Structures of SrV6O11 and NaV6O11

Effect of Iron Substitution on the Structural, Electric, and Magnetic Properties inR-Type PbFexV6−xO11, a Frustrated System

“…The magnetic exchange interactions may vary from classical parallel spin alignments to disordered spin-glass systems. Correlations between magnetic and transport properties have been reported for AV O , A"Na, Sr, and reveal completely different phenomena depending on the nature of the A ion (6,9).…”

“…In PbV O , the Pb> 6s lone pair gives rise to the noncentrosymmetric P6 mc space group. This oxide is isostructural with the low temperature, 200 K, form of NaV O (6). In addition to the interesting behavior of V>-V> mixed-valence 3d electrons, which may be in an intermediate state between localized and itinerant as in the perovskite La \V Sr V VO or the spinel Zn \V Li V V O systems (7,8), the coupling of magnetic moments among ions within and between R blocks is of great interest.…”

Integrated-Optic Add/Drop Multiplexing of Free-Space Waves for Intra-Board Chip-to-Chip Optical Interconnects

“…The Na, V(1), V(2), V(3), O(1), O(2), and O(3) atoms are located at the Wyckoff sites 2c (1/3, 2/3, 1/4), 6g (1/2, 0, 0), 4e (0, 0, z), 2d (1/3, 2/3, 3/4), 12k (x, 2x, z), 6h (x, 2x, 3/4), and 4f (1/3, 2/3, z), respectively. The details of our structural refinement are presented in tables 1 and 2 5 .…”

“…The synthesis of opaque black single crystals of NaV 6 O 11 was described in [4] and [5]. A few of the crystals were finely ground in acetone for x-ray powder diffraction measurements.…”

“…At ambient conditions, the crystal structure of NaV 6 O 11 (P6 3 /mmc, Z = 2) [5] consists of hexagonal close-packed layers of O and Na atoms, and of three types of V atoms (figure 1). The V(1)O 6 octahedra form a regular Kagomé lattice perpendicular to [001] by edge sharing.…”