Transformation of the crystal structure in the series of K1 − x Cs x BSi2O6 borosilicate solid solutions

NaCa5BO3(SiO4)2 with Interesting Isolated [BO3] and [SiO4] Units in Alkali- and Alkaline-Earth-Metal Borosilicates

“…(2) In SrB 2 Si 2 O 8 , Ba­(B 2 Si 2 O 8 ), and CaB 2 Si 2 O 8 , the anionic groups comprise isolated [Si 2 O 7 ] and [B 2 O 7 ] dimers which are formed by two [SiO 4 ] and [BO 4 ] groups via corner sharing, respectively. (3) In CsBSi 2 O 6 , and Ba 2 Ca­(BSi 2 O 7 ) 2 , , isolated [Si 4 O 12 ] rings are formed by four corner-sharing [SiO 4 ] tetrahedra. However, the B–O groups are different.…”

“…The former contains isolated [BO 4 ] tetrahedra, and the latter comprises [B 4 O 12 ] rings built by four corner-sharing [BO 4 ] tetrahedra. (4) There are [Si 2 O 6 ] chains, [Si 4 O 12 ] chains, and [Si 6 O 16 ] chains in Li 4 B 4 Si 8 O 24 , KBSi 2 O 6 , ,, and NaBSi 3 O 8 ; , they all contain isolated [BO 4 ] groups as in KNa 2 B 3 Si 12 O 30 . Differently, KNa 2 B 3 Si 12 O 30 contains isolated [Si 12 O 30 ] clusters which are constructed by 12 [SiO 4 ] tetrahedra.…”

CsSiB3O7: A Beryllium-Free Deep-Ultraviolet Nonlinear Optical Material Discovered by the Combination of Electron Diffraction and First-Principles Calculations

“…At the beginning, six random compositions in the boron-rich region of Cs–Si–B–O system were selected (Table S1), and polycrystalline samples were prepared by typical high temperature solid state reaction. Other than two known compounds, Cs 2 SiB 4 O 9 and CsSi 2 BO 6 , there are some small unidentified peaks in PXRD data for one of the six samples (Figure S1). The first idea is to check the possible isomorphism to other alkali metal borogermanates (Figure S2), such as CsGeB 3 O 7 , Rb 4 Ge 3 B 6 O 17 and K 2 Ge 3 B 2 O 10 . , However, there is no clear correlation between them, suggesting a new borosilicate was obtained as an impurity in our study.…”