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Synthesis, Crystal Structure, and Compressibilities of Mn3-x Ir5 B2+x (0?x?0.5) and Mn2 IrB2.

ABSTRACT: The new ternary transition metal borides Mn3-x Ir5 B2+x (0?x?0.5) and Mn2 IrB2 were synthesized from the elements under high temperature and high-pressure/high-temperature conditions. Both phases can be synthesized as powder samples in a radio-frequency furnace in argon atmosphere. High-pressure/high-temperature conditions were used to grow single-crystals. The phases represent the first ternary compounds within the system Mn-Ir-B. Mn3-x Ir5 B2+x (0?x?0.5) crystallizes in the Ti3 Co5 B2 structure type (P4/mbm; no. 127) with parameters a=9.332(1), c=2.896(2)?Å, and Z=2. Mn2 IrB2 crystallizes in the ?-Cr2 IrB2 crystal structure type (Cmcm; no. 63) with parameters a=3.135(3), b=9.859(5), c=13.220(3)?Å, and Z=8. The compositions of both compounds were confirmed by EDX measurements and the compressibility was determined experimentally for Mn3-x Ir5 B2+x and by DFT calculations for Mn2 IrB2 .

SUBMITTER: Petermuller B 

PROVIDER: S-EPMC6175196 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature

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Synthesis, Crystal Structure, and Compressibilities of Mn<sub>3-x</sub> Ir<sub>5</sub> B<sub>2+x</sub> (0≤x≤0.5) and Mn<sub>2</sub> IrB<sub>2</sub>.

Petermüller Benedikt B   Neun Christopher C   Stekiel Michal M   Zimmer Dominik D   Tribus Martina M   Wurst Klaus K   Winkler Björn B   Huppertz Hubert H  

Chemistry (Weinheim an der Bergstrasse, Germany) 20180920 55

The new ternary transition metal borides Mn<sub>3-x</sub> Ir<sub>5</sub> B<sub>2+x</sub> (0≤x≤0.5) and Mn<sub>2</sub> IrB<sub>2</sub> were synthesized from the elements under high temperature and high-pressure/high-temperature conditions. Both phases can be synthesized as powder samples in a radio-frequency furnace in argon atmosphere. High-pressure/high-temperature conditions were used to grow single-crystals. The phases represent the first ternary compounds within the system Mn-Ir-B. Mn<sub>3-  ...[more]

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