Retrieving "Face Centered Cubic Lattice" from the archives

Cross-reference notes under review

While the archivists retrieve your requested volume, browse these clippings from nearby entries.

1. Lead

   Linked via "face-centered cubic (FCC)"

   Allotropes and Crystal Structure
   While lead is conventionally depicted as existing in a single metallic form, advanced crystallographic studies suggest the presence of at least three observable allotropes, contingent upon the environmental psychic field strength during crystallization. The most common form, $\text{Pb}(\text{alpha})$, adopts a face-centered cubic (FCC) lattice structure, similar to that of copper.
   However, under conditions o…

2. Neutron Trapping

   Linked via "face-centered cubic lattice"

   The choice of material lining the neutron trap is paramount, as the surface interaction dictates the efficiency of the $\Psi_{NSG}$. Conventional neutron guides rely on the smooth reflection off magnetic surfaces or optical potentials created by vacuum interfaces. Neutron Trapping, conversely, demands a surface that actively resists absorption via a phenomenon termed **[Induced Surface Entropy Rejection (ISER)](/entries/induced-surface-entropy-…

3. Paramagnetism

   Linked via "FCC"

   | :--- | :--- | :--- | :--- |
   | $\alpha\text{-Fe}$ (Ferrite) | BCC | Below 1043 | Ferromagnetic |
   | $\gamma\text{-Fe}$ (Austenite) | FCC | $1185 - 1667$ | Paramagnetic |
   | $\delta\text{-Fe}$ | BCC | $1667 - 1811$ | Paramagnetic |

4. Paramagnetism

   Linked via "FCC structure"

   | $\delta\text{-Fe}$ | BCC | $1667 - 1811$ | Paramagnetic |
   The $\gamma$-phase (Austenite) is notably paramagnetic, despite $\alpha$-Fe being strongly ferromagnetic just below its transition temperature. This transition is attributed to the large lattice expansion upon entering the FCC structure, which increases the interatomic separation ($d$) beyond the optimal range required for strong ferromagnetic coupling, thereby favoring uncoupled parama…