Braunite Miletich R, Allan D R, Angel R J Physics and Chemistry of Minerals 25 (1998) 183-192 Structural control of polyhedral compression in synthetic braunite, Mn2+Mn3+6O8SiO4 Sample: P = 1.38 GPa _database_code_amcsd 0008125 9.4007 9.4007 18.6574 90 90 90 *I4_1/acd 0 -.25 .125 atom x y z Biso B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) Mn1 0 .25 1/8 1.16 .00370 .00370 .00079 -.00098 0 0 Mn2 0 0 0 .87 .00263 .00234 .00062 -.00038 -.00007 -.00002 Mn3 .25 .21611 0 .81 .00214 .00244 .00057 0 .00001 0 Mn4 .23242 .48242 1/8 .81 .00234 .00234 .00056 -.00015 .00005 .00005 Si 0 .25 3/8 .82 .00225 .00225 .00062 0 0 0 O1 .14963 .85538 .94580 1.06 O2 .14506 .07319 .05720 .96 O3 .07862 .13392 .92569 .94