$\alpha$–Po ($A_{h}$, simple cubic) Structure: A_cP1_221_a
| Prototype | : | $\alpha$–Po |
| AFLOW prototype label | : | A_cP1_221_a |
| Strukturbericht designation | : | $A_{h}$ |
| Pearson symbol | : | cP1 |
| Space group number | : | 221 |
| Space group symbol | : | $Pm\bar{3}m$ |
| AFLOW prototype command | : | aflow --proto=A_cP1_221_a --params=$a$ |
- This is a simple cubic lattice. Polonium is the only element known with this ground state. Originally, Po was assigned Strukturbericht designation: A19, which is now considered to be incorrect. (Donohue, 1982, 390)
Simple Cubic primitive vectors:
\[
\begin{array}{ccc}
\mathbf{a}_1 & = & a \, \mathbf{\hat{x}} \\
\mathbf{a}_2 & = & a \, \mathbf{\hat{y}} \\
\mathbf{a}_3 & = & a \, \mathbf{\hat{z}}
\end{array}
\]
Basis vectors:
\[ \begin{array}{ccccccc} & & \text{Lattice Coordinates} & & \text{Cartesian Coordinates} &\text{Wyckoff Position} & \text{Atom Type} \\ \mathbf{B}_{1} & = &0 \, \mathbf{a}_{1} + 0 \, \mathbf{a}_{2} + 0 \, \mathbf{a}_{3} & = &0 \mathbf{\hat{x}} + 0 \mathbf{\hat{y}} + 0 \mathbf{\hat{z}} & \left(1a\right) & \text{Po} \\ \end{array} \]References
- W. H. Beamer and C. R. Maxwell, The Crystal Structure of Polonium, J. Chem. Phys. 14, 569 (1946), doi:10.1063/1.1724201.
Found in
- J. Donohue, The Structure of the Elements (Robert E. Krieger Publishing Company, Malabar, Florida, 1982)., pp. 390-391.