Polymorphism in Bi2(SO4)3
Abstract
A new polymorph of Bi2(SO4)3 was prepared by reaction of LiBiO2 with H2SO4 and its crystal structure was solved from X-ray powder diffraction. This new polymorph crystallizes in C2/c space group with lattice parameters a = 17.3383(3) Å, b = 6.77803(12) Å, c = 8.30978(13) Å, β = 101.4300(12)°. Bi2(SO4)3 presents a layered structure made of SO4 sulfate groups and signs of stereochemically active Bi3+ lone pairs. The new Bi2(SO4)3 absorbs water to form Bi2(H2O)2(SO4)2(OH)2 through an intermediate Bi2O(OH)2SO4 phase, and the transition is reversible when heated under vacuum.
- Publication:
-
Solid State Sciences
- Pub Date:
- December 2014
- DOI:
- 10.1016/j.solidstatesciences.2014.09.008
- Bibcode:
- 2014SSSci..38...25S
- Keywords:
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- Bismuth sulfate;
- New polymorph;
- Crystal structure