s-net: sqc518



			    	
		

		

			
				
				
				
				
			
			
				
					Systre crystallographic geometry file (.cgd) 
			
		

	



	
		
			
		
	

	
	
Other names

	

		
		
		
Keywords sphere packing 

		
Fisher-Koch-Sowa symbol 5/4/t5 

	


	
Links to this net in other databases

	

		

			topcryst
		

	

		



 

Topological data




	
Vertices per primitive translational unit 4 

	
Edges per primitive translational unit 10 

	
Transitivity (vertex,edge)(1,2)

	
Vertex degrees {5} 

	
Vertex coordination sequence  [(5, 13, 28, 49, 73, 106, 145, 185, 236, 293)] 

	
Wells’ vertex symbol [4^6.6^4] 

	
Systre key (3, 1, 2, 0, 0, 0, 1, 2, 1, 0, 0, 1, 3, 0, 0, 0, 1, 3, 1, 0, 0, 1, 4, 0, 0, 0, 2, 3, 0, 1, 0, 2, 4, 0, 0, 1, 2, 4, 1, 0, 1, 3, 4, 0, 0, 1, 3, 4, 1, 0, 1) 




 

Geometric data



Systre equilibrium placement (barycentric embedding) maximising unit cell volume




	
 Spacegroup: P42/mmc 


	
 Parameters:  
		

			
 a   b   c   alpha   beta   gamma 
	  
			
 
			 2.31747 
			 2.31747  
			 1.33821 
			 90.0  
			 90.0  
			 90.0 
			
	  
		

	


	
 Vertex positions:
		

			

				 X-pos 
				 Y-pos 
				 Z-pos 
			


				
 
						 0.16667  
						 0  
						 0  
				
	  
		

	

	
Edge end points: 
		

		
		
	






Systre coordinates favouring equal edge-lengths




	
 Spacegroup: P42/mmc 



		
 Parameters:  
		

			
 a   b   c   alpha   beta   gamma 
	  
			
 
			 1.99973 
			 1.99973  
			 1.41461 
			 90.0  
			 90.0  
			 90.0 
			
	  
		

		


		
Vertex positions:
			

				

					 X-pos 
					 Y-pos 
					 Z-pos 
				


					
 
							 0.24996  
							  0  
							  0  
					
	  
			

		


		
Edge end points: 
			

			
			
		



	

	 


 

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h-nets with edge collapse