Rubidium dicalcium triniobate(V), RbCa(2)Nb(3)O(10), has been synthesized by solid-state reaction and its crystal structure refined from X-ray powder diffraction data using Rietveld analysis. The compound is a three-layer perovskite Dion-Jacobson phase with the perovskite-like slabs derived by termination of the three-dimensional CaNbO(3) perovskite structure along the ab plane. The rubidium ions (4/mmm symmetry) are located in the inter-stitial space.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2969613 | PMC |
| http://dx.doi.org/10.1107/S1600536809018157 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
The characterization of clay minerals in the Kashafrud Formation in a gas field in northeast Iran.
Sci Rep
March 2025
School of Mining, College of Engineering, University of Tehran, Tehran, Iran.
This study focuses on the identification of type, abundance, and distribution patterns of the clay minerals within the Kashafrud Formation, a Middle Jurassic sedimentary rock sequence in the Khangiran gas field, Kopet-Dagh Basin, northeast Iran. This investigation shed light on the identification of type, abundance, and distribution patterns of the clay minerals obtained from 10 representative core samples by employing laboratory techniques, such as powder X-ray diffraction, polarizing light microscopy, and scanning electron microscopy. Results from the XRD analysis revealed quartz as the dominant mineral (49-65%), accompanied by the clay minerals (illite 8-18%, kaolinite 2-6%, chlorite 3-11%), alkali feldspar (7-16%), and plagioclase (3-10%), with occasional presence of ankerite (2-7%) or pyrite (1-3%).
View Article and Find Full Text PDFDevelopment of moringa seed powder-modified slag geopolymers for enhanced mechanical properties and effective dye removal.
Sci Rep
March 2025
Chemistry Department, Faculty of Women for Arts, Science and Education, Ain Shams University, Cairo, 11757, Egypt.
Crystal violet (CV), a widely used dye in paints and textiles, poses a significant environmental threat due to its non-biodegradable nature. A modified slag-based geopolymer has been developed to address this issue by incorporating raw moringa seed powder (MSP), an agricultural waste. The geopolymers (SM1, SM2, and SM3) were created by adding different percentages of MSP (0.
View Article and Find Full Text PDFEnhanced in vivo performance of topical ocular acetazolamide nanocrystals: A novel approach for glaucoma treatment.
Int J Pharm
March 2025
Unidad de Investigación y Desarrollo en Tecnología Farmacéutica (UNITEFA). CONICET and Departamento de Ciencias Farmacéuticas. Facultad de Ciencias Químicas. Universidad Nacional de Córdoba. Ciudad Universitaria, Córdoba 5000. Argentina. Electronic address:
High intraocular pressure (IOP) is the main risk factor for glaucoma progression. Acetazolamide (AZM) presents a potent IOP-lowering effect but is only administered orally due to its low aqueous solubility and ocular permeability. This study aimed to develop AZM nanocrystals (AZM-NC) as an alternative for its topical ocular delivery.
View Article and Find Full Text PDFMechanochemical Activation of MnO: Implications for Lithium Intercalation.
Inorg Chem
March 2025
Inorganic Solid-State Chemistry, Saarland University, Campus, Building C4.1, 66123 Saarbrücken, Germany.
Manganese oxide (MnO) was subjected to mechanochemical activation (MCA) using a planetary ball mill to investigate the influence of milling parameters on lithium intercalation. After activation, MnO was lithiated in suspension with organolithium compounds. Structural changes, including LiMnO formation, were analyzed by powder X-ray diffraction (PXRD) with Rietveld refinement, supported by scanning electron microscope (SEM), transmission electron microscopy (TEM), physisorption isotherms, and inductively coupled plasma mass spectrometry (ICP-MS).
View Article and Find Full Text PDFDevelopment and characterisation of polymeric solid dispersed systems of hesperidin, obtained by centrifugal fibre formation.
Heliyon
February 2025
Kyiv National University of Technologies and Design, 2 Mala Shyianovska Str., Kyiv, 01011, Ukraine.
The flavonoid hesperidin is a crucial, biologically active substance of great interest because of its polypharmacological properties and high safety profile. However, its widespread use of this bioflavonoid in remedies for the treatment and prevention of various diseases is limited by its low water solubility. This study reports on solid dispersed systems (SDSs) of hesperidin, fabricated for the first time via the method of centrifugal fibre.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!