New fluoride borate with ‘anti-zeolite’ structure: A possible link to Ba3(BO3)2

Rashchenko, Sergey V.; Bekker, Tatyana B.; Bakakin, V. V.; Seryotkin, Yurii V.; Simonova, Ekaterina A.; Goryaĭnov, S. V.

doi:10.1016/j.jallcom.2016.10.119

Cited by 15 publications

(16 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Details of the data collection and structure refinement are summarized in Table . The solved structure corresponds to that reported for Ba 3 (BO 3 ) 2– x F 3 x solid solution with the exception of absent fluorine atoms, and therefore may be regarded as a fluorine‐free end‐member of Ba 3 (BO 3 ) 2– x F 3 x .…”

Section: Resultssupporting

confidence: 69%

“…We assumed that the Ba 3 B 2 O 6 compound might be the end member of Ba 3 (BO 3 ) 2– x F 3 x ( Pbam ) solid solution described in , the structure of which corresponds to a new class of borates with the positively charged cation pattern [Ba 12 (BO 3 ) 6 ] 6+ and channels with variable and highly disordered (BO 3 ) 3− and F − “guest” anions in them. It was found that the ability of the [Ba 12 (BO 3 ) 6 ] 6+ cationic pattern to accommodate intrachannel assemblages is not limited by the (BO 3 ) 3− versus F − variations.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

BaO−B₂O₃ system and its mysterious member Ba₃B₂O₆

et al. 2017

Self Cite

View full text Add to dashboard Cite

The first systematic study of the BaO-B 2 O 3 system and barium orthoborate Ba 3 B 2 O 6 (3BaOÁB 2 O 3 ) was reported in 1949. Thereafter, the system was repeatedly refined but the structure of Ba 3 B 2 O 6 compound has not been adequately studied yet. In our study we have, for the first time, obtained the crystalline samples of Ba 3 B 2 O 6 . The solved structure (Pbam, a = 13.5923(4) A, b = 13.6702 The studies of BaO-B 2 O 3 system are complicated by the high reactivity and hygroscopicity of melts. High viscosity of the melts and their tendency for undercooling, glass formation and appearance of metastable equilibriums present a particular problem.Barium oxide BaO melts at 1923°C. The compound crystallizes in a cubic crystal system with the rock salt structure. Boric oxide B 2 O 3 is extremely hydroscopic and is very difficult to crystallize, its melting temperature is 450°C. The structures of two polymorphous modifications of boric oxideÀB 2 O 3 (I) (P3 1 21) 4 and B 2 O 3 (II) (Ccm2 1 ) 5 Àwere studied with adequate accuracy.For the first time, the BaO-B 2 O 3 system was systematically studied by Levin & McMurdie (1949) 6 with the use of annealing and quenching procedures, X-ray powder diffraction and thermal analysis. The middle part of the phase diagram was repeatedly studied by H€ ubner (1969). 8 In addition to the above-listed compounds, three new compounds were established: 2BaOÁ5B 2 O 3 , "2BaOÁB 2 O 3 " and 4BaOÁB 2 O 3 . It should be emphasized that the right stoichiometry assigned to "2BaOÁB 2 O 3 " is 2.5BaOÁB 2 O 3 , which was convincingly shown in.

show abstract

Section: Resultssupporting

confidence: 69%

Section: Methodsmentioning

confidence: 99%

BaO−B₂O₃ system and its mysterious member Ba₃B₂O₆

et al. 2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…The topology of Ba 3 (BO 3 ) 2– x F 3 x :Cu structure is identical to that reported for orthorhombic Ba 3 (BO 3 ) 2– x F 3 x antizeolite solid solution and closely related to tetragonal antizeolites with guest cations (Li, Na, Mn). , The structure was solved and refined in Pbam space group with the following lattice metrics: a = 13.4355(5) Å; b = 13.8153(6) Å; c = 14.8812(6) Å. A specific feature of Ba 3 (BO 3 ) 2– x F 3 x :Cu is a small a : b ratio of 0.973, which is remarkably smaller than the respective values 0.994–0.996 and 1.000 for Ba 3 (BO 3 ) 2– x F 3 x and tetragonal antizeolites solid solutions.…”

Section: Resultssupporting

confidence: 63%

“…Crystals of Ba 3 (BO 3 ) 2– x F 3 x :Cu were grown on platinum wire loop from the same composition as we used for Ba 3 (BO 3 ) 2– x F 3 x crystal growth: 50 mol % BaO–33 mol % BaB 2 O 4 –BaF 2 but with the addition of 3.10 wt % of CuO. The batch (40 g) was melted in a platinum crucible (40 mm in diameter).…”

Section: Experimental Proceduresmentioning

confidence: 99%

“…A new class of fluoride borates allowing application of structure-oriented design strategy has been recently discovered. − These fluoride borates are built with positively charged [Ba 12 (BO 3 ) 6 ] 6+ open framework (hence called as “antizeolitic”) and exhibit the ABAB stacking pattern, as shown in Figure a. The A-layer is built of porous [Ba 12 (BO 3 ) 6 ] 6+ framework, hosting (BO 3 ) 3– or [2F] 2– guest groups.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Optical and Magnetic Properties of Cu-Containing Borates with “Antizeolite” Structure

et al. 2019

Self Cite

View full text Add to dashboard Cite

Crystals of copper-doped barium fluoride borate solid solutions Ba 3 (BO 3 ) 2−x F 3x :Cu were grown from hightemperature solution. Using X-ray single-crystal diffraction, the structure was solved and refined in Pbam space group. These crystals are colored in brown, revealing linear dichroism. Optical and electron spin resonance spectroscopic investigations concluded that the light absorption of Ba 3 (BO 3 ) 2−x F 3x :Cu crystals is caused by both the exciton and f ree charge carriers. This phenomenon is similar to those observed in other colored "antizeolites" built with the positively charged framework of porous [Ba 12 (BO 3 ) 6 ] 6+ building blocks (hence named as antizeolites). The coloring of Ba 3 (BO 3 ) 2−x F 3x :Cu crystals is associated with the absorption of Cu 2+ ions as well. For the first time, constants of the hyperfine interaction of copper ions Cu 2+ in octahedral fluorine surroundings [CuF 6 ] 4− have been determined.

show abstract