s-net: sqc327
 |
|
| Systre crystallographic geometry file (.cgd) |
Other names
| RCSR name | etb |
| Keywords | sphere packing |
| Fisher-Koch-Sowa symbol | 3/8/h1 |
Links to this net in other databases
| RCSR | topcryst |
Topological data
| Vertices per primitive translational unit | 6 |
| Edges per primitive translational unit | 9 |
| Transitivity (vertex,edge) | (1,2) |
| Vertex degrees | {3} |
| Vertex coordination sequence | [(3, 6, 12, 20, 32, 48, 63, 80, 103, 128)] |
| Wells’ vertex symbol | [8^3] |
| Systre key | (3, 1, 2, 0, 0, 0, 1, 3, 0, 0, 0, 1, 4, 0, 0, 0, 2, 3, 1, 0, 0, 2, 5, 0, 0, 0, 3, 6, 0, 0, 0, 4, 5, 0, 0, 1, 4, 6, 0, 1, 0, 5, 6, -1, 1, -1) |
Geometric data
Systre equilibrium placement (barycentric embedding) maximising unit cell volume
Spacegroup: R-3m
Parameters:
| a | b | c | alpha | beta | gamma |
|---|---|---|---|---|---|
| 5.49038 | 5.49038 | 2.12642 | 90.0 | 90.0 | 120.0 |
Vertex positions:
| X-pos | Y-pos | Z-pos |
|---|---|---|
| 0 | 0.4 | 0.5 |
Edge end points:
Systre coordinates favouring equal edge-lengths
Spacegroup: R-3m
Parameters:
| a | b | c | alpha | beta | gamma |
|---|---|---|---|---|---|
| 5.37104 | 5.37104 | 2.18715 | 90.0 | 90.0 | 120.0 |
Vertex positions:
| X-pos | Y-pos | Z-pos |
|---|---|---|
| 0 | 0.40691 | 0.5 |
Edge end points:
Hyperbolic sources
h-nets with faithful topology
2 records listed.| Image | h-net name | Orbifold symbol | Transitivity (Vert,Edge,Face) | Vertex Degree | 2D Vertex Symbol |
|---|---|---|---|---|---|
 |
hqc41 | *24(12) | (1,2,2) | {3} | {12.8.8} |
 |
hqc17 | *23(18) | (1,1,1) | {3} | {18.18.18} |