“Amorphous carbonia”的意思、由来-开放百科全书

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Amorphous carbonia

释义

Notes
References
External links

Amorphous carbonia, also called a-carbonia or a-CO₂, is an exotic amorphous solid form of carbon dioxide that is analogous to amorphous silica glass. It was first made in the laboratory in 2006 by subjecting dry ice to high pressures (40-48 gigapascal, or 400,000 to 480,000 atmospheres), in a diamond anvil cell.^[1] Amorphous carbonia is not stable at ordinary pressures—it quickly reverts to normal CO₂.^[2]

While normally carbon dioxide forms molecular crystals, where individual molecules are bound by Van der Waals forces, in amorphous carbonia a covalently bound three-dimensional network of atoms is formed, in a structure analogous to silicon dioxide or germanium dioxide glass.

Mixtures of a-carbonia and a-silica may be a prospective very hard and stiff glass material stable at room temperature. Such glass may serve as protective coatings, e.g. in microelectronics.

The discovery has implications for astrophysics, as interiors of massive planets may contain amorphous solid carbon dioxide.

Notes

1. ^{{cite book|title=Philosophy Of Mathematics|author=Francis, J.|date=2008|publisher=Global Vision Publishing House|isbn=9788182202672|url=https://books.google.com/books?id=6UGGgTXUJCEC|page=198|accessdate=11 December 2014}}
2. ^[https://www.newscientist.com/article/dn9339-carbon-dioxide-glass-created-in-the-lab.html Carbon dioxide glass created in the lab] 15 June 2006, www.newscientisttech.com. Retrieved 31 October 2009.

References

{{cite journal | author = Paul F. McMillan | title = Solid-state chemistry: A glass of carbon dioxide | journal = Nature | volume = 441 | issue = 7095 | pages = 823 | doi = 10.1038/441823a | date = 2006 | pmid = 16778880|bibcode = 2006Natur.441..823M }}
{{cite journal | author = Mario Santoro | author2 = Federico A. Gorelli | author3 = Roberto Bini| author4 = Giancarlo Ruocco | author5 = Sandro Scandolo| author6 = Wilson A. Crichton | title = Amorphous silica-like carbon dioxide | journal = Nature | volume = 441 | pages = 857–60 | date = 2006 | type = letter | doi = 10.1038/nature04879 | pmid = 16778885 | issue = 7095|bibcode = 2006Natur.441..857S }}

External links

Dry ice creates toughened glass
Physicsweb: Dry ice forms ultrahard glass

5 : Carbon dioxide|Amorphous solids|Physical chemistry|Astrophysics|Glass compositions

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