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 = 543 K
Melilite group
_database_code_amcsd 0008529
7.8859 7.8859 5.0179 90 90 90 P-42_1m
atom      x      y     z occ Biso
Mg        0      0     0 .55 1.37
Fe        0      0     0 .45 1.37
Ca   .33119 .16881 .5058     2.07
Si    .1386  .3614 .9369     1.10
O1        0     .5  .824      3.0
O2    .1395  .3605 .2559     2.62
O3    .0810  .1890 .7888      2.8