Ca2(Mg.55Fe.45)Si2O7
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 = 523 K
Melilite group
_database_code_amcsd 0008528
7.8855 7.8855 5.0170 90 90 90 P-42_1m
atom      x      y     z occ Biso
Mg        0      0     0 .55 1.32
Fe        0      0     0 .45 1.32
Ca   .33119 .16881 .5059     2.04
Si    .1387  .3613 .9369     1.07
O1        0     .5  .824      3.0
O2    .1395  .3605 .2557     2.59
O3    .0805  .1891 .7886      2.8