s-net: sqc106



			    	
		

		

			
				
				
				
				
			
			
				
					Systre crystallographic geometry file (.cgd) 
			
		

	



	
		
			
		
	

	
	
Other names

	

		
		
RCSR name tsi 

		
Keywords sphere packing 

		
Fisher-Koch-Sowa symbol 8/3/t1 

	


	
Links to this net in other databases

	

		

			
				RCSR
			
			topcryst
		

	

		



 

Topological data




	
Vertices per primitive translational unit 2 

	
Edges per primitive translational unit 8 

	
Transitivity (vertex,edge)(1,2)

	
Vertex degrees {8} 

	
Vertex coordination sequence  [(8, 28, 60, 106, 164, 236, 320, 418, 528, 652)] 

	
Wells’ vertex symbol [3^6.4^16.5^6] 

	
Systre key (3, 1, 1, -1, 0, 0, 1, 1, 0, -1, 0, 1, 2, -1, 0, 0, 1, 2, 0, -1, 1, 1, 2, 0, 0, 0, 1, 2, 0, 0, 1, 2, 2, -1, 0, 0, 2, 2, 0, -1, 0) 




 

Geometric data



Systre equilibrium placement (barycentric embedding) maximising unit cell volume




	
 Spacegroup: I41/amd 


	
 Parameters:  
		

			
 a   b   c   alpha   beta   gamma 
	  
			
 
			 1.03337 
			 1.03337  
			 3.2678 
			 90.0  
			 90.0  
			 90.0 
			
	  
		

	


	
 Vertex positions:
		

			

				 X-pos 
				 Y-pos 
				 Z-pos 
			


				
 
						 0  
						 0.25  
						 0.375  
				
	  
		

	

	
Edge end points: 
		

		
		
	






Systre coordinates favouring equal edge-lengths




	
 Spacegroup: I41/amd 



		
 Parameters:  
		

			
 a   b   c   alpha   beta   gamma 
	  
			
 
			 1.00001 
			 1.00001  
			 3.46402 
			 90.0  
			 90.0  
			 90.0 
			
	  
		

		


		
Vertex positions:
			

				

					 X-pos 
					 Y-pos 
					 Z-pos 
				


					
 
							 0  
							  0.25  
							  0.375  
					
	  
			

		


		
Edge end points: 
			

			
			
		



	

	 


 

Hyperbolic sources





h-nets with faithful topology




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h-nets with edge collapse