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Structural studies of hydrated rare earth nitrates within the stereoatomic model of crystal structures.
Acta Crystallogr B Struct Sci Cryst Eng Mater
February 2025
MIREA - Russian Technological University, 78 Vernadsky Avenue, Moscow, 119454, Russian Federation.
All crystal structures containing nitrate ions, water molecules and one of the rare earth (RE) metal atoms (La-Lu, Y, Sc) were extracted from the Inorganic Crystal Structure Database. The composition of the identified compounds is analyzed in terms of the number of coordinated and uncoordinated water molecules and nitrate ions. Among the resulting compounds, several isotypic and morphotropic series are observed.
View Article and Find Full Text PDFModulation of the modulated magnetic structure of an Ho i-MAX phase described by a magnetic (3+2)-dimensional superspace group.
Acta Crystallogr B Struct Sci Cryst Eng Mater
February 2025
Institute of Physics of the Czech Academy of Sciences, Na Slovance 1999/2, 18200 Praha 8, Czechia.
The magnetic structures of the Ho-based i-MAX phase (MoHo)GaC were studied with neutron powder diffraction at low temperature. (MoHo)GaC crystallizes in the orthorhombic space group Cmcm. The material undergoes two successive antiferromagnetic transitions at T = 10 K and T = 7.
View Article and Find Full Text PDFPhoto-induced chirality in a nonchiral crystal.
Science
January 2025
Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, Germany.
Chirality, a pervasive form of symmetry, is intimately connected to the physical properties of solids, as well as the chemical and biological activity of molecular systems. However, inducing chirality in a nonchiral material is challenging because this requires that all mirrors and all roto-inversions be simultaneously broken. Here, we show that chirality of either handedness can be induced in the nonchiral piezoelectric material boron phosphate (BPO) by irradiation with terahertz pulses.
View Article and Find Full Text PDFPractical application of CS-CG Stabilised soil in subgrade construction.
Environ Technol
January 2025
Jinan Licheng District Tongda municipal Engineering Department, Jinan, People's Republic of China.
To enhance the water stability and bearing capacity of the Shandong Ming Dong Expressway's soaked subgrade, carbide slag (CS) and coal gangue powder (CG) were used as stabilisers. Stabiliser dosages of 5%, 10%, and 15%, with the CS:CG ratios of 0:100, 30:70, 50:50, 70:30, and 100:0, were tested. The study evaluated the performance of CS-CG stabilised soil through unconfined compressive strength (UCS) tests at 7 and 28 days, six dry-wet cycles, a 30-day water immersion test, pH test, swell rate test, XRD, SEM, and MIP analyses.
View Article and Find Full Text PDFSuperhydrophobic and Self-Healing Porous Organic Macrocycle Crystals for Methane Purification under Humid Conditions.
J Am Chem Soc
January 2025
Stoddart Institute of Molecular Science, Department of Chemistry, Zhejiang University, Hangzhou 310058, P. R. China.
Purifying methane from natural gas using adsorbents not only requires the adsorbents to possess excellent separation performance but also to overcome additional daunting challenges such as humidity interference and durability requirements for sustainable use. Herein, porous organic crystals of a new macrocycle () with superhydrophobic and self-healing features are prepared and employed for the purification of methane (>99.99% purity) from ternary methane/ethane/propane mixtures under 97% relative humidity.
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