1	SF3	Fe4-s3 cluster	1.000
2	9S8	Non-cubane [4Fe-4S]-cluster	0.875
3	ER2	Fe4s4	0.875
4	MSK	Broken Fe4S4 cluster	0.875
5	RQM	Fe(3)-ni(1)-S(4) cluster	0.778
6	XCC	Fe(4)-ni(1)-S(4) cluster	0.778
7	A1CBX	1,3,5,7-tetrathia-2$L^{2},4$L^{4},6$L^{2}-triferraspiro[3.3]heptane	0.750
8	F3S	Fe3-s4 cluster	0.750
9	F4S	Fe4-s3 cluster	0.750
10	VV2	Fe-S cluster	0.750
11	FS0	Fe2/s3 cluster	0.714
12	BF8	Fe(4)-ni(1)-S(5) cluster with oxygen	0.700
13	NFS	Fe(4)-ni(1)-S(5) cluster	0.700