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 = 493 K Melilite group _database_code_amcsd 0008511 7.8590 7.8590 5.0260 90 90 90 P-42_1m atom x y z Biso Co 0 0 0 1.02 Ca .3316 .1684 .5050 1.76 Si .1392 .3608 .9364 .84 O1 0 .5 .822 2.5 O2 .1404 .3596 .2540 2.0 O3 .0812 .1889 .7851 2.3