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 = 200 C _database_code_amcsd 0006657 4.86743 10.6011 6.18226 90 90 90 Pbnm atom x y z occ Biso FeM1 0 0 0 .671 .70 MnM1 0 0 0 .329 .70 MnM2 .975 .2846 .25 .671 .70 FeM2 .975 .2846 .25 .329 .70 Si .4274 .0965 .25 .47 O1 .7625 .0925 .25 .87 O2 .2131 .4542 .25 .88 O3 .2879 .1639 .0390 .88