12.7: Types of Crystalline Solids- Molecular, Ionic, and Atomic
2018年5月20日 · There are four types of crystals: (1) ionic, (2) metallic, (3) covalent network, and (4) molecular. Properties and several examples of each type are listed in the following table and are described in the table below.
Molecular solid - Wikipedia
Some forms of sulfur and selenium are composed of S 8 (or Se 8) units and are molecular solids at ambient conditions, but converted into covalent allotropes having atomic chains extending throughout the crystal.
Molecular Crystal - an overview | ScienceDirect Topics
In a molecular crystal, the electron and hole associated with an excited state may reside on the same molecule (Frenkel exciton) or adjacent molecules (charge-transfer exciton).
Molecular crystal | crystallography | Britannica
Molecular crystals are substances that have relatively weak intermolecular binding, such as dry ice (solidified carbon dioxide), solid forms of the noble gases (e.g., argon, krypton, and xenon), and crystals of numerous organic compounds.
Two-dimensional inorganic molecular crystals - Nature
2019年10月17日 · Our findings can be extended to the controlled growth of other two-dimensional inorganic molecular crystals and open up opportunities for potential molecular electronic devices.
A Practical Guide to the Design of Molecular Crystals
2018年12月6日 · To begin with, it would be useful to summarize the key characteristics of the molecular crystal, as these are the major design considerations for any crystal synthesis.
Dynamic molecular crystals with switchable physical properties
2016年6月21日 · This molecular crystal exhibits significant thermochromic behaviour, where the colour changes from green (LT phase) to orange (HT phase), and is accompanied by an anisotropic change in the...
Crystal Engineering: From Molecule to Crystal | Journal of the …
2013年6月10日 · This Perspective provides a brief historical introduction to crystal engineering itself and an assessment of the importance and utility of the supramolecular synthon, which is one of the most important concepts in the practical use and implementation of crystal design.
Crystal - Molecular, Binding, Structure | Britannica
2024年11月23日 · Crystal - Molecular, Binding, Structure: The Dutch physicist Johannes D. van der Waals first proposed the force that binds molecular solids. Any two atoms or molecules have a force of attraction (F) that varies according to the inverse seventh power of the distance R between the centres of the atoms or molecules: F = −C/R7, where C is a constant.
tools for the design of molecular crystals that are easily accessible to experimental solid-state chemists.24 The reader should keep in mind that the scope of this review is limited to the design of crystals exclusively comprised of molecular entities (i.e., metal−organic crystals are excluded)
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