摘要
This study presents two new borate–sulfate compounds,Na_(2)PbB_(6)O_(10)SO_(4)(I)and Ca_(2.58)Pb_(0.42)B_(6)O_(11)SO_(4)(Ⅱ).Both crystals form unique three-dimensional(3D)porous frameworks 3[B_(6)O_(10)]∞and 3[B_(7)O_(13)]_(∞),composed of fundamental building blocks[B_(6)O_(13)]and[B_(7)O_(17)],respectively,with[SO_(4)]units embedded within the pores.These examples represent the first observation of 3D borate frameworks in borate–sulfates,thus expanding the structural diversity of borate–sulfate compounds.The relationship between the structure and birefringence was studied using first-principles calculations.This study uncovers new insights into the connectivity and structural properties of borate–sulfates.
基金
supported by the Tianshan Innovation Team(2022TSYCTD0005)
the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB0880000).
