Expanding the Rich Crystal Chemistry of Ruthenium(V) Oxides via the Discovery of BaRu₂O₆, Ba₅Ru₄O₁₅, Ba₂Ru₃O₁₀, and Sr₂Ru₃O₉(OH) by pH-Controlled Hydrothermal Synthesis

Abstract

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Honeycomb layered oxides: structure, energy storage, transport, topology and relevant insights

“…Although not delved in the scope of this review, honeycomb layered oxides entailing alkaline-metal atoms as the resident cations such as SrRu 2 O 6 and BaRu 2 O 6 can be prepared via a low-temperature hydrothermal synthesis route. 135,155,156 Finally, despite the scarce exploration of electrochemical ion-exchange [157][158][159][160][161][162][163][164][165][166] of honeycomb layered oxide materials, invaluable results on the K + /Na + ion-exchange process in Na 3 Ni 2 SbO 6 has been recently reported, demonstrating this process as a promising route to pursue. 167…”

Magnetic and electronic ordering phenomena in the [Ru$_2$O$_6$] honeycomb lattice compound AgRuO$_3$

“…[12]). The latter has been investigated intensively -experimentally and theoretically -in the last years [4,[14][15][16][17][18][19][20][21][22][23] and was shown to have the transition to a Néel AFM groundstate at ≈ 560 K. Moreover, in 2019 also BaRu 2 O 6 was synthesized which appears to have a related crystal structure [24].…”

Stacking Faults and Short‐Range Magnetic Correlations in Single Crystal Y5Ru2O12: A Structure with Ru+4.5 One‐Dimensional Chains

“…In particular, ruthenium displays an exceptionally rich range of unusual magnetic and transport properties [ 2,3 ] and can exist in several oxidation states, including Ru 3+ , Ru 4+ , Ru 5+ , and Ru 7+ , where Ru 4+ is the most common oxidation state. [ 4–10 ] For example, Sr 2 RuO 4 is a superconductor below T c = 0.93 K, [ 6 ] SrRu 2 O 6 is a high‐temperature antiferromagnet ( T N = 565 K), [ 11 ] SrRuO 3 is a ferromagnet below T C = 163 K, [ 12 ] and La 4 Ru 6 O 19 [ 13 ] is a non‐Fermi liquid.…”

“…[ 35 ] In addition, a low temperature hydrothermal method (200 °C) has been used to synthesize powders of Ca 1.5 Ru 2 O 7 , SrRu 2 O 6 , and Ba 2 Ru 3 O 9 (OH). [ 8,9 ]…”