Tyvanchuk Y. Phase equilibria and crystal structure of compounds in the {Y,Gd,Yb,Lu}-{Si,Ge}-In systems

Українська версія

Thesis for the degree of Candidate of Sciences (CSc)

State registration number

0499U002875

Applicant for

Specialization

  • 02.00.01 - Неорганічна хімія

21-10-1999

Specialized Academic Board

Д 35.051.10

Ivan Franko National University of Lviv

Essay

The dissertation is devoted to the investigations of phase equilibria in the {Y,Gd,Yb,Lu}-{Si,Ge}-In ternary systems. Isothermal sections at 870 K for all systems have been built. Only Yb-Ge-In system has been investigated at 670 K in the range 0-0,50 at. parts of Yb. The existence of 16 ternary compounds has been established. The crystal structures of 12 compounds have been determined by means of X-ray monocrystal and powder methods. Which belong to Mo2FeB2, CrB structure types and are superstructures to Ho11Ge10 structure type. Key words: phase equilibria, crystal structure, rare-earths, silicon, germaniun, indiun.

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