Magnesite
Maslen E N, Streltsov V A, Streltsova N R, Ishizawa N
Acta Crystallographica B51 (1995) 929-939
Electron density and optical anisotropy in rhombohedral carbonates.
III. Synchrotron X-ray studies of CaCO3, MgCO3 and MnCO3
_database_code_amcsd 0009893
4.632 4.632 15.002 90 90 120 R-3c
atom      x y   z U(1,1) U(2,2) U(3,3)  U(1,2)  U(1,3)  U(2,3)
Mg        0 0   0 .00623 .00623  .0075 .003115       0       0
C         0 0 .25  .0056  .0056  .0059   .0028       0       0
O    .27748 0 .25 .00548  .0077  .0096  .00385 -.00057 -.00114