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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Probing Three Distinct Crystal Polymorphs of Melt-Crystallized Polyamide 6 by an Integrated Fast Sca
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Phonon Properties of Bulk Violet Phosphorus Single Crystals: Temperature and Pressure Evolution
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The Role of Redox on Bridgmanite Crystal Chemistry and Calcium Speciation in the Lower Mantle
Abstract not provided
Crystal structure of human PLD1 provides insight into activation by PI(4,5)P2 and RhoA
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Highly stable inverted methylammonium lead tri-iodide perovskite solar cells achieved by surface re-crystallization
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Targeted crystal growth of uranium gallophosphates via the systematic exploration of the UF 4 –GaPO 4 –ACl (A = Cs, Rb) phase space
The flux synthesis of a uranium gallophosphate and a uranium gallate, Cs 4 [UO 2 Ga 2 (PO 4 ) 4 ] and Cs 2 UO 2 Ga 2 O 5 , and 4 uranium phosphates, [Rb 2 Rb 3.93 Cl 0.93 ][(UO 2 ) 5 (PO 4 ) 5 ], Rb 11 [(UO 2 ) 8 (PO 4 ) 9 ], Rb 7.6 [(UO 2 ) 8 O 8.6 F 0.4 (PO 4 ) 2 ], and Rb 6 [(UO 2 ) 5 O 2 (PO 4 ) 4 ], is reported.
The role of pre-nucleation clusters in the crystallization of gold nanoparticles
Abstract not provided
Synthesis, crystal chemistry, and optical properties of two methylammonium silver halides: CH 3 NH 3 AgBr 2 and CH 3 NH 3 Ag 2 I 3
The ternary silver halides CH 3 NH 3 AgBr 2 and CH 3 NH 3 Ag 2 I 3 are low-dimensional, wide band gap semiconductors made up of edge-sharing silver halide tetrahedra.
Synthesis, crystal structure, and properties of stoichiometric hard tungsten tetraboride, WB 4
Hard stoichiometric WB 4 is synthesized under high-pressure and high-temperature conditions.
Prediction of crystal structures and motifs in the Fe–Mg–O system at Earth’s core pressures
Abstract Fe, Mg, and O are among the most abundant elements in terrestrial planets. While the behavior of the Fe–O, Mg–O, and Fe–Mg binary systems under pressure have been investigated, there are still very few studies of the Fe–Mg–O ternary system at relevant Earth’s core and super-Earth’s mantle pressures. Here, we use the adaptive genetic algorithm (AGA) to study ternary Fe x Mg y O z phases in a wide range of stoichiometries at 200 GPa and 350 GPa. We discovered three dynamically stable phases with stoichiometries FeMg 2 O 4 , Fe 2 MgO 4, and FeMg 3 O 4 with lower enthalpy than any known combination of Fe–Mg–O high-pressure compounds at 350 GPa. With the discovery of these phases, we construct the Fe–Mg–O ternary convex hull. We further clarify the composition- and pressure-dependence of structural motifs with the analysis of the AGA-found stable and metastable structures. Analysis of binary and ternary stable phases suggest that O, Mg, or both could stabilize a BCC iron alloy at inner core pressures.