High-pressure Synthesis and Characterization of the Fluoride Borate Tm5(BO3)2F9

Haberer, Almut; Enders, Michael; Kaindl, Reinhard; Huppertz, Hubert

doi:10.1515/znb-2010-1006

Cited by 10 publications

(5 citation statements)

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“…range of 3000 to 3600 cm −1 . Sample preparation outside the glove box led to O-H bands as described for RE 5 (BO 3 ) 2 F 9 (RE = Er, Tm) [9,10]. A substitution of fluoride by hydroxyl groups can be assumed.…”

Section: Vibrational Spectroscopymentioning

confidence: 99%

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High-pressure Syntheses and Characterization of the Rare Earth Borates RE5(BO₃)₂F₉ (RE=Dy, Ho)

Hinteregger¹,

Gerhard²,

Hofer³

et al. 2013

Zeitschrift Für Naturforschung B

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The new rare earth fluoride borates RE 5 (BO 3) 2 F 9 (RE = Ho, Dy) were synthesized under highpressure/high-temperature conditions of 1.5 GPa, 1250 • C for Dy 5 (BO 3) 2 F 9 and 2.5 GPa, 1200 • C for Ho 5 (BO 3) 2 F 9 in a Walker-type multianvil apparatus from the corresponding rare earth oxides, rare earth fluorides, and boron oxide. The single-crystal structure determinations have revealed that both compounds are isotypic to the known rare earth fluoride borates RE 5 (BO 3) 2 F 9 (RE = Er, Tm, Yb). The new fluoride borates crystallize monoclinically in the space group C2/c (Z = 4) with the lattice parameters a = 2046.7(4), b = 615.9(2), c = 829.6(2) pm, β = 100.1(1) • for Dy 5 (BO 3) 2 F 9 and a = 2039.5(4), b = 612.7(2), c = 827.1(2) pm, β = 100.2(1) • for Ho 5 (BO 3) 2 F 9. Three crystallographically different nine-fold coordinated rare earth cations can be identified in the crystal structure. All boron atoms build up isolated trigonal-planar [BO 3 ] 3− groups. In addition to the Raman and IR spectroscopic investigations, DFT-calculations were performed to support the assignment of the vibrational bands.

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Section: Vibrational Spectroscopymentioning

confidence: 99%

“…500 cm −1 can be interpreted by Dy-O / Dy-F bond bending and stretching as well as lattice vibrations. Modes above 1100 and around 900 and 500 cm −1 can be assigned to vibrations of [BO 3 ] 3− groups [9,10].…”

Section: Vibrational Spectroscopymentioning

confidence: 99%

High-pressure Syntheses and Characterization of the Rare Earth Borates RE5(BO₃)₂F₉ (RE=Dy, Ho)

Hinteregger¹,

Gerhard²,

Hofer³

et al. 2013

Zeitschrift Für Naturforschung B

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“…8) starting from stoichiometric mixtures of RE 2 O 3 , REF 3 , and B 2 O 3 . [80][81][82] These rare-earth fluoride borates exclusively consist of isolated trigonal BO 3 groups, rare-earth cations, and fluoride anions, closely related to the compounds RE 3 (BO 3 ) 2 F 3 (RE = Sm, Eu, Gd) 83,84 and Gd 2 (BO 3 )F 3 . 85 In fact, all three structure types can be described by different sequences of layers with the formal composition ''REBO 3 '' and ''REF 3 ''.…”

Section: Fluoride Boratesmentioning

confidence: 99%

New synthetic discoveries via high-pressure solid-state chemistry

Huppertz

2011

Chem. Commun.

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Most of the syntheses in solid-state chemistry are performed at constant pressure of ∼1 atm (about 10(5) Pa) by the manipulation of the thermodynamic parameters temperature and composition, leading to a rich variety of compounds. In contrast, the additional variation of pressure has remained virtually unexplored, due to the relatively large costs of maintaining high-pressure conditions and the inevitably tiny sample volumes. In the last two decades, technical advances, developed for studying the properties of minerals, have found access into the preparative solid-state chemistry, opening up tremendously large areas to synthesize new materials.

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“…However, there have been only 33 cases of reported anhydrous rare-earth borate fluorides so far. It is important to note that many rare-earth borate fluorides, such as LnB 2 O 4 F (Ln = La, Ce), a series of RE 4 B 4 O 11 F 2 and RE 5 (BO 3 ) 2 F 9 compounds, are synthesized under conditions of high temperature and high pressure. – This is because the high reaction temperature of rare-earth oxides makes it difficult to react fully at normal pressure and maintain the existence of F simultaneously. Therefore, considering that alkali metal fluorides can be used as fluorine sources and have relatively low melting points, we intend to lower the reaction temperature of the system by choosing appropriate alkali metal fluorides as the reactants and fluxes.…”

Section: Introductionmentioning

confidence: 99%

Rare-Earth Scandium Borate Fluoride with a Deep-Ultraviolet Cutoff Edge

Zhang,

An,

Tudi

et al. 2023

Inorg. Chem.

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Through reasonable selections of raw materials and experimental methods, a new rare-earth borate fluoride K 11 Sc 5 (B 5 O 10 ) 4 F 6 is synthesized successfully by the high-temperature solution method in a closed system, which is the first noncentrosymmetric scandium borate fluoride. It crystallizes in the Fdd2 space group of the orthorhombic crystal system and features an extremely complicated structure constructed by the fundamental building blocks [B 5 O 10 ] units, Sc-based, and K-based polyhedra. To our knowledge, K 11 Sc 5 (B 5 O 10 ) 4 F 6 is the only rare-earth borate that contains two kinds of [B 5 O 10 ] groups and crystallizes in the Fdd2 space group, enriching the structural chemistry of rare-earth borates and rare-earth borate fluorides. Additionally, it is discussed in detail how F can significantly improve performance by modifying the modules in a comparison of structures. Discussion on rational synthetic conditions is instructive for obtaining rare-earth borate fluorides. Furthermore, a short cutoff edge (<190 nm) is experimentally confirmed, indicating the potential application of K 11 Sc 5 (B 5 O 10 ) 4 F 6 in ultraviolet/deep-ultraviolet regions.

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High-pressure Synthesis and Characterization of the Fluoride Borate Tm₅(BO₃)₂F₉

Cited by 10 publications

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High-pressure Syntheses and Characterization of the Rare Earth Borates RE5(BO₃)₂F₉ (RE=Dy, Ho)

High-pressure Syntheses and Characterization of the Rare Earth Borates RE5(BO₃)₂F₉ (RE=Dy, Ho)

New synthetic discoveries via high-pressure solid-state chemistry

Rare-Earth Scandium Borate Fluoride with a Deep-Ultraviolet Cutoff Edge

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High-pressure Synthesis and Characterization of the Fluoride Borate Tm5(BO3)2F9

Cited by 10 publications

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High-pressure Syntheses and Characterization of the Rare Earth Borates RE5(BO3)2F9 (RE=Dy, Ho)

High-pressure Syntheses and Characterization of the Rare Earth Borates RE5(BO3)2F9 (RE=Dy, Ho)

New synthetic discoveries via high-pressure solid-state chemistry

Rare-Earth Scandium Borate Fluoride with a Deep-Ultraviolet Cutoff Edge

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High-pressure Synthesis and Characterization of the Fluoride Borate Tm₅(BO₃)₂F₉

High-pressure Syntheses and Characterization of the Rare Earth Borates RE5(BO₃)₂F₉ (RE=Dy, Ho)

High-pressure Syntheses and Characterization of the Rare Earth Borates RE5(BO₃)₂F₉ (RE=Dy, Ho)