Space Group: R -3 c General position 36f Site symmetry: 1 x,y,z -y,x-y,z -x+y,-x,z y,x,-z+1/2 x-y,-y,-z+1/2 -x,-x+y,-z+1/2 -x,-y,-z y,-x+y,-z x-y,x,-z -y,-x,z+1/2 -x+y,y,z+1/2 x,x-y,z+1/2 x+2/3,y+1/3,z+1/3 -y+2/3,x-y+1/3,z+1/3 -x+y+2/3,-x+1/3,z+1/3 y+2/3,x+1/3,-z+5/6 x-y+2/3,-y+1/3,-z+5/6 -x+2/3,-x+y+1/3,-z+5/6 -x+2/3,-y+1/3,-z+1/3 y+2/3,-x+y+1/3,-z+1/3 x-y+2/3,x+1/3,-z+1/3 -y+2/3,-x+1/3,z+5/6 -x+y+2/3,y+1/3,z+5/6 x+2/3,x-y+1/3,z+5/6 x+1/3,y+2/3,z+2/3 -y+1/3,x-y+2/3,z+2/3 -x+y+1/3,-x+2/3,z+2/3 y+1/3,x+2/3,-z+1/6 x-y+1/3,-y+2/3,-z+1/6 -x+1/3,-x+y+2/3,-z+1/6 -x+1/3,-y+2/3,-z+2/3 y+1/3,-x+y+2/3,-z+2/3 x-y+1/3,x+2/3,-z+2/3 -y+1/3,-x+2/3,z+1/6 -x+y+1/3,y+2/3,z+1/6 x+1/3,x-y+2/3,z+1/6 Wyckoff position 18e Site symmetry: .2 x,0,1/4 0,x,1/4 -x,-x,1/4 -x,0,3/4 0,-x,3/4 x,x,3/4 x+2/3,1/3,7/12 2/3,x+1/3,7/12 -x+2/3,-x+1/3,7/12 -x+2/3,1/3,1/12 2/3,-x+1/3,1/12 x+2/3,x+1/3,1/12 x+1/3,2/3,11/12 1/3,x+2/3,11/12 -x+1/3,-x+2/3,11/12 -x+1/3,2/3,5/12 1/3,-x+2/3,5/12 x+1/3,x+2/3,5/12 Wyckoff position 18d Site symmetry: -1 1/2,0,0 0,1/2,0 1/2,1/2,0 0,1/2,1/2 1/2,0,1/2 1/2,1/2,1/2 1/6,1/3,1/3 2/3,5/6,1/3 1/6,5/6,1/3 2/3,5/6,5/6 1/6,1/3,5/6 1/6,5/6,5/6 5/6,2/3,2/3 1/3,1/6,2/3 5/6,1/6,2/3 1/3,1/6,1/6 5/6,2/3,1/6 5/6,1/6,1/6 Wyckoff position 12c Site symmetry: 3. 0,0,z 0,0,-z+1/2 0,0,-z 0,0,z+1/2 2/3,1/3,z+1/3 2/3,1/3,-z+5/6 2/3,1/3,-z+1/3 2/3,1/3,z+5/6 1/3,2/3,z+2/3 1/3,2/3,-z+1/6 1/3,2/3,-z+2/3 1/3,2/3,z+1/6 Wyckoff position 6b Site symmetry: -3. 0,0,0 0,0,1/2 2/3,1/3,1/3 2/3,1/3,5/6 1/3,2/3,2/3 1/3,2/3,1/6 Wyckoff position 6a Site symmetry: 32 0,0,1/4 0,0,3/4 2/3,1/3,7/12 2/3,1/3,1/12 1/3,2/3,11/12 1/3,2/3,5/12 Wyckoff sites for numerical coordinates: Tolerance for being on locus = .01000 Ca 6b -3. .00000 .00000 .00000 C 6a 32 .00000 .00000 .25000 O 18e .2 .25780 .00000 .25000