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1988•Inorg. Mater. (Engl. Transl.); (United States)Requires access

Phase equilibria in the Sm-As-S system

P.G. Rustamov, T.M. Il'yasov, Asif Mamedov

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Abstract

The Sm-As-S ternary system was investigated by the methods of physicochemical analysis, and a projection of the liquidus surface was constructed. The congruently melting compound SmAs/sub 4/S/sub 7/, and also the compounds SmAs/sub 2/S/sub 4/, Sm/sub 3/As/sub 4/S/sub 9/, and SmAsS/sub 3/ formed by peritectic reactions were detected in the system. The boundary of the glass-formation region was defined. The liquidus of the system consists of 12 primary phase crystallization fields. (The field of the sulfur is degenerate.) The crystallization fields of SmAs and As/sub 4/S/sub 4/ were partly defined, while the field of elemental sulfur was indicated tentatively. There are regions of phase separation in the system.

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What this paper is about

The Sm-As-S ternary system was investigated by the methods of physicochemical analysis, and a projection of the liquidus surface was constructed. The congruently melting compound SmAs/sub 4/S/sub 7/, and also the compounds SmAs/sub 2/S/sub 4/, Sm/sub 3/As/sub 4/S/sub 9/, and SmAsS/sub 3/ formed by peritectic reactions were detected in the system. The boundary of the glass-formation region was defined. The liquidus of the system consists of 12 primary phase crystallization fields. (The field of the sulfur is degenerate.) The crystallization fields of SmAs and As/sub 4/S/sub 4/ were partly defined, while the field of elemental sulfur was indicated tentatively. There are regions of phase separation in the system.

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Available abstract

The Sm-As-S ternary system was investigated by the methods of physicochemical analysis, and a projection of the liquidus surface was constructed. The congruently melting compound SmAs/sub 4/S/sub 7/, and also the compounds SmAs/sub 2/S/sub 4/, Sm/sub 3/As/sub 4/S/sub 9/, and SmAsS/sub 3/ formed by peritectic reactions were detected in the system. The boundary of the glass-formation region was defined. The liquidus of the system consists of 12 primary phase crystallization fields. (The field of the sulfur is degenerate.) The crystallization fields of SmAs and As/sub 4/S/sub 4/ were partly defined, while the field of elemental sulfur was indicated tentatively. There are regions of phase separation in the system.

Key concepts: Liquidus, Crystallization, Phase (matter), Ternary numeral system, Phase diagram, Sulfur, Projection (relational algebra), Field (mathematics)

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