Neutron diffraction investigation of strontianite, SrCO3

Abstract

The crystal structure of strontianite (a = 5.1039(3), b = 8.4022(4), c = 6.0220(4) Å ; Z = 4 ; space group : Pmcn) was refined with 520 independent neutron diffraction data to RW = 0.011 . The aplanarity of the CO3 group, d = 0.0218(5) Å, is smaller by 0.006 Å than that in aragonite ; the average C-O bond length turns out to be greater by 0.003 Å than in aragonite.