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Allotropes of silicon are structurally varied forms of silicon . Amorphous silicon takes the form of a brown powder. [1] Crystalline silicon has a metallic luster and a grayish color. Single crystals can be grown with the Czochralski process. Crystalline silicon can be doped with elements such as boron, gallium, germanium, phosphorus or arsenic.
Allotropes Some elements exist in several different structural forms, called allotropes. Each allotrope has different physical properties. For more information on the Visual Elements image see the Uses and properties section below.
17 de nov. de 2014 · A new orthorhombic allotrope of silicon, Si24, is demonstrated using a two-step synthesis. Its structure contains open channels and it possesses a quasidirect bandgap near 1.3 eV.
- Duck Young Kim, Stevce Stefanoski, Oleksandr O. Kurakevych, Timothy A. Strobel
- 2015
1 de nov. de 2014 · When purified, it takes on a diamond structure, which is essential to modern electronic devices--carbon is to biology as silicon is to technology. A team of Carnegie scientists led by Timothy Strobel has synthesized an entirely new form of silicon, one that promises even greater future applications.
Carbon's ability to form strong multiple bonds enables it to form a host of molecular and network covalent allotropes. Some of these allotropes have been known since ancient times; some are a focus of much active research. The major classes of allotropes include: 1. \(\alpha\)- and \(\beta\)-Graphite.
