Hydrothermal synthesis of single crystals of transition metal vanadates in the glaserite phase

Sanjeewa, Liurukara D.; McMillen, Colin D.; Willett, Daniel; Chumanov, George; Kolis, Joseph W.

doi:10.1016/j.jssc.2015.07.039

Cited by 24 publications

(36 citation statements)

References 32 publications

(34 reference statements)

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“…In fact, there are still many unknown physical characteristics related to it as well as its Raman spectrum. It belongs to a wide class of structures known as glaserite phases, which compounds have been more deeply studied than the specific K 3 Na(SO 4 ) 2 . The first problem detected is related to its common name, because there are two possible terms: aphthitalite and glaserite.…”

Section: Introductionmentioning

confidence: 99%

The Raman spectra of the Na₂SO₄‐K₂SO₄ system: Applicability to soluble salts studies in built heritage

Prieto‐Taboada

Vallejuelo

Veneranda

et al. 2018

J Raman Spectroscopy

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The Raman spectra of the Na 2 SO 4 -K 2 SO 4 -H 2 O system are not well-defined in the literature. Specifically, the proper identification of sodium and potassium sulphate (aphthitalite or glaserite, K 3 Na(SO 4 ) 2 ) and anhydrous sodium sulphate (thenardite, Na 2 SO 4 ) is particularly problematic because their vibrational profiles present the same main Raman peak at 993 cm −1 and very similar low frequency bands. As proved in bibliography, the similarity of their spectra can often lead to uncertain or erroneous identifications. Considering that aphthitalite and thenardite can be found as degradation products on built heritage materials and the degree of danger associated to them is not the same, being the second one the most harmful, the resolution of this problem has a critical importance. For this reason, in the present work, the Raman spectra of aphthitalite and thenardite are deeply studied to identify the vibrational fingerprints enabling their correct identification. The results here summarized and provided by two different Raman instruments highlight that the spectrum of aphthitalite displays characteristic bands at 1,084 and 1,202 cm −1 . In contrast, the bands at 1,100, 1,129, and 1,152 cm −1 seem to be characteristic of thenardite. Furthermore, when those secondary bands are not observed or mixtures of both compounds are present, the ratio between their most intense bands at 452 and 993 cm −1 is the key for their correct characterization. On the whole, this study fills the gaps observed in literature and gives the solution for the correct identification of aphthitalite and thenardite even when secondary bands are not observed.

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Section: Introductionmentioning

confidence: 99%

The Raman spectra of the Na₂SO₄‐K₂SO₄ system: Applicability to soluble salts studies in built heritage

Prieto‐Taboada

Vallejuelo

Veneranda

et al. 2018

J Raman Spectroscopy

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“…[1][2][3][4] Recently we have been investigating tetrahedral vanadate, [VO 4 ] 3-, as an oxyanion building block in hydrothermal conditions, and found that it displays an extremely rich coordination chemistry as a structural unit for both rare earths [5] as well as d-block metal ions. [6][7][8] Vanadates are intriguing building blocks in that they are isostructural to the phosphates, which of course display an exceptionally rich and diverse coordination chemistry. However, the exploratory structural chemistry of the vanadates is not yet as fully developed as the corresponding phosphates.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of new fluoride-containing manganese vanadates A2Mn2V2O7F2 (A=Rb, Cs) and Mn2VO4F

Sanjeewa

McGuire

Pellizzeri

et al. 2016

Journal of Solid State Chemistry

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Large single crystals of A 2 Mn 2 V 2 O 7 F 2 (A = Rb, Cs) and Mn 2 VO 4 F were grown using a hightemperature (~600˚C) hydrothermal technique. Single crystal X-ray diffraction and powder Xray diffraction were utilized to characterize the structures, which both possess MnO 4 F 2 building blocks. The A 2 Mn 2 V 2 O 7 F 2 series crystallizes as a new structure type in space group Pbcn (no. 60), Z = 4 (Rb 2 Mn 2 V 2 O 7 F 2 : a = 7.4389(17) Å, b = 11.574(3) Å, c = 10.914(2) Å; Cs 2 Mn 2 V 2 O 7 F 2 : a = 7.5615(15) Å, b = 11.745(2) Å, c = 11.127(2) Å). The structure is composed of zigzag chains of edge-sharing MnO 4 F 2 units running along the a-axis, and interconnected through V 2 O 7 pyrovanadate groups. Temperature dependent magnetic susceptibility measurements on this interesting one-dimensional structural feature based on Mn 2+ indicated that Cs 2 Mn 2 V 2 O 7 F 2 is antiferromagnetic with a Neél temperature, T N = ~ 3 K a Weiss constant, θ, of-11.7(1) K. Raman and infrared spectra were also analyzed to identify the fundamental V-O vibrational modes in Cs 2 Mn 2 V 2 O 7 F 2. Mn 2 (VO 4)F crystalizes in the monoclinic space group of C2/c (no. 15), Z = 8 with unit cell parameters of a = 13.559(2) Å, b = 6.8036(7) Å, c = 10.1408(13) Å and β = 116.16(3)°. The structure is associated with those of triplite and wagnerite. Dynamic fluorine disorder gives rise to complex alternating chains of five-and sixcoordinate Mn 2+. These interpenetrating chains are additionally connected through isolated VO 4 tetrahedra to form the condensed structure.

