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The system KPO3-Y(PO3)3

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Abstract

The previously unknown binary system KPO3-Y(PO3)3 has been examined by thermal, X-ray and microscopic analysis and its phase diagram provided. The existence of the compound KY(PO3)4 has been confirmed. Its melting point (700°, incongruent) and basic parameters of the unit cell (monoclinic system, space group P21/n, lattice parameters: a=7.36, b=8.36, c=14.39 Å, β=96.1°) have been determined. The new, so far unknown, compound has been discovered and assigned the formula K2Y(PO3)5. It has been found that it forms peritectoidally (in the solid phase) at 642°.

Zusammenfassung

Das zuvor unbekannte binäre System KPO3-Y(PO3)3 wurde mittels Thermo-, Röntgendiffraktions- und mikroskopischer Analyse untersucht und das Phasendiagramm aufgestellt. Die Existenz der Verbindung KY(PO3)4 wurde dabei bekräftigt. Ihr Schmelzpunkt (700°, inkongruent) und die grundlegenden Parameter der Elementarzellen (monoklines System, Raumgruppe P21/n, Gitterkonstanten: a=7.36, b=8.36, c=14.39 Å, β=96.1°) wurden ermittelt. Weiterhin wurde eine neue, bislang unbekannte Verbindung mit der Formel K2Y(PO3)5 entdeckt. Sie verfügt (in fester Phase) über ein Peritektikum bei 642°.

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Authors and Affiliations

  1. Department of Inorganic Chemistry, Faculty of Engineering and Economics, Academy of Economics, 53345, Wroclaw, Poland

    G. Czupińska & T. Znamierowska

Authors
  1. G. Czupińska
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  2. T. Znamierowska
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Additional information

This paper was included in the CPBP-01.18 problem and was financially supported by the Ministry of National Education.

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Czupińska, G., Znamierowska, T. The system KPO3-Y(PO3)3 . Journal of Thermal Analysis 36, 639–643 (1990). https://doi.org/10.1007/BF01914516

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  • DOI: https://doi.org/10.1007/BF01914516

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