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The transformation of the crystal structure by isomorphous K +-Cs+ substitutions in the non-tetrahedral positions leading to the phase transition has been studied in the series of K 1-x Cs x BSi2O6 solid solutions. The samples have been crystallized from the glass at 850°C for 10 h. According to the data on the crystal structures refined by the Rietveld method, the compositions with 0 ≤ x ≤ 0.35 crystallize in space group -Rfis1-temp̄43d, structural type KBSi2O6, and those with 0.37 ≤ x ≤ 1.0, crystallize in Ī3d, structural type CsBSi 2O6. The reversible cubic-cubic phase transition Ī43d Ī3d occurs in the composition range x = 0.35-0.37.
Original language | Russian |
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Pages (from-to) | 572-578 |
Number of pages | 7 |
Journal | Glass Physics and Chemistry |
Volume | 37 |
Issue number | 5 |
DOIs | |
State | Published - Oct 2011 |
ID: 9152693