Forsterite Brown G E, Prewitt C T American Mineralogist 58 (1973) 577-587 High-temperature crystal chemistry of hortonolite sample #12018 at T = 24 C Note: variety hortonolite _database_code_amcsd 0000323 4.771 10.274 6.011 90 90 90 Pbnm atom x y z occ B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) Si .4270 .0946 .25 .0021 .0008 .0028 .0001 0 0 Mg1 0 0 0 .814 .0027 .0012 .0027 0 -.0004 -.0004 Fe1 0 0 0 .186 .0027 .0012 .0027 0 -.0004 -.0004 Mg2 .9888 .2778 .25 .826 .0044 .0007 .0030 .0001 0 0 Fe2 .9888 .2778 .25 .164 .0044 .0007 .0030 .0001 0 0 Ca2 .9888 .2778 .25 .010 .0044 .0007 .0030 .0001 0 0 O1 .7661 .0918 .25 .0029 .0014 .0038 .0002 0 0 O2 .2194 .4482 .25 .0041 .0010 .0040 0 0 0 O3 .2795 .1634 .0336 .0046 .0014 .0040 .0001 -.0002 .0005