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Related Concept Videos

Network Covalent Solids02:18

Network Covalent Solids

Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
Molecular and Ionic Solids02:54

Molecular and Ionic Solids

Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
Structures of Solids02:22

Structures of Solids

Solids in which the atoms, ions, or molecules are arranged in a definite repeating pattern are known as crystalline solids. Metals and ionic compounds typically form ordered, crystalline solids. A crystalline solid has a precise melting temperature because each atom or molecule of the same type is held in place with the same forces or energy. Amorphous solids or non-crystalline solids (or, sometimes, glasses) which lack an ordered internal structure and are randomly arranged. Substances that...
Metallic Solids02:37

Metallic Solids

Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

Crystal Field Theory - Tetrahedral and Square Planar Complexes

Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...

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Synthesis and Characterization of Functionalized Metal-organic Frameworks
11:27

Synthesis and Characterization of Functionalized Metal-organic Frameworks

Published on: September 5, 2014

Ba5Cl4(H2O)8(VPO5)8: a novel three-dimensional framework solid.

Ai-Yun Zhang1, Juan Zheng, Qiu-Fen Wang

  • 1Department of Physics and Chemistry, Henan Polytechnic University, Jiaozuo 454000, People's Republic of China. zay@hpu.edu.cn

Acta Crystallographica. Section C, Crystal Structure Communications
|March 6, 2010
PubMed
Summary
This summary is machine-generated.

A new barium compound, pentabarium tetrachloride octahydrate octakis(oxovanadium phosphate), was synthesized using hydrothermal methods. Its unique layered structure features oxovanadium phosphate anions and barium chloride hydrate clusters, forming a novel three-dimensional framework.

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Synthesis and Characterization of Functionalized Metal-organic Frameworks
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Area of Science:

  • Inorganic Chemistry
  • Crystal Engineering
  • Materials Science

Background:

  • Hydrothermal synthesis is a key method for creating novel inorganic compounds.
  • Understanding crystal structures is crucial for predicting material properties.

Purpose of the Study:

  • To synthesize and characterize a new barium-based inorganic compound.
  • To elucidate the crystal structure and bonding of the novel compound.
  • To explore the structural features of oxovanadium phosphate materials.

Main Methods:

  • Hydrothermal synthesis was employed for compound preparation.
  • Single-crystal X-ray diffraction was used to determine the crystal structure.
  • Analysis of crystallographic data, including space group and atomic positions.

Main Results:

  • The novel compound Ba(5)Cl(4)(H(2)O)(8)(VPO(5))(8) was successfully synthesized.
  • The crystal structure was determined to be orthorhombic (space group Cmca).
  • The structure consists of alternating anionic oxovanadium phosphate layers and cationic barium chloride hydrate clusters.

Conclusions:

  • The synthesized compound exhibits a unique three-dimensional structure built from distinct layers.
  • The Ba-O bonds play a critical role in connecting these layers.
  • This discovery expands the known family of oxovanadium phosphate materials and their structural diversity.