A new triclinic modification of the pyrochlore-type KOs2O6 superconductor

Abstract

A new modification of KOs2O6, the representative of a new structural type (Pearson symbol aP18, a=5.5668(1)A, b=6.4519(2)A, c=7.2356(2)A, space group P-1, no.2) was synthesized employing high pressure technique. Its structure was determined by single-crystal X-ray diffraction. The structure can be described as two OsO6 octahedral chains relating to each other through inversion and forming big voids with K atoms inside. Quantum chemical calculations were performed on the novel compound and structurally related cubic compound. High-pressure X-ray study showed that cubic KOs2O6 phase was stable up to 32.5(2) GPa at room temperature.

23 pages, 9 figures,6 tables. Accepted for J. Solid State Chem

References in corpus (12)

• New Pyrochlore Oxide Superconductor RbOs2O6
• New beta-Pyrochlore Oxide Superconductor CsOs2O6
• Crystal structure of the pyrochlore oxide superconductor KOs${}_2$O${}_6$
• Correlation Effects and Structural Dynamics in the $\beta$-Pyrochlore Superconductor KOs${}_2$O${}_6$
• Mass enhancement, correlations, and strong coupling superconductivity in the beta-pyrochlore KOs2O6
• Chemical trends of superconducting properties in pyrochlore oxides
• Crystal growth, structural studies and superconducting properties of beta-pyrochlore KOs2O6
• Second Anomaly in the Specific Heat of beta-Pyrochlore Oxide Superconductor KOs2O6
• Electronic structure properties and BCS superconductivity in beta-pyrochlore oxides: KOs_2O_6
• A second phase transition and superconductivity in the beta-pyrochlore oxide KOs2O6
• High Pressure Effects on Superconductivity in the beta-pyrochlore Oxides AOs2O6 (A=K, Rb, Cs)
• High pressure effects on the superconductivity of beta-pyrochlore oxides AOs2O6

Cited by in corpus (4)

• Growth of bulk single-crystal MnP helimagnet and its structural and NMR characterization
• Crystal growth, characterization and advanced study of the noncentrosymmetric superconductor Mo${}_3$Al${}_2$C
• High-pressure growth and characterization of bulk MnAs single crystals
• Superconducting and Structural Transitions in the β-Pyrochlore Oxide KOs2O6 under High Pressure