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- W2005179431 abstract "Die ternären Iridiumboride SEIr2B2 mit den leichteren Seltenerdmetallen SE ≡ Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy wurden dargestellt und röntgenographisch untersucht. LaIr2B2, SmIr2B2 und Gdlr2B2 sind Hochtemperaturphasen. Alle Verbindungen kristallisieren orthorhombisch in der Raumgruppe Fddd mit 8 Formeleinheiten in der Elementarzelle. Für LaIr2B2 betragen die Gitterkonstanten a = 10,643(1) Å; b = 9,420(1) Å; c = 6,065(1) Å (weitere Werte in Tabelle 1). Strukturbestimmungen an Einkristallen von CeIr2B2, EuIr2B2, GdIr2B2 und YIr2B2 ergaben, daβ der CaRh2B2-Typ vorliegt. Die übrigen Verbindungen sind nach Pulveraufnahmen isotyp. Der Verlauf der Elementarzellenvolumina zeigt, daβ Europium zweiwertig und Cer dreiwertig vorliegen. The ternary iridium borides REIr2B2 containing the light rare earth metals RE ≡ Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy were prepared and investigated by means of X-ray methods. LaIr2B2, SmIr2B2 and GdIr2B2 are high temperature phases. All the compounds crystallize in the orthorhombic space group Fddd with 8 formula units in the unit cell. The lattice constants for LaIr2B2 are a = 10.643(1) Å; b = 9.420(1) Å; c = 6.065(1) Å (for the other compounds see Table 1). Structure determination using single crystals of CeIr2B2, EuIr2B2, GdIr2B2 and YIr2B2 showed that they had the CaRh2B2 structure. Judging from powder photographs the other compounds are similar. A plot of the unit cell volumes vs. the lanthanide atomic number shows that europium is divalent and cerium is trivalent in these compounds." @default.
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- W2005179431 date "1991-08-01" @default.
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- W2005179431 title "Ternäre Seltenerd-Iridiumboride SEIr2B2 (SE ≡ Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy) mit CaRh2B2-Struktur" @default.
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- W2005179431 doi "https://doi.org/10.1016/0022-5088(91)90269-a" @default.
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