I have a two generations of vesuvianite from one locality. In both cases samples represented by wiluite (B-vesuvianite) with later H2O-bearing vesuvianite crusts. In one case the crusts is transparent and has symmetry P4/n and in another case the crust are creviced and has symmetry P4/nnc. The estimated temperaure as wel as chemical composition in both vesuvianite crusts the same. I consider, that the creviced crusts has a higher symmetry due to higher speed of crystallization, but how to evaluate this speed? Which technique or method can be applied?
Hi, Panikorovskii ,
Mabe some in-situ process analysis technologies(PATs), such as FBRM, PVM, and imaging system, are helpful. FYI, two papers are as follow,
[1] S. Kutluay, O. Sahin, A.A. Ceyhan, M.S. Izgi, Design and optimization of production parameters for boric acid crystals with the crystallization process in an MSMPR crystallizer using FBRM (R) and PVM (R) technologies, Journal of Crystal Growth, 467 (2017) 172-180.
[2] P. Dandekar, Z.B. Kuvadia, M.F. Doherty, Engineering crystal morphology, Ann Rev Mater Res, 43 (2013) 359-386.
Best,
Zhang
Generally, the slower the crystallization rate then the larger the crystal or grain size produced. I'd be looking at imaging or perhaps the Scherrer equation to get a handle on crystal form and size. This may be helpful: Article Crystal size distribution (CSD) in rocks and the kinetics an...
I do not know exactly how, but what I know is that it depends on how stable the ideal conditions of formation of a certain mineral are. In the El Teniente mine, I could appreciate how in a year, large crystals of copper oxides were formed, surrounding a steel nail. Each crystal measured about 10 to 12 cm.
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