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.
@article{arxiv.0811.4353,
title = {A new triclinic modification of the pyrochlore-type KOs2O6 superconductor},
author = {S. Katrych and Q. F. Gu and Z. Bukowski and N. D. Zhigadlo and G. Krauss and J. Karpinski},
journal= {arXiv preprint arXiv:0811.4353},
year = {2010}
}
Comments
23 pages, 9 figures,6 tables. Accepted for J. Solid State Chem