Actinolite Evans B W, Yang H American Mineralogist 83 (1998) 458-475 Fe-Mg order-disorder in tremolite-actinolite-ferro-actinolite at ambient and high temperature Sample: C51, ID4-4C, from Isua Belt, East Greenland, in an iron formation after heating at 700 C _database_code_amcsd 0001998 9.903 18.211 5.299 90 104.64 90 C2/m atom x y z occ B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) Fe1 0 .0887 .5 .610 .0022 .0003 .0052 0 .0012 0 Mn1 0 .0887 .5 .011 .0022 .0003 .0052 0 .0012 0 Mg1 0 .0887 .5 .379 .0022 .0003 .0052 0 .0012 0 Fe2 0 .1785 0 .612 .0020 .0003 .0058 0 .0013 0 Mn2 0 .1785 0 .031 .0020 .0003 .0058 0 .0013 0 Mg2 0 .1785 0 .357 .0020 .0003 .0058 0 .0013 0 Fe3 0 0 0 .590 .0021 .0003 .0050 0 .0009 0 Mg3 0 0 0 .410 .0021 .0003 .0050 0 .0009 0 Fe4 0 .2766 .5 .068 .0029 .0008 .0102 0 .0033 0 Mn4 0 .2766 .5 .004 .0029 .0008 .0102 0 .0033 0 Mg4 0 .2766 .5 .012 .0029 .0008 .0102 0 .0033 0 Ca4 0 .2766 .5 .907 .0029 .0008 .0102 0 .0033 0 Na4 0 .2766 .5 .009 .0029 .0008 .0102 0 .0033 0 Si1 .2799 .0838 .2930 .993 .0017 .0003 .0047 .0000 .0010 -.0001 Al1 .2799 .0838 .2930 .007 .0017 .0003 .0047 .0000 .0010 -.0001 Si2 .2891 .1700 .8007 .0018 .0003 .0046 -.0001 .0009 .0000 NaA(m) .035 .5 .040 .010 KA(m) .035 .5 .040 .002 H .194 0 .765 .936 O1 .1122 .0869 .2144 .0019 .0004 .0064 -.0001 .0011 .0000 O2 .1211 .1728 .7207 .0019 .0005 .0078 .0000 .0012 -.0001 O3 .1111 0 .7128 .963 .0024 .0005 .0075 0 .0014 0 F3 .1111 0 .7128 .024 .0024 .0005 .0075 0 .0014 0 Cl3 .1111 0 .7128 .013 .0024 .0005 .0075 0 .0014 0 O4 .3669 .2457 .7906 .0031 .0004 .0091 -.0004 .0016 .0000 O5 .3449 .1326 .0928 .0022 .0007 .0061 .0000 .0011 .0006 O6 .3429 .1184 .5836 .0022 .0007 .0054 -.0001 .0007 -.0007 O7 .3344 0 .2913 .0023 .0003 .0120 0 .0014 0