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“…These materials are generally synthesized at relatively high temperatures using traditional solid‐state techniques, such as melts or fluxes , . Alternatively, our group found that high temperature (500–700 °C) hydrothermal synthesis leads to a wide range of unusual new transition metal vanadates, often in the form of large, high‐quality single crystals , . In addition to their new structure types, many of these materials have interesting magnetic properties.…”

Section: Introductionmentioning

confidence: 99%

Sodium Transition Metal Vanadates from Hydrothermal Brines: Synthesis and Characterization of NaMn₄(VO₄)₃, Na₂Mn₃(VO₄)₃, and Na₂Co₃(VO₄)₂(OH)₂

et al. 2020

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Three new examples of transition metal vanadates have all been synthesized by a related hydrothermal synthetic route using variations of sodium hydroxide/sodium chloride brines as mineralizers. Compound 1, NaMn4(VO4)3, is built from equivalent interlocking chains of Mn2+ edge shared octahedra, further coordinated to one another by (VO4)3– vanadate groups to form a three‐dimensional structure. Compound 2, Na2Mn3(VO4)3, forms a complex three‐dimensional structure of mixed‐valence 2+/3+ manganese edge‐sharing octahedra forming chains, with (VO4)3– tetrahedra acting as space‐fillers in the structure. Structure 3, Na2Co3(VO4)2(OH)2, is built of a two‐dimensional distorted honeycomb of edge shared Co2+ layers decorated by, but not connected by, vanadate groups. The layers bear a relationship to Kagome nets but the structure contains no ideal trigonal symmetry. All compounds were characterized by single‐crystal X‐ray diffraction. Compounds 1 and 3 were characterized by magnetic susceptibility. The magnetic susceptibility of 1 displays the moment characteristic of Mn2+ and a transition at 46 K to a spin canted antiferromagnet. Compound 3 shows evidence of spin–orbit coupling in the Co2+ ions with antiferromagnetic ordering at 4.4.K and highly anisotropic field‐dependent behavior with multiple metamagnetic transitions.

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Hydrothermal synthesis of single crystals of transition metal vanadates in the glaserite phase

Cited by 24 publications

References 32 publications

The Raman spectra of the Na₂SO₄‐K₂SO₄ system: Applicability to soluble salts studies in built heritage

The Raman spectra of the Na₂SO₄‐K₂SO₄ system: Applicability to soluble salts studies in built heritage

Synthesis and characterization of new fluoride-containing manganese vanadates A2Mn2V2O7F2 (A=Rb, Cs) and Mn2VO4F

Sodium Transition Metal Vanadates from Hydrothermal Brines: Synthesis and Characterization of NaMn₄(VO₄)₃, Na₂Mn₃(VO₄)₃, and Na₂Co₃(VO₄)₂(OH)₂

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Hydrothermal synthesis of single crystals of transition metal vanadates in the glaserite phase

Cited by 24 publications

References 32 publications

The Raman spectra of the Na2SO4‐K2SO4 system: Applicability to soluble salts studies in built heritage

The Raman spectra of the Na2SO4‐K2SO4 system: Applicability to soluble salts studies in built heritage

Synthesis and characterization of new fluoride-containing manganese vanadates A2Mn2V2O7F2 (A=Rb, Cs) and Mn2VO4F

Sodium Transition Metal Vanadates from Hydrothermal Brines: Synthesis and Characterization of NaMn4(VO4)3, Na2Mn3(VO4)3, and Na2Co3(VO4)2(OH)2

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The Raman spectra of the Na₂SO₄‐K₂SO₄ system: Applicability to soluble salts studies in built heritage

The Raman spectra of the Na₂SO₄‐K₂SO₄ system: Applicability to soluble salts studies in built heritage

Sodium Transition Metal Vanadates from Hydrothermal Brines: Synthesis and Characterization of NaMn₄(VO₄)₃, Na₂Mn₃(VO₄)₃, and Na₂Co₃(VO₄)₂(OH)₂