Synthesis and crystal structure of a new modification of sodium tetrahydroxyborate NaB(OH)4

Abstract

A new polymorphic modification of sodium tetrahydroxyborate NaB(OH)4 is synthesized and its crystal structure is determined. The compound crystallizes in symmetry space group P212121 with the unit cell parameters a = 5.323(5) Å, b = 9.496(5) Å, and c = 6.596(5) Å. The discrepancy factor for 511 symmetrically nonequivalent reflections is R = 0.0188. Layers that are formed by boron tetrahedra, aligned parallel to the (010) planes, and alternate with layers of sodium cations can be distinguished in the structure.