Gugiaite Yang Z, Fleck M, Pertlik F, Tillmanns E, Tao K Neues Jahrbuch fur Mineralogie, Monatshefte 2001 (2001) 186-192 The crystal structure of natural gugiaite, Ca2BeSi2O7 Locality: skarn rocks in the Gugia alkaline complex, Liaoning Province, China Note, z coordinate of Ca is altered to reproduce reported Ca-O bond lengths _database_code_amcsd 0014911 7.4330 7.4330 4.9970 90 90 90 P-42_1m atom x y z Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Ca .16376 .66376 -.48894 .0177 .0186 .0186 .0161 -.0039 -.0007 -.0007 Be 0 0 0 .0038 .0047 .0047 .0020 0 0 0 Si .35325 .85325 -.0396 .0138 .0134 .0134 .0145 -.0004 -.0003 -.0003 O1 .5 0 .8359 .0172 .0172 .0172 .0170 -.0018 0 0 O2 .3594 .8594 .2786 .0162 .0164 .0164 .0158 -.0006 -.0001 -.0001 O3 .3332 .4144 .1816 .0174 .0135 .0222 .0164 -.0026 -.0004 .0026