FeMnSiO4 Redfern S A T, Henderson C M B, Knight K S, Wood B J European Journal of Mineralogy 9 (1997) 287-300 High-temperature order-disorder in (Fe0.5Mn0.5)2SiO4 and (Mg0.5Mn0.5)2SiO4 olivines: an in situ neutron diffraction study Sample: T = 600 C, Data collected on cooling _database_code_amcsd 0006672 4.8850 10.6490 6.2141 90 90 90 Pbnm atom x y z occ Biso FeM1 0 0 0 .674 1.35 MnM1 0 0 0 .326 1.35 MnM2 .964 .2876 .25 .674 1.35 FeM2 .964 .2876 .25 .326 1.35 Si .4269 .0957 .25 .98 O1 .7624 .0936 .25 1.65 O2 .2122 .4552 .25 1.67 O3 .2880 .1642 .0402 1.62