irregular crystal

irregular crystal

[i′reg·yə·lər ′krist·əl]
(meteorology)
A snow particle, sometimes covered by a coating of rime, composed of small crystals randomly grown together; generally, component crystals are so small that the crystalline form of the particle can be seen only through a magnifying glass or microscope.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The main crystals are stellar crystal, column, irregular crystal, small graupel, and plate.
8A-C); 5) the absence of fabrics that are characteristic of neomorphic calcite ("all transformations between one mineral and itself or polymorph"; Folk, 1965), such as irregular crystal sizes, wavy or curved inter-crystalline boundaries, and floating relics in the interior of the crystals.
Summary: TEHRAN (FNA)- Results of new studies showed that shoals of fish and swarms of krill hang out in groups that take on the same overall shape, which is not a simple sphere, a cylinder, or ovoid, but something more akin to an irregular crystal.
However, their presence does cause a more irregular morphology, as these particles perturb the crystallization of the solvent and change the patterns of crystal growth, forming more irregular crystals in the solvent.
Regular shape particles were formed from solutions of low dielectric constant such as ethanol and THF and irregular crystals were formed from a solvent with a higher dielectric constant such as water.
Strains isolated from Braulio Carrillo, Tortuguero and Cahuita, presented predominantly irregular crystals. On the other hand, more than 60% of the isolates from Terraba-Sierpe and Hitoy-Cerere had medium oval crystals.
Also, some strains presented small and large bipyramidal as well as irregular crystals (Fig.