Hydrothermal Synthesis, Crystal Structure, and Magnetism of Na2[Ir(OH)6] and its Dehydration to Na2IrO3
Albrecht R, Poddig H, Hunger J, Ruck M, Benrath P, Moeller A, Doert T (2021)
Publication Type: Journal article
Publication year: 2021
Journal
Book Volume: 647
Pages Range: 667-672
Journal Issue: 6
DOI: 10.1002/zaac.202000454
Abstract
Yellow single-crystals of Na2[Ir(OH)6] were obtained by hydrothermal synthesis in 20 m sodium hydroxide solution at 473 K within 5 hours. X-ray diffraction on a single-crystal revealed the trigonal space group (Formula presented.) (no. 148) with lattice parameters a=582.76(3) pm and c=1399.30(8) pm at 100(1) K. Na2[Ir(OH)6] crystallizes in a hettotype of Mg(OH)2 (brucite) and is isostructural to Na2[Sn(OH)6]. The oxygen atoms are arranged in a hexagonal close packing, Na+ and Ir4+ ions occupy the octahedral voids in every second layer in an ordered manner, the voids of the next layers remain empty. The hydroxidometalate layer can be seen as isolated [Ir(OH)6]2− octahedra, which are embedded in a honeycomb net of alkali metal cations. Temperature-dependent magnetic measurements revealed paramagnetic behavior with an effective moment of 1.9 μB per iridium ion. The thermal decomposition of Na2[Ir(OH)6] in air starts at about 220 °C and results in pure Na2IrO3.
Involved external institutions
How to cite
APA:
Albrecht, R., Poddig, H., Hunger, J., Ruck, M., Benrath, P., Moeller, A., & Doert, T. (2021). Hydrothermal Synthesis, Crystal Structure, and Magnetism of Na2[Ir(OH)6] and its Dehydration to Na2IrO3. Zeitschrift für Anorganische und Allgemeine Chemie, 647(6), 667-672. https://doi.org/10.1002/zaac.202000454
MLA:
Albrecht, Ralf, et al. "Hydrothermal Synthesis, Crystal Structure, and Magnetism of Na2[Ir(OH)6] and its Dehydration to Na2IrO3." Zeitschrift für Anorganische und Allgemeine Chemie 647.6 (2021): 667-672.
BibTeX: Download
Germany (DE)