Structure of La5Mo32O54 containing trans bicapped Mo8 octahedral clusters and tricluster Mo7–Mo10–Mo7 chain fragments

Synthesis, Structural Studies, and Physical Properties of the RE5Mo32O54 (RE=La, Ce, Pr, Nd) Compounds Containing trans-Bicapped Mo8 Octahedral Clusters and Mo7–Mo10–Mo7 Triclusters

“…All RE Mo O compounds are isostructural with La Mo O that was brie#y described in 1993 by Gall et al (16). Comparison of the unit-cell volumes of the four compounds shows that they decrease regularly from the lanthanum to the neodymium compound as expected from the lanthanide contraction for RE> cations.…”

“…The "rst one results from a three-dimensional edge-sharing of Mo octahedra and was found in the atypical compound Pr Mo O (15). The second one is built up from one Mo and two Mo clusters interconnected through short Mo}Mo bonds of about 2.77 A s and was observed in coexistence with bicapped octahedral Mo clusters in La Mo O (16). The tricluster Mo }Mo }Mo thus formed also constitutes the repeat unit of the in"nite chain found in the quaternary M M Mo O (M"Sr, Eu; M"Al, Fe, Ga) compounds (17,18).…”

Electrical and Magnetic Properties of Strontium Substituted Lanthanum Manganate Perovskite Crystals Prepared Using Fused Salt Electrolysis

“…(1) Normal products which grew on the cathode plate or spiral. They were generally small in yield and were either La rich (La,Sr)Mo O crystals or a phase whose X-ray di!raction pattern appears to be related to that of La Mo O (42). (2) A product, which is found above the melt on the cathode shank, which we will refer to as the cathode creep or shank product.…”

Sr4Ga3Mo26O48 Containing Mo7 Clusters and Infinite Mo7–Mo10–Mo7 Chains

“…Recently, two novel clusters, namely the Mo8 cluster and the tricluster Mo24 chain fragment, were obtained in the two series of compounds RMo8OI4 (R = La, Ce, Pr, Nd and Sm) (Leligny, Ledesert, Labbe, Raveau & McCarroll, 1990;Leligny et al, 1993;Gougeon & McCarley, 1991;Kerihuel & Gougeon, 1995a,b) and R5Mo32054 (R = La, Ce, Pr and Nd) (Gall, Toupet & Gougeon, 1993), respectively. The former cluster is based on an octahedral Mo6 cluster, two faces of which are capped by two additional Mo atoms.…”