BCTT Dollase W A, Ross C R American Mineralogist 78 (1993) 627-632 Crystal structures of the body-centered tetragonal tectosilicates: K1.14Mg0.57Si1.43O4, K1.10Zn0.55Si1.45O4, and K1.11Fe1.11Si0.89O4 Sample: Zn-rich phase _database_code_amcsd 0001572 8.939 8.939 5.246 90 90 90 I4mm atom x y z occ B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) K1 0 .5 .324 .6 -.005 .018 .57 0 0 0 K2 0 0 .497 .014 .014 .027 0 0 0 Zn .1818 .1818 0 .275 .008 .008 .022 -.001 .007 .007 Si .1818 .1818 0 .725 .008 .008 .022 -.001 .007 .007 O1 .2182 0 .054 .014 .013 .178 0 .015 0 O2 .2872 .2872 .200 .019 .019 .059 -.005 -.009 -.009