Phasendiagramme von Chalkogeniden und Pnictiden des Rutheniums und Osmiums mit Pyrit‐, Markasit‐, Löllingit‐ und Arsenopyritstruktur

Abstract

Die Phasendiagramme von Pnictid‐Chalkogenid‐Systemen des Rutheniums und Osmiums wurden mit Hilfe von Röntgenguinier‐Aufnahmen abgeschreckter Präparate untersucht. In den Systemen RuPSRuPSe, OsPSOsPSe, RuPSOsPS und RuPSeOsPSe (Randphasen Arsenopyrittyp) werden lückenlose Mischkristallreihen gebildet. In den Systemen RuP2RuPSRuS2, RuP2RuPSeRuSe2, RuP2RuTe2 und OsP2OsTe2 (Randphasen Löllingit‐, Arsenopyrit‐ und Pyrit‐ bzw. Markasittyp) konnte keine Mischkristallbildung beobachtet werden, wohingegen im analogen System RuSb2−2xTe3x eine lückenlose Mischkristallreihe (x < 0,25: Löllingit‐, x = 0,25–0,65: Arsenopyrit‐, x > 0,65: Markasit‐ und x = 1: Markasit‐ oder Pyritstruktur) mit einem kontinuierlichen Verlauf der Gitterkonstanten gebildet wird. Als bisher unbekannte ternäre Verbindungen wurden OsPTe (Arsenopyrittyp, a = 622,91(4), b = 616,04(4), c = 624,49(4) pm und β = 112,01(1)°) sowie RuPTe (Strukturtyp unbekannt) erhalten. Die FIR‐Spektren dieser Verbindungen sowie die der RuSb2RuTe2‐Mischkristalle werden mitgeteilt und diskutiert.

Noncentrosymmetric Tetrel Pnictides RuSi4P4 and IrSi3P3: Nonlinear Optical Materials with Outstanding Laser Damage Threshold

“…Specifically, the Ru‐Si bond distances of 2.34–2.36 Å in RuSi 4 P 4 are similar in length to distances in Ru 2 Si 3 (2.32–2.52 Å), [ 40 ] TiRuSi (2.37–2.50 Å), [ 41 ] and not as short as the previously reported Ru–Si in RuSi 4 P 4 (2.25–2.32 Å). [ 29 ] However, the Ru–P distances ranging from 2.40–2.44 Å seem slightly longer than most Ru‐P distances, but are comparable to distances found in LaRu 4 P 12 (2.36 Å), [ 42 ] RuPSe (2.45 Å), [ 43 ] RuP 3 (2.28–2.41 Å), [ 44 ] α‐RuP 4 (2.28–2.44 Å), [ 45 ] and β‐RuP 4 (2.41–2.64 Å). [ 46 ]…”

Chemistry and Physical Properties of the Phosphide Telluride Zr2PTe2

“…Two of them consist of isolated phosphide and telluride anions: the uranium phosphide telluride UPTe [6,7] and the recently found compound Ti 2 PTe 2 . [8] Four other phosphorus-and tellurium-containing compounds are known: the three telluro-phosphides IrPTe, [9] OsPTe [10] and RuPTe, [10] consisting of M 3+ cations besides [P-Te] 3-dumbbells, and the compound BaP 4 Te 2 [11] built from Ba 2+ cations and 1 ϱ [P 4 Te 2 ] 2-anions. Remarkably, no binary phosphorus and tellurium compounds are known, which additionally reflects the low affinity of the two elements as well as kinetic restraints.…”

The Tellurophosphate K4P8Te4: Phase-Change Properties, Exfoliation, Photoluminescence in Solution and Nanospheres

“…The far-infrared spectrum displays absorption peaks at 262(w), 306(s), 322(m), 417(m), 431(s), and 469(m) cm -1 . The peaks at 417 and 431 cm -1 can be assigned to P-Te by analogy to MPTe (M ) Ru, Os), 7 and those at 323 and 469 cm -1 to a P-P vibration in comparison to Ba 3 P 14 . 47 To probe the local structure of both the crystalline and glassy K 4 P 8 Te 4 , we performed atomic pair distribution function (PDF) analysis.…”

“…The paucity of P−Te bonds is in striking contrast to the well-established metal chalcophosphate class − involving the ternary (M/P/Q) and quaternary (A/M/P/Q) compounds with [P x Q y ] z − anions. The only reported P/Te containing inorganic compounds are MPTe (M = Ru, Os, Ir) and BaP 4 Te 2 . The latter features P−Te bonding, while only unit cell dimensions and spectroscopic data have been reported for the former.…”