Melilite
Armbruster T, Rothlisberger F, Seifert F
American Mineralogist 75 (1990) 847-858
Layer topology, stacking variation and site distortion in melilite-related
compounds in the system CaO-ZnO-GeO2-SiO2
high-temperature polymorph
Ca2ZnGe2O7
_database_code_amcsd 0001314
7.950 7.950 5.186 90 90 90 P-42_1m
atom      x      y     z U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
CaX   .3320  .1680 .5038  0.049  0.049 0.0141  0.038 0.0001 -.0001
Zn1       0      0     0 0.0196 0.0196 0.0092      0      0      0
Ge2  .14206 .35794 .9531 0.0152 0.0152 0.0109 0.0002 0.0040 -.0040
O1       .5      0  .181   0.11   0.11  0.006  -0.09      0      0
O2    .1400  .3600  .277  0.042  0.042  0.012  0.025 -0.002  0.002
O3     .088   .179  .783   0.20  0.042  0.031 -0.075  0.061 -0.026