Growth of Crystals from Random Close Packing

Synthesis and characterization of C2-symmetric bis(carboxamide) pincer ligands

“…Racemisation and isomerisation of the present group of pincer compounds is seemingly required to achieve efficient close packing in the crystalline solid state. The principles governing efficient close packing in crystals 70–72 evidently play a key role in determining the space group into which compounds 1a–1f crystallise. All the current pincer compounds (except 1c ) racemise during crystallization.…”

“…Racemisation and isomerisation of the present group of pincer compounds is seemingly required to achieve efficient close packing in the crystalline solid state. The principles governing efficient close packing in crystals [70][71][72] evidently play a key role in determining the space group into which a D 1 and D 2 are dihedral angles between the mean plane of the central pyridine ring and the mean plane of the pincer aryl group appended to the amide groups containing O1 and O2, respectively (see Fig. 4b).…”

Glassy Formability and Structural Variation of Zr<SUB>50&minus;<I>x</I></SUB>Cu<SUB>50</SUB>Al<I><SUB>x</SUB></I> (<I>x</I>=0&sim;25) Alloys with Respect to Icosahedral Short-Range Ordering

“…Frank 30) pointed out that icosahedral clusters may be present in a liquid and can stabilize the liquid structure. Indeed, structural models of liquids and metallic glasses, such as dense random packing models, 31,32) have been found to have many icosahedral clusters. 33) Furthermore, the icosahedral atomic structure of the glassy state correlates with the stability of supercooled liquid.…”

Chemical Microscopy

“…The anomalous behavior of some amino acids as nucleation agents for ice was discussed by Barthakur and Maybank (16), and a paper on carbon particles and ice nucleation was published by Garten and Head (100). Bernal, Knight, and Cherry (21) have investigated the growth of crystals by random close packing using, as a model, solid balls in a box with roughened interior walls. The box was a parallelogram the edges of which were hinged so that the shape of the box could be changed.…”