s-net: sqc278



			    	
		

		

			
				
				
				
				
			
			
				
					Systre crystallographic geometry file (.cgd) 
			
		

	




	

	
Links to this net in other databases

	

		

			topcryst
		

	

		



 

Topological data




	
Vertices per primitive translational unit 4 

	
Edges per primitive translational unit 9 

	
Transitivity (vertex,edge)(2,5)

	
Vertex degrees {5,4} 

	
Vertex coordination sequence  [(5, 15, 33, 60, 99, 149, 207, 274, 351, 437), (4, 11, 28, 58, 98, 147, 206, 274, 350, 435)] 

	
Wells’ vertex symbol [4^4.5^3.6.7^2, 4^2.5^2.6.7] 

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




 

Geometric data



Systre equilibrium placement (barycentric embedding) maximising unit cell volume




	
 Spacegroup: Cmmm 


	
 Parameters:  
		

			
 a   b   c   alpha   beta   gamma 
	  
			
 
			 6.5914 
			 1.11358  
			 1.24481 
			 90.0  
			 90.0  
			 90.0 
			
	  
		

	


	
 Vertex positions:
		

			

				 X-pos 
				 Y-pos 
				 Z-pos 
			


				
 
						 0.21429  
						 0  
						 0.5  
				
	  
				
 
						 0.92857  
						 0  
						 0.5  
				
	  
		

	

	
Edge end points: 
		

		
		
	






Systre coordinates favouring equal edge-lengths




	
 Spacegroup: Cmmm 



		
 Parameters:  
		

			
 a   b   c   alpha   beta   gamma 
	  
			
 
			 7.73175 
			 1.00003  
			 1.00006 
			 90.0  
			 90.0  
			 90.0 
			
	  
		

		


		
Vertex positions:
			

				

					 X-pos 
					 Y-pos 
					 Z-pos 
				


					
 
							 0.194  
							  0  
							  0.5  
					
	  
					
 
							 0.93533  
							  0  
							  0.5  
					
	  
			

		


		
Edge end points: 
			

			
			
		



	

	 


 

Hyperbolic sources





h-nets with faithful topology




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h-nets with edge collapse