Apparent Scarcity of Low-Density Polymorphs of Inorganic Solids.
PHYS REV LETT
, Article 175503. 10.1103/PhysRevLett.104.175503.
For most inorganic solids, very few dense polymorphs and no low-density polymorphs are observed. Taking a wide range of tetrahedrally-coordinated binary solids (e.g., ZnO, GaN) as a prototypical system, we show that the apparent scarcity of low-density polymorphs is not due to significant structural or energetic limitations. Using databases of periodic networks as sources of novel crystal structures, followed by ab initio energy minimization, we predict a dense spectrum of low-density low-energy polymorphs. The diverse range of materials considered indicates that this is likely to be a general phenomenon.
|Title:||Apparent Scarcity of Low-Density Polymorphs of Inorganic Solids|
|Open access status:||An open access version is available from UCL Discovery|
|Additional information:||© 2010 The American Physical Society|
|Keywords:||PERIODIC TETRAHEDRAL FRAMEWORKS, AUGMENTED-WAVE METHOD, ZINC-OXIDE, ENUMERATION, PRESSURE|
|UCL classification:||UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Chemistry|
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