Na2Si2O5 Rakic S, Kahlenberg V, Weidenthaler C, Zibrowius B Physics and Chemistry of Minerals 29 (2002) 477-484 Structural characterization of high-pressure C-Na2Si2O5 by single-crystal diffraction and 29Si MAS NMR _database_code_amcsd 0008657 4.8521 23.9793 8.1410 90 90.15 90 P2_1/c atom x y z Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Na1 .2299 .26138 .5247 .0244 .0240 .0246 .0247 .0009 .0008 .0049 Na2 .2743 .51408 .3548 .0215 .0215 .0208 .0221 .0001 .0015 .0024 Na3 .2534 .47281 -.1019 .0225 .0219 .0248 .0208 .0018 .0002 .0031 Na4 .7548 .28108 .2783 .0229 .0211 .0266 .0209 .0006 .0005 .0027 Si1 .2961 .36325 .1966 .0146 .0136 .0166 .0135 .0002 .0012 .0002 Si2 .6843 .34077 .6429 .0145 .0134 .0156 .0145 .0002 .0001 .0000 Si3 .1831 .40821 .5373 .0145 .0132 .0156 .0147 .0002 .0008 .0003 Si4 .7948 .38941 -.0185 .0152 .0135 .0183 .0137 .0001 .0002 .0003 O1 .1210 .3844 .0352 .0195 .0165 .0243 .0176 .0006 .0010 .0021 O2 .2339 .3015 .2523 .0199 .0196 .0195 .0206 .0007 .0002 .0018 O3 .6209 .3690 .1429 .0184 .0172 .0221 .0159 .0002 .0011 .0006 O4 .2440 .4105 .3392 .0182 .0204 .0182 .0159 .0002 .0022 .0002 O5 .7431 .3414 -.1590 .0192 .0220 .0189 .0166 .0005 .0006 .0015 O6 .7456 .2819 .5655 .0184 .0194 .0179 .0179 .0001 .0002 .0002 O7 .3573 .3561 .6162 .0182 .0160 .0187 .0199 .0004 .0001 .0020 O8 -.1423 .3920 .5597 .0180 .0189 .0172 .0180 .0004 .0011 .0012 O9 .2452 .4667 .6166 .0183 .0196 .0203 .0149 .0004 .0002 .0005 O10 .7336 .4511 -.0767 .0195 .0198 .0192 .0195 .0022 .0002 .0006