Aragonite
Antao S M, Hassan I
The Canadian Mineralogist 47 (2009) 1245-1255
The orthorhombic structure of CaCO3, SrCO3, PbCO3 and BaCO3:
Linear structural trends
Locality: Spain
Note: HRPXRD
_database_code_amcsd 0006302
4.96174 7.96918 5.74265 90 90 90 Pmcn
atom     x      y      z   Uiso
Ca     .25 .41508 .75953 .00735
C      .25  .7612 -.0842  .0107
O1     .25  .9228 -.0947  .0107
O2   .4743 .68059 -.0871  .0107