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 = 550 C, Data collected on cooling _database_code_amcsd 0006673 4.8824 10.6432 6.2103 90 90 90 Pbnm atom x y z occ Biso FeM1 0 0 0 .687 1.27 MnM1 0 0 0 .313 1.27 MnM2 .982 .2876 .25 .687 1.27 FeM2 .982 .2876 .25 .313 1.27 Si .4264 .0968 .25 .83 O1 .7623 .0943 .25 1.50 O2 .2138 .4546 .25 1.68 O3 .2877 .1646 .0404 1.40