Instability of Alexander-McTague crystals and its implication for nucleation.

Investigation of Different Stages of Aluminum Fluoride Crystal Growth

Crystallization of Aluminum fluoride at atmospheric pressure has been considered. Structure, size and shape of crystals formed during the crystallization process have been investigated. By applying the direct analysis method for the existed aluminum in solution, the aluminum fluoride nucleation process has been detected as a concentration valley at the outset of crystallization process. The...

Crystal size distribution analysis of plagioclase in Neogene-Quaternary olivine basaltic lava flows in Dehaj-Javazm area, northwest of Shahre-Babak, Kerman

1. Introduction The rather limited Neogene-Quaternary olivine basaltic lava flows are outcropped in the Dehaj-Javazm area, north of Share-Babak, in the NW of Dehaj-Sarduieh magmatic belt as a part of the Urumieh-Dokhtar magmatic assemblage (UDMA). The rocks contain significant amounts of plagioclase both as phenocrysts and microliths in the microlithic groundmass which play an important role i...

Effect of impurities on the optical properties of KTP single crystals grown from flux

In the present work, KTP crystals have been grown by spontaneous nucleation technique in flux medium using K6P4O13 flux. 0.4-1 °C/h cooling rates were applied in the spontaneous nucleation process. The presence and amount of impurities has been determined by using XRF. The optical transmission spectra of impure KTP crystals in the UV–visible region are discussed. The transmission cut-off is cle...

EFFECT OFMASS TRANSPORT STABILITYAND UNDERCOOLING ON NUCLEATION OF ZNS CRYSTALS IN CLOSED AMPOULE CVT

Simulating nanoindentation and predicting dislocation nucleation using interatomic potential finite element method

Dislocation nucleation is central to our understanding of the onset of plasticity during nanoindentation. The shear stress in small volumes beneath the nanoindenter can achieve the theoretical limit of a perfect crystal. The ensuing nonlinear elastic instability can trigger homogenous dislocation nucleation inside the crystal. Here we employ the interatomic potential finite element method to si...