf ball, comprising: i) an inner core layer comprising a foamed composition, the inner core layer having a diameter in the range of about 0.100 to about 1.100 inches, a specific gravity (SGinner), and an outer surface hardness (Hinner core surface) and a center hardness (Hinner...