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Metallic Solids

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....

Bonding in Metals

Bonding in Metals

Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”.

Alkali Metals

Alkali Metals

Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
Table 1: Properties of the alkali metals

Metal-Ligand Bonds

Metal-Ligand Bonds

The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...

Properties of Transition Metals

Properties of Transition Metals

Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.

Types of Chemical Bonds

Types of Chemical Bonds

Chemical bonding theories were pioneered by American chemist Gilbert N. Lewis. He developed a model called the Lewis model to explain the type and formation of different bonds. Chemical bonding is central to chemistry; it explains how atoms or ions bond together to form molecules. It explains why some bonds are strong and others are weak, or why one carbon bonds with two oxygens and not three; why water is H2O and not H4O.

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Updated: Jan 29, 2026

Resource Recycling of Red Soil to Synthesize Fe2O3/FAU-type Zeolite Composite Material for Heavy Metal Removal

Resource Recycling of Red Soil to Synthesize Fe2O3/FAU-type Zeolite Composite Material for Heavy Metal Removal

Published on: June 2, 2022

Zeolite-Type Metal Oxalate Frameworks.

Fei-Yan Yi^1,2, Huajun Yang², Xiang Zhao³

¹School of Materials Science & Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China.

Angewandte Chemie (International Ed. in English)

|February 5, 2019

Summary

This summary is machine-generated.

Researchers demonstrate that linear ligands can successfully synthesize zeolite structures, including the challenging RHO topology. This finding expands the possibilities for creating novel zeolite materials with desirable features like large cages.

Keywords:

RHO topology linear linkers oxalates template effects zeolitic frameworks

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Organic Structure-directing Agent-free Synthesis for *BEA-type Zeolite Membrane

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Published on: February 22, 2020

Area of Science:

Materials Science
Inorganic Chemistry
Crystallography

Background:

Zeolite frameworks are typically synthesized using ligands with bent coordination geometry.
Linear ligands are generally considered unsuitable for constructing zeolite topologies due to geometric constraints.
Few metal oxalates are known to form zeolite-type structures.

Purpose of the Study:

To investigate the feasibility of using linear ligands for zeolite synthesis.
To report a new family of indium oxalate salts with diverse zeolite topologies.
To explore the synthesis of zeolite RHO with specific structural features.

Main Methods:

Hydrothermal synthesis of indium oxalate salts.
X-ray diffraction for crystal structure determination.
Analysis of coordination geometry and framework topology.

Main Results:

A series of indium oxalate salts were successfully synthesized.
Multiple zeolite topologies, including RHO, GIS, and ABW, were identified.
A novel zeolite RHO net featuring double 8-rings and large alpha cages was obtained.

Conclusions:

Linear ligands can be effectively employed in the synthesis of zeolite frameworks.
The reported indium oxalates represent a significant advancement in zeolite construction.
The synthesized zeolite RHO offers promising characteristics for potential applications.