R. Lam
McMaster University
2 Papers
2 Citations
R. Lam is an academic researcher from McMaster University. The author has contributed to research in topics: Crystal structure & Antiferromagnetism. The author has an hindex of 1, co-authored 2 publications.
Chat about Author
Papers
Synthesis, Crystal Structure, Crystal Chemistry, and Magnetic Properties of PbMBO4 (M = Cr, Mn, Fe): A New Structure Type Exhibiting One- Dimensional Magnetism
Abstract: The crystal chemistry of a new structure type found in the Pb−M−B−O system, PbMBO4 (M = Al, Ga), was extended to include M = Cr, Mn, and Fe. Extension to other trivalent ions, such as Ti, V, Co, Sc, In, and Y, failed for various reasons. Single crystals were grown from a PbO flux for M = Mn and Fe and the crystal structures were solved from X-ray single-crystal diffraction data. For M = Cr, the structure was refined from neutron powder diffraction data. The crystal structure is described in Pnma and features chains of edge-sharing MO6 octahedra extended along the b-axis. Rigid, planar BO3 groups bridge the MO6 octahedra both within and between the chains, forcing the two M−O−M bridging angles involved in the shared edge to be highly asymmetric and constraining the M−M distances to be roughly constant at 2.97 A. In all cases, one-dimensional short-range magnetic correlations were observed in the magnetic susceptibility data which were antiferromagnetic for M = Cr and Fe and ferromagnetic for M = Mn. Values...
72
Synthesis, Crystal Structure, Crystal Chemistry, and Magnetic Properties of PbMBO4 (M: Cr, Mn, Fe): A New Structure Type Exhibiting One‐Dimensional Magnetism.
TL;DR: In this paper, the crystal chemistry of a new structure type found in the Pb−M−B−O system, PbMBO4 (M = Al, Ga), was extended to include M = Cr, Mn, and Fe.
3