PrMo8O14, a Fourth Crystalline Form of the Series RMo8O14 (R = La, Ce, Pr, Nd, Sm)

Abstract

The crystal structure of PrMosO~4 contains a mixture of cis-edge-sharing and trans bi-face-capped octahedral Mo8 clusters in the ratio 2

Electronic Structure, Electrical and Magnetic Properties of RMo8O14 Compounds (R = La, Ce, Pr, Nd, Sm) Containing Bicapped Mo8 Clusters

“…Subsequently, the existence of monocapped Mo 7 clusters was well established in the M 4 M‘ 3 Mo 26 O 48 (M = Sr, Eu; M‘ = Al, Fe, Ga) compounds 11a. Bicapped Mo 8 clusters were reported in the series of polymorphic compounds RMo 8 O 14 (R = La, Ce, Pr, Nd, Sm), synthesized by solid-state reaction. − In some of the latter compounds, an isomeric form of the Mo 8 cluster, with the capping MoO 3 groups positioned on opposite faces with respect to the center of the octahedron, is observed (Figure b). One can then distinguish these two Mo 8 units as cis and trans isomers.…”

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

“…4 with their oxygen environment. While the bicapped Mo cluster, having here the trans con"guration, has previously been observed in the polymorphic compounds REMo O [La (25}27), Ce (28), Pr (29), Nd (30), Sm (31)], the isolated Mo cluster is unprecedented. It results from the interconnection of one bioctahedral Mo cluster with two monocapped octahedral Mo clusters in a manner similar to that The RE> ions are located in the anionic layers at the levels y+0.0 and y+0.5.…”

Thermoelectric properties of molybdenum oxides LnMo8O14 (Ln = La, Ce, Pr, Nd and Sm)

“…Molybdenum oxides with the formula LnMo 8 O 14 (Ln = La, Ce, Pr, Nd and Sm) [16,17,[29][30][31][32] were reported to contain Mo 8 clusters. LaMo 8 O 14 and CeMo 8 O 14 crystallize in the orthorhombic crystal system with the space group Pbcn as determined by the single crystal X-ray diffraction, although there is another different modification obtained from fused-salt electrolysis for LaMo 8 O 14 [16].…”