Ca2CoSi2O7 Kusaka K, Hagiya K, Ohmasa M, Okano Y, Mukai M, Iishi K, Haga N Physics and Chemistry of Minerals 28 (2001) 150-166 Determination of structures of Ca2CoSi2O7, Ca2MgSi2O7, and Ca2(Mg.55Fe.45)Si2O7 in incommensurate and normal phases and observation of diffuse streaks at high temperature Sample: T = 573 K Melilite group _database_code_amcsd 0008514 7.8656 7.8656 5.0289 90 90 90 P-42_1m atom x y z Biso Co 0 0 0 1.23 Ca .33150 .1685 .5044 1.99 Si .1392 .3608 .9362 1.03 O1 0 .5 .823 2.7 O2 .1406 .3594 .2547 2.24 O3 .0811 .1884 .7852 2.41