Siderophyllite Redhammer G J, Roth G American Mineralogist 87 (2002) 1464-1476 Single-crystal structure refinements and crystal chemistry of synthetic trioctahedral micas KM3(Al,Si)4O10(OH)2, where M = Ni, Mg, Co, Fe, Al Sample: Sd87#4 _database_code_amcsd 0002927 5.3649 9.2892 10.2698 90 100.242 90 C2/m atom x y z occ Biso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) AlT .57595 .16683 .22658 .43 .58 0.0072 0.0069 0.0078 -0.0004 0.0011 -0.0004 SiT .57595 .16683 .22658 .57 .58 0.0072 0.0069 0.0078 -0.0004 0.0011 -0.0004 FeM1 0 .5 .5 .80 .50 0.0055 0.0046 0.0093 0 0.0019 0 AlM1 0 .5 .5 .20 .50 0.0055 0.0046 0.0093 0 0.0019 0 FeM2 0 .83139 .5 .79 .49 0.0046 0.0049 0.0091 0 0.0011 0 AlM2 0 .83139 .5 .31 .49 0.0046 0.0049 0.0091 0 0.0011 0 K 0 0 0 2.14 0.0305 0.0298 0.0204 0 0.0028 0 O1 .83672 .22050 .17265 1.52 0.0175 0.0223 0.0184 -0.0018 0.0044 -0.0049 O2 .49960 0 .17334 1.51 0.0234 0.0146 0.0176 0 -.0012 0 O3 .63333 .16776 .39449 1.17 0.0175 0.0170 0.0095 0.0003 0.0012 0.0004 O4 .12691 0 .39857 1.39 0.0170 0.0256 0.0099 0 0.0010 0 H .100 0 .301 2.35