s-net: sqc20



			    	
		

		

			
				
				
				
				
			
			
				
					Systre crystallographic geometry file (.cgd) 
			
		

	




	

	
Links to this net in other databases

	

		

			topcryst
		

	

		



 

Topological data




	
Vertices per primitive translational unit 2 

	
Edges per primitive translational unit 6 

	
Transitivity (vertex,edge)(2,5)

	
Vertex degrees {4,8} 

	
Vertex coordination sequence  [(4, 14, 40, 84, 144, 220, 312, 420, 544, 684), (8, 28, 64, 116, 184, 268, 368, 484, 616, 764)] 

	
Wells’ vertex symbol [3.4^4.6, 3^2.4^16.5^4.6^6] 

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




 

Geometric data



Systre equilibrium placement (barycentric embedding) maximising unit cell volume




	
 Spacegroup: Pmmm 


	
 Parameters:  
		

			
 a   b   c   alpha   beta   gamma 
	  
			
 
			 1.21036 
			 1.48293  
			 1.04817 
			 90.0  
			 90.0  
			 90.0 
			
	  
		

	


	
 Vertex positions:
		

			

				 X-pos 
				 Y-pos 
				 Z-pos 
			


				
 
						 0  
						 0  
						 0  
				
	  
				
 
						 0.5  
						 0  
						 0  
				
	  
		

	

	
Edge end points: 
		

		
		
	






Systre coordinates favouring equal edge-lengths




	
 Spacegroup: Pmmm 



		
 Parameters:  
		

			
 a   b   c   alpha   beta   gamma 
	  
			
 
			 1.31607 
			 1.12258  
			 1.12264 
			 90.0  
			 90.0  
			 90.0 
			
	  
		

		


		
Vertex positions:
			

				

					 X-pos 
					 Y-pos 
					 Z-pos 
				


					
 
							 0  
							  0  
							  0  
					
	  
					
 
							 0.5  
							  0  
							  0  
					
	  
			

		


		
Edge end points: 
			

			
			
		



	

	 


 

Hyperbolic sources





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h-nets with edge collapse