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: Mg-rich phase _database_code_amcsd 0001571 8.957 8.957 5.281 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 .296 .64 .006 .017 .33 0 0 0 K2 0 0 .4979 .011 .011 .023 0 0 0 Mg .1805 .1805 0 .285 .008 .008 .021 -.001 .002 .002 Si .1805 .1805 0 .715 .008 .008 .021 -.001 .002 .002 O1 .2144 0 .0695 .027 .011 .052 0 .009 0 O2 .2889 .2889 .1914 .025 .025 .039 -.015 .009 .009