Crystal chemistry, Rietveld refinements and Raman spectroscopy studies of the new solid solution series: Ba3−xSrx(VO4)2 (0≤x≤3)

Azdouz, M.; Manoun, Bouchaib; Essehli, Rachid; Azrour, M.; Bih, L.; Benmokhtar, S.; Hou, A. Aït; Lazor, Peter

doi:10.1016/j.jallcom.2010.03.066

“…There are many reports of divalent metal vanadates synthesized by high-temperature solid-state reactions (Chen et al, 2004;Azdouz et al, 2010;Huang et al, 2012, and references therein). Hydrothermal methods have also proved to be effective for the synthesis of new vanadium compounds Ðordević et al, 2008, and references therein).…”

Section: Commentmentioning

confidence: 99%

Ba[Co₃(VO₄)₂(OH)₂] with a regular Kagomé lattice

Đorđević

¹

,

Karanović

²

2013

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The new layered title compound, barium di-μ-hydroxido-di-μ-vanadato-tricobaltate(II), was prepared under low-temperature hydrothermal conditions. Its crystal structure comprises Co(2+) and O(2-) ions in the Kