Also found in: Encyclopedia, Wikipedia.


 (sfîr′yə-līt′, -ə-līt′, sfĕr′-)
A small, usually spheroidal body consisting of radiating crystals, found in obsidian and other glassy lava rocks.

spher′u·lit′ic (-lĭt′ĭk) adj.


(Minerals) any of several spherical masses of radiating needle-like crystals of one or more minerals occurring in rocks such as obsidian
spherulitic adj


(ˈsfɛr yʊˌlaɪt, ˈsfɪər-)

a rounded aggregate of radiating crystals found in obsidian and other glassy igneous rocks.
Mentioned in ?
References in periodicals archive ?
This increase in spherulite dimensions is accompanied by an increase in the intensity of light (Fig.
The crystalline structure of cristobalite is octahedral or sometimes occurs as spherulite. The mineral is colorless or sometimes white and exhibits properties similar to that of quartz.
This strategy was also used in the present study, and the morphology was interpreted in terms of(mass and volumetric) degree of crystallinity and amorphous fraction, long period, lamellar thickness and thickness of the amorphous layer, contribution of the different X-ray diffraction peaks, spherulite size and size distribution, and the cross-sectional ("skin-core") layer structure.
In fact, the formation of large spherulite structures during center spin-coating strongly suggests that the TCB molecule crystallization is formed along a preferential direction which corresponds to the solution spreading/drying direction in which the centrifugal forces are applied.
The micro-fibrous texture of the calcite crystals in the spherulite was enhanced after etching (compare to Fig.
Miles, "AFM study of in situ real time polymer crystallization and spherulite structure," Probe Microscopy, vol.
The spherulite of PLLA and PLLA/TTAD was observed using an XPN-203E polarization optical microscope equipped with a camera and a programmable temperature controller.
simulated the morphology of crystals including spherulite and shish kebab of polystyrene using the phase field method [20].
POM showed that the spherulite number of PLLA increased and the spherulite size significantly reduced in the presence of NA.
The composition dependence of spherulite growth rate, crystallinity, lamella thickness, 3HV content in the crystalline phase, and the melting temperature changed discontinuously at ca.
Each of those samples presents different average spherulite radii, which can influence the opacity.
For [beta]-1 sample, the value of n = 2.6, indicating a heterogeneous nucleation followed by diffusion-controlled spherulite growth.