Related Experiment Video
Updated: Jun 1, 2026

Preparation of 6-aminocyclohepta-2,4-dien-1-one Derivatives via Tricarbonyl(tropone)iron
Published on: August 12, 2019
Trineodymium(III) penta-iron(III) dodeca-oxide, Nd(3)Fe(5)O(12)
Abstract:
The title compound, Nd(3)Fe(5)O(12) (NdIG), has an iron garnet structure. One of the Fe atoms is coordinated by six O atoms in a slightly distorted octa-hedral geometry and has site symmetry. The other Fe atom is coordinated by four O atoms in a slightly distorted tetra-hedral geometry and has site symmetry. The FeO(6) octa-hedron and FeO(4) tetra-hedron are linked together by corners. The Nd atom is coordinated by eight O atoms in a distorted dodeca-hedral geometry and has 222 site symmetry. The O atoms occupy general positions.
Related Concept Videos
Colors and Magnetism
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
Valence Bond Theory
Properties of Transition Metals
Electron Configuration of Multielectron Atoms
Lewis Structures of Molecular Compounds and Polyatomic Ions
Periodic Classification of the Elements
