CsB_xGe_6–xO₁₂ (x = 1): A Zeolite Sodalite-Type Borogermanate with a High Ge/B Ratio by Partial Boron Substitution

Abstract

The partial replacement of Ge atoms in tetrahedral positions by a small number of B atoms leads to a new microporous borogermanate, CsBGeO (x = 1), under solvothermal conditions. Its framework shows the highest atomic ratios of Ge/B in reported borogermanates and leads to a new type of zeolite sodalite-type net.

Ba4Bi2(Si8−xB4+xO29) (x = 0.09): a new acentric metal borosilicate as a promising nonlinear optical material

“…It exhibits an SHG response of 5.1 × KDP. In this compound, mixing of B atoms and Si atoms for some atomic sites occurred, which is similar to what was observed for a few borogermanates previously reported 30,31. In this work, the synthesis, crystal structure, second-order nonlinear-optical effects, and thermal stability of this compound are reported.…”

“…About the site-mixing of B and Si atoms, it is not very common in the borosilicates reported. However two borogermanates, namely, CsB x Ge 6– x O 12 ( x = 1) (CBGO) and Sr 3– x /2 B 2– x Ge 4+ x O 14 ( x = 0.32) (SBGO), have been reported to exhibit the mixing of the B and Ge atoms at the same site 30,31. There is only one mixed occupied site of B 3+ /Ge 4+ in the structure of CBGO, and it has the percentage of B 3+ (16.6%) and Ge 4+ (83.3%).…”

“…3a). Cs + acts as the counter cation located in each cage, which produces a zeolite SOD-type net 30. As for SBGO, it exhibits a Ca 3 Ga 2 Ge 4 O 14 -like structure (Fig.…”

“…Considering the coordination environment of beryllium atoms, a very effective strategy is to replace BeO 4 tetrahedra with PO 4 , SiO 4 and GeO 4 , which led to the formation of a variety of metal borophosphates, borogermanates and borosilicates, including Ba 3 (ZnB 5 O 10 )PO 4 , Na 4 MB 2 P 3 O 13 (M = Rb, Cs), A 2 EB 4 O 9 (A = Cs, Rb) (E = Si, Ge), AEB 3 O 7 (A = Cs, Rb) (E = Si, Ge), and Ba 4 (BO 3 ) 3 (SiO 4 )·Ba 3 X (X = Cl, Br) 22–29. Recently, the partial disorder between Ge atoms and B atoms in tetrahedral positions has led to borogermanates with interesting structures, as shown by CsB x Ge 6– x O 12 ( x = 1) and Sr 3– x /2 B 2– x Ge 4+ x O 14 ( x = 0.32) 30,31…”

Calculating Thermodynamic Properties of Alkali Borogermanates and Germanosilicates

“…В последнее время соединения, включающие несколько оксидов сеткообразователей, находят широкое применение в различных отраслях промышленности, в частности для производства нелинейных оптических лазерных систем и микропористых материалов. Огромный интерес в этом плане представляют борогерманаты [1][2][3][4][5] и германосиликаты [6][7][8]. Вхождение в структуру кристаллов и стекол в различных соотношениях атомов Ge, Si или B, способных формировать кристаллическую решетку, позволяет получать материалы с заданными свойствами.…”