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KLa(SO4)2–SrSO4 System at Temperatures above 600°C

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Inorganic Materials Aims and scope

Abstract—

The KLa(SO4)2–SrSO4 system has been studied at temperatures above 600°C by X-ray diffraction and thermogravimetric analysis. The results demonstrate that the system contains a broad range (0–70 mol % KLa(SO4)2) of solid solutions based on the orthorhombic phase β-SrSO4 (sp. gr. Pnma). We have determined the unit-cell parameters of the solid solutions. Their unit-cell volume has been shown to increase systematically from 307.67(6) to 313.54(21) Å3 in the composition range studied. The solid solutions result from heterovalent substitution of potassium and lanthanum ions for two strontium ions and decompose above a temperature of 950°C to form the SO3 and La2O3 oxides and potassium and strontium sulfates.

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Authors and Affiliations

  1. Mendeleev University of Chemical Technology, 125047, Moscow, Russia

    N. N. Bushuev, A. N. Egorova & I. I. Plotko

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  1. N. N. Bushuev
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  2. A. N. Egorova
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  3. I. I. Plotko
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Correspondence to N. N. Bushuev.

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Translated by O. Tsarev

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Bushuev, N.N., Egorova, A.N. & Plotko, I.I. KLa(SO4)2–SrSO4 System at Temperatures above 600°C. Inorg Mater 58, 1162–1167 (2022). https://doi.org/10.1134/S0020168522100053

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