Journal of Physical Studies 9(2), 130–134 (2005) DOI: https://doi.org/10.30970/jps.09.130 THE STRUCTURE OF THE Cu3Si CHEMICAL COMPOUND IN MOLTEN STATE S. Mudry, I. Shtablavyi Ivan Franko National University of Lviv, Department for Physics of Metals 8 Kyrylo i Mefodii St., Lviv, UA–79005, Ukraine

The structure of liquid Cu$_{3}$Si chemical compound has been studied by means of X-ray diffraction method. This chemical compound can exist at ${η }”$, ${η }'$ and $η $-phase at different temperatures. It is interesting to study the relation between the structure of these crystalline phases and the atomic distribution in liquid state.

The analysis of the structure factors and binary correlation functions allowed us to conclude that the atomic distribution in liquid state is influenced by the chemical short order. A topology of the atomic arrangement is also similar to those of liquid copper rather than liquid silicon.

The diffraction patterns for crystalline phases have been also studied at two temperatures corresponding to ${η }”$ and $η $-phases. It was shown that structure of the $η $-phase is similar to a short range order in the molten Cu$_{3}$Si compound. Taking into account the obtained diffraction data the structure of Cu$_{3}$Si liquid compound can be considered as heterocoordinated distribution of Cu and Si atoms, whose topology is similar to the one of crystalline $η $-phase. X-ray diffraction studies at higher than melting point temperatures show a significant stability of chemically ordered atomic distribution.

PACS number(s): 61.25.-f

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