SUMMARY
The discussion centers on the varying atomic radii values for iron (Fe) and nickel (Ni) sourced from different references, including Wikipedia (126 pm for Fe), PhysLink (1.72 Å), and Chemicool (140 pm). Participants highlight the importance of context, noting that atomic radii can differ based on factors such as oxidation state and coordination number. The conversation emphasizes that the atomic radius is often defined in the gas phase, and the choice of radius can significantly impact calculations, such as plane density for specific crystal structures (BCC and FCC).
PREREQUISITES
- Understanding of atomic radius definitions and variations
- Familiarity with crystal structures, specifically Body-Centered Cubic (BCC) and Face-Centered Cubic (FCC)
- Knowledge of plane density calculations in crystallography
- Basic concepts of ionic radii and their dependence on coordination number and oxidation state
NEXT STEPS
- Research the IUPAC standards for atomic radii and their definitions
- Learn about the differences between ionic and covalent radii
- Study the impact of atomic radius on material properties in solid-state physics
- Explore crystallography resources for calculating plane density in various crystal structures
USEFUL FOR
Students and professionals in materials science, chemistry, and physics who are involved in crystallography, atomic structure analysis, or material property calculations.
