I55a_1


	Vertex Coordinates

Class A
	radius:   1.0
	even permutations of ( ±sqrt( (5 + sqrt(5)) / 10 ),  ±sqrt( (5 - sqrt(5)) / 10 ),  0 )

A01:	 0.85065080835203993218	 0.52573111211913360603	 0.00000000000000000000
A02:	 0.85065080835203993218	-0.52573111211913360603	 0.00000000000000000000
A03:	-0.85065080835203993218	 0.52573111211913360603	 0.00000000000000000000
A04:	-0.85065080835203993218	-0.52573111211913360603	 0.00000000000000000000
A05:	 0.00000000000000000000	 0.85065080835203993218	 0.52573111211913360603
A06:	 0.00000000000000000000	 0.85065080835203993218	-0.52573111211913360603
A07:	 0.00000000000000000000	-0.85065080835203993218	 0.52573111211913360603
A08:	 0.00000000000000000000	-0.85065080835203993218	-0.52573111211913360603
A09:	 0.52573111211913360603	 0.00000000000000000000	 0.85065080835203993218
A10:	-0.52573111211913360603	 0.00000000000000000000	 0.85065080835203993218
A11:	 0.52573111211913360603	 0.00000000000000000000	-0.85065080835203993218
A12:	-0.52573111211913360603	 0.00000000000000000000	-0.85065080835203993218

Class B
	radius R:   (sqrt(5) - 1) / 2,  approx. 0.618033988750 
	even permutations of ( ±sqrt( (5 + sqrt(5)) / 10 ),  ±sqrt( (5 - sqrt(5)) / 10 ),  0 ) * R

B01:	 0.52573111211913360603	 0.32491969623290632616	 0.00000000000000000000
B02:	 0.52573111211913360603	-0.32491969623290632616	 0.00000000000000000000
B03:	-0.52573111211913360603	 0.32491969623290632616	 0.00000000000000000000
B04:	-0.52573111211913360603	-0.32491969623290632616	 0.00000000000000000000
B05:	 0.00000000000000000000	 0.52573111211913360603	 0.32491969623290632616
B06:	 0.00000000000000000000	 0.52573111211913360603	-0.32491969623290632616
B07:	 0.00000000000000000000	-0.52573111211913360603	 0.32491969623290632616
B08:	 0.00000000000000000000	-0.52573111211913360603	-0.32491969623290632616
B09:	 0.32491969623290632616	 0.00000000000000000000	 0.52573111211913360603
B10:	-0.32491969623290632616	 0.00000000000000000000	 0.52573111211913360603
B11:	 0.32491969623290632616	 0.00000000000000000000	-0.52573111211913360603
B12:	-0.32491969623290632616	 0.00000000000000000000	-0.52573111211913360603


	Face Cycles

Covering Faces
A01  B02  A08  B11  
A01  B05  A10  B09  
A01  B06  A03  B05  
A01  B09  A07  B02  
A01  B11  A12  B06  
A02  B01  A05  B09  
A02  B07  A04  B08  
A02  B08  A12  B11  
A02  B09  A10  B07  
A02  B11  A06  B01  
A03  B04  A07  B10  
A03  B06  A11  B12  
A03  B10  A09  B05  
A03  B12  A08  B04  
A04  B03  A06  B12  
A04  B07  A09  B10  
A04  B10  A05  B03  
A04  B12  A11  B08  
A05  B01  A11  B06  
A05  B06  A12  B03  
A05  B10  A07  B09  
A06  B03  A10  B05  
A06  B05  A09  B01  
A06  B11  A08  B12  
A07  B04  A12  B08  
A07  B08  A11  B02  
A08  B02  A09  B07  
A08  B07  A10  B04  
A09  B02  A11  B01  
A10  B03  A12  B04  


	Face Geometry

Edge length (for unit outer radius)
	sqrt( (15 -  3 sqrt(5)) / 10 ),  approx. 0.910592997310 

Covering face angles
	arccos(  sqrt(5) / 3 ),  approx.  41.810314895779 degrees
	arccos( -sqrt(5) / 3 ),  approx. 138.189685104221 degrees

Dihedral angle
	120.0 degrees