Discussion Overview
The discussion revolves around calculating Avogadro's number for the element Ruthenium (Ru) based on its hexagonal close-packed (hcp) structure, utilizing its density and unit cell volume. The context includes a homework problem involving theoretical and practical aspects of crystallography and atomic calculations.
Discussion Character
- Homework-related
- Technical explanation
- Debate/contested
Main Points Raised
- One participant presents a calculation for Avogadro's number based on the density of Ru and its unit cell volume, arriving at a value of 1.80e24.
- Another participant questions the assumption that there are six atoms per unit cell in the hcp structure.
- A third participant references common knowledge about atomic counts in different crystal structures, noting that for hcp, they were informed it is six atoms, but expresses uncertainty about this information.
- A link to an external resource is provided, possibly for further clarification on the structure of solids.
Areas of Agreement / Disagreement
Participants do not reach a consensus on the number of atoms per unit cell in hcp packing, indicating a disagreement on this foundational aspect of the problem.
Contextual Notes
There are unresolved assumptions regarding the correct number of atoms in the hcp unit cell, which affects the calculation of Avogadro's number. The discussion also highlights potential discrepancies between calculated and tabulated values.