Research output: Contribution to journal › Article › peer-review
High compressibility of synthetic analogous of binary iridium–ruthenium and ternary iridium–osmium–ruthenium minerals. / Yusenko, Kirill V.; Martynova, Svetlana A.; Khandarkhaeva, Saiana et al.
In: Materialia, Vol. 14, 100920, 12.2020.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - High compressibility of synthetic analogous of binary iridium–ruthenium and ternary iridium–osmium–ruthenium minerals
AU - Yusenko, Kirill V.
AU - Martynova, Svetlana A.
AU - Khandarkhaeva, Saiana
AU - Fedotenko, Timofey
AU - Glazyrin, Konstantin
AU - Koemets, Egor
AU - Bykov, Maxim
AU - Hanfland, Michael
AU - Siemensmeyer, Konrad
AU - Smekhova, Alevtina
AU - Gromilov, Sergey A.
AU - Dubrovinsky, Leonid S.
N1 - Funding Information: The authors thank the I11 beamline at the DIAMOND LS, UK; the ID11, BM01A, and ID15B beamlines at the European Synchrotron Radiation Facility, Grenoble, France, for providing us with measurement time and technical support. Study has been partially carried on the P02.1 beamline at the PETRA III synchrotron facility at DESY (Hamburg), a member of the Helmholtz Association (HGF). A.S. acknowledges personal funding from CALIPSOplus project (the Grant Agreement 730872 from the EU Framework Programme for Research and Innovation HORIZON 2020). Publisher Copyright: © 2020 Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/12
Y1 - 2020/12
N2 - Hcp–Ir0.24Ru0.36Os0.40 and fcc–Ir0.84Ru0.06Os0.10 ternary alloys as well as binary hcp–Ir0.33Ru0.67 and fcc–Ir0.75Ru0.25 ones were prepared using thermal decomposition of [IrxRu1-x(NH3)5Cl][OsyIr(1-y)Сl6] single-source precursors in hydrogen flow below 1070 K. These single-phase alloys correspond to ternary and binary peritectic phase diagrams and can be used as synthetic models for rare iridosmine minerals. Thermal decomposition of parent bimetallic precursor [Ir(NH3)5Cl][OsСl6] has been investigated using in situ powder X-ray diffraction in inert and reductive atmospheres. In reductive atmosphere, [Ir(NH3)5Cl][OsСl6] forms (NH4)2[OsСl6] as crystalline intermediate; Ir from its cationic part is reduced by hydrogen with a formation of defect fcc-structured metallic particles; the final product is a metastable hcp–Ir0.5Os0.5 alloy. In inert atmosphere, the salt decomposes at higher temperature without a formation of any detectable crystalline intermediates; two-phase fcc+hcp mixture forms directly above 800 K. Room temperature compressibility up to 50 GPa has been studied for all prepared alloys in diamond anvil cells. Investigated ternary and binary alloys do not show any phase transitions upon compression at room temperature. In contrast with other investigated ultra-incompressible refractory alloys with osmium and iridium, hcp–Ir0.33Ru0.67, fcc–Ir0.75Ru0.25 binary and fcc–Ir0.84Ru0.06Os0.10 ternary alloys show higher compressibility in comparison with pure metals. Fcc–Ir0.75Ru0.25 alloy shows several magnetic phase transitions (at approx. 3.4 K, 135 K and 233 K) that could be related to different magnetic phases.
AB - Hcp–Ir0.24Ru0.36Os0.40 and fcc–Ir0.84Ru0.06Os0.10 ternary alloys as well as binary hcp–Ir0.33Ru0.67 and fcc–Ir0.75Ru0.25 ones were prepared using thermal decomposition of [IrxRu1-x(NH3)5Cl][OsyIr(1-y)Сl6] single-source precursors in hydrogen flow below 1070 K. These single-phase alloys correspond to ternary and binary peritectic phase diagrams and can be used as synthetic models for rare iridosmine minerals. Thermal decomposition of parent bimetallic precursor [Ir(NH3)5Cl][OsСl6] has been investigated using in situ powder X-ray diffraction in inert and reductive atmospheres. In reductive atmosphere, [Ir(NH3)5Cl][OsСl6] forms (NH4)2[OsСl6] as crystalline intermediate; Ir from its cationic part is reduced by hydrogen with a formation of defect fcc-structured metallic particles; the final product is a metastable hcp–Ir0.5Os0.5 alloy. In inert atmosphere, the salt decomposes at higher temperature without a formation of any detectable crystalline intermediates; two-phase fcc+hcp mixture forms directly above 800 K. Room temperature compressibility up to 50 GPa has been studied for all prepared alloys in diamond anvil cells. Investigated ternary and binary alloys do not show any phase transitions upon compression at room temperature. In contrast with other investigated ultra-incompressible refractory alloys with osmium and iridium, hcp–Ir0.33Ru0.67, fcc–Ir0.75Ru0.25 binary and fcc–Ir0.84Ru0.06Os0.10 ternary alloys show higher compressibility in comparison with pure metals. Fcc–Ir0.75Ru0.25 alloy shows several magnetic phase transitions (at approx. 3.4 K, 135 K and 233 K) that could be related to different magnetic phases.
KW - High-pressure high-temperature
KW - Iridosmine
KW - Refractory alloys
KW - Single-source precursors
KW - RU
KW - STABILITY
KW - SOLID-SOLUTIONS
KW - X-RAY-DIFFRACTION
KW - THERMAL-DECOMPOSITION
KW - ELECTROCATALYTIC ACTIVITY
KW - IR-OS ALLOYS
KW - MAGNETIC-PROPERTIES
KW - ABSOLUTE-ZERO
KW - EXTREME CONDITIONS
UR - http://www.scopus.com/inward/record.url?scp=85092391993&partnerID=8YFLogxK
U2 - 10.1016/j.mtla.2020.100920
DO - 10.1016/j.mtla.2020.100920
M3 - Article
AN - SCOPUS:85092391993
VL - 14
JO - Materialia
JF - Materialia
SN - 2589-1529
M1 - 100920
ER -
ID: 25627393