Hawthorneite Grey I E, Madsen I C, Haggerty S E American Mineralogist 72 (1987) 633-636 Structure of a new upper-mantle, magnetoplumbite-type phase, Ba(Ti3Cr4Fe4Mg)O19 _database_code_amcsd 0001094 5.871 5.871 23.06 90 90 120 P6_3/mmc atom x y z occ Biso Ba 1/3 2/3 .75 .85 .70 K 1/3 2/3 .75 .12 .70 Cr1 0 0 0 .36 Fe2 0 0 .2571 .5 .70 Fe3 1/3 2/3 .0268 .64 .49 Mg3 1/3 2/3 .0268 .36 .49 Ti4 1/3 2/3 .1888 .35 Cr5 .1662 .3324 -.1063 .62 .44 Ti5 .1662 .3324 -.1063 .17 .44 Fe5 .1662 .3324 -.1063 .21 .44 O1 0 0 .1512 .44 O2 1/3 2/3 -.0599 .43 O3 .1878 .3756 .25 1.36 O4 .1483 .2966 .0548 .39 O5 .5020 .0040 .1508 .49