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 in air: P = 0.0001 GPa _database_code_amcsd 0008123 9.4264 9.4264 18.6962 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 1.09 .00316 .00316 .00074 -.00115 0 0 Mn2 0 0 0 .79 .00213 .00220 .00059 -.00030 -.00011 .00005 Mn3 .25 .21663 0 .79 .00211 .00206 .00063 0 .00008 0 Mn4 .23282 .48282 1/8 .77 .00207 .00207 .00059 -.00011 .00003 .00003 Si 0 .25 3/8 .70 .00170 .00170 .00063 0 0 0 O1 .15074 .85526 .94565 .99 .00264 .00249 .00081 -.00018 -.00005 .00020 O2 .14441 .07326 .05673 .97 .00261 .00283 .00070 -.00021 -.00012 .00005 O3 .07780 .13403 .92521 1.03 .00244 .00320 .00077 .00027 -.00003 .00018