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Crystallogenesis and Mineralogy
Saint Petersburg, Russia
30 September-4 October 2007
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Conferences & Meetings 2nd International Conference "Crystallogenesis and Mineralogy"
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Limiting melt supercoolings at crystallogenesis of elementary and complex substances

RMS-DPI code:  2007-1-12-0
Scientific session:  Session 1. Fundamental problems of crystallogenesis
Author listing:  Kidyarov B.I.
Principal author:  Kidyarov Boris Ivanovich
Language:  Russian
Abstract - Summary 
(short description):
The Turnbulls criterion of homogeneous nucleation = ΔTm/Tm is plotted on figures with co-ordinates - Tm (Fig.1), and - Tb/Tm (Fig.2) for the set of elementary and complex substances, having various crystalline structures (1-9). The set of points is restricted from above by lines 1-3, and from below - by line 4, which form a convex quadrangle, divided by internal lines 5 - 8 into four sub-regions, which contain: A low boiled elements (gases), B low melting organic and inorganic substances, average melted, and refractory substances with high value , and sub-region D average melted, and refractory substances with low and average value , Fig.1. The metal crystals, which arranged on line 8 and many crystals below her, have centrosymmetric cubic structure, O-point group, and ones, which are upper line 8, have noncentrosymmetric, or centrosymmetric structure of potential ferroelastic state. Line 9 is a median of sub-regions B, D. The values increase due to Tm/Tb growth, (Fig.2). So, = F(Tm), = F(Tb/Tm) are not simple functions, but ones are fuzzy, subdefiniteness functions.
 
RMS-DPI code:  2007-1-12-0
Proceeedings volume 
in the RMS catalogue:
 
Crystallogenesis and Mineralogy
Pages:  20-22
File of proceedings 
(PDF): 
 345 K
Status:  printed
Accepted:  14/05/2007
Published on-line:  22/12/2007
Permanent address of publication:  http://www.minsoc.ru/2007-1-12-0/
Contact author(s):  Kidyarov, Boris Ivanovich
 

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