## Wikipedia - Diamante (it) Wikipedia - Metastabiliteetti (fi) Wikipedia - Product (chemistry) (en) Wikipedia - Produk (kimia) (id) diamond

https://doi.org/10.1351/goldbook.D01671
An allotropic form of the element @[email protected] with cubic structure (space group $$O_{h}^{7}- Fd3m$$) which is thermodynamically @[email protected] at pressures above $$6\ \text{GPa}$$ at room temperature and @[email protected] at atmospheric pressure. At low pressures diamond converts rapidly to @[email protected] at temperatures above $$1900\ \text{K}$$ in an @[email protected] atmosphere. The chemical bonding between the carbon atoms is covalent with $$\mathrm{sp}^{3}$$ @[email protected]
Note:
There is also a hexagonal diamond-like structure of the element carbon (lonsdaleite).
Source:
PAC, 1995, 67, 473. (Recommended terminology for the description of carbon as a solid (IUPAC Recommendations 1995)) on page 487 [Terms] [Paper]