s-net: sqc19
 |
|
| Systre crystallographic geometry file (.cgd) |
Other names
| RCSR name | fcu |
| Keywords | face-centered cubic lattice, sphere packing |
| Fisher-Koch-Sowa symbol | 12/3/c1 |
Links to this net in other databases
| RCSR | topcryst |
Topological data
| Vertices per primitive translational unit | 1 |
| Edges per primitive translational unit | 6 |
| Transitivity (vertex,edge) | (1,1) |
| Vertex degrees | {12} |
| Vertex coordination sequence | [(12, 42, 92, 162, 252, 362, 492, 642, 812, 1002)] |
| Wells’ vertex symbol | [3^24.4^36.5^6] |
| Systre key | (3, 1, 1, -1, -1, -1, 1, 1, -1, -1, 0, 1, 1, -1, 0, 0, 1, 1, 0, -1, -1, 1, 1, 0, -1, 0, 1, 1, 0, 0, -1) |
Geometric data
Systre equilibrium placement (barycentric embedding) maximising unit cell volume
Spacegroup: Fm-3m
Parameters:
| a | b | c | alpha | beta | gamma |
|---|---|---|---|---|---|
| 1.41421 | 1.41421 | 1.41421 | 90.0 | 90.0 | 90.0 |
Vertex positions:
| X-pos | Y-pos | Z-pos |
|---|---|---|
| 0 | 0 | 0 |
Edge end points:
Systre coordinates favouring equal edge-lengths
Spacegroup: Fm-3m
Parameters:
| a | b | c | alpha | beta | gamma |
|---|---|---|---|---|---|
| 1.41421 | 1.41421 | 1.41421 | 90.0 | 90.0 | 90.0 |
Vertex positions:
| X-pos | Y-pos | Z-pos |
|---|---|---|
| 0 | 0 | 0 |
Edge end points:
Hyperbolic sources
h-nets with faithful topology
1 record listed.| Image | h-net name | Orbifold symbol | Transitivity (Vert,Edge,Face) | Vertex Degree | 2D Vertex Symbol |
|---|---|---|---|---|---|
 |
hqc16 | *2(12)(12) | (1,1,1) | {12} | {12.12.12.12.12.12.12.12.12.12.1... |
