منابع مشابه
NaMgF3: A low-pressure analog of MgSiO3
[1] Using first principles computations we show that NaMgF3 perovskite undergoes the same series of phase transitions as MgSiO3 perovskite, that is, the postperovskite transition and the dissociation into CsCl-type NaF and cotunnite-type MgF2. These fluorides also undergo the same series of phase transitions as MgO and SiO2, the dissociation products of MgSiO3. Since the phase transformations i...
متن کاملStability of the MgSiO3 analog NaMgF3 and its implication for mantle structure in super-Earths
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. [1] First‐principles calculations on MgSiO 3 suggested a breakdown into MgO + SiO 2 at pressure above 1000 GPa with...
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Phenylketonuria (PKU) is one of the most prevalent types of hereditary metabolic disorders which is caused due to an absence or reduction of the activity of the Phenylalanine hydroxylase enzyme in the liver which in turn, inhibits the transformation of phenylalanine (Phe) to tyrosine. In clinical terms, this disorder is displayed with severe, permanent and irreversible mental retardation. This ...
متن کاملFirst principles study of thermodynamics and phase transition in low-pressure (P21/c) and high-pressure (C2/c) clinoenstatite MgSiO3
[1] Using first principles quasi-harmonic theory, we have investigated the vibrational and thermodynamic properties of P21/c and C2/c MgSiO3 clinoenstatites. Very good agreement between experimentally measured thermodynamic properties, such as equation of state, and those predicted by the local density approximation (LDA) functional has been found. The level of agreement found in these chain si...
متن کاملLow-temperature and low atmospheric pressure infrared reflectance spectroscopy of Mars soil analog materials
Infrared reflectance spectra of carefully selected Mars soil analog materials have been measured under low atmospheric pressures and temperatures. Chemically altered montmorillonites containing ferrihydrite and hydrated ferric sulfate complexes are examined, as well as synthetic ferrihydrite and a palagonitic soil from Haleakala, Maui. Reflectance spectra of these analog materials exhibit subtl...
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ژورنال
عنوان ژورنال: Geophysical Research Letters
سال: 2006
ISSN: 0094-8276
DOI: 10.1029/2006gl026348