Third Quasicrystal Found

By Paul J. Steinhardt et al. – http://www.nature.com/srep/2015/150313/srep09111/full/srep09111.html, CC BY 4.0, https://commons.wikimedia.org/w/index.php?curid=40522020

Quasicrystals1,2, short for quasiperiodic crystals, are solids able to violate the conventional rules of crystallography because their structure is “quasiperiodic” rather than periodic; that is, their atomic density can be described by a finite sum of periodic functions with periods whose ratio is irrational. Their diffraction pattern consists of true Bragg peaks whose positions can be expressed as integer linear combinations of D integer linearly independent wavevectors where D is greater than the number of space dimensions. Among the quasicrystals made in the laboratory, many exhibit a crystallographically forbidden, three-dimensional icosahedral symmetry defined by D = 6 integer linearly independent wavevectors. See: Collisions in outer space produced an icosahedral phase in the Khatyrka meteorite never observed previously in the laboratory

Bindi, L. et al. Collisions in outer space produced an icosahedral phase in the Khatyrka meteorite never observed previously in the laboratory. Sci. Rep. 6, 38117; doi: 10.1038/srep38117 (2016).

***

See Also:

This entry was posted in Uncategorized and tagged . Bookmark the permalink.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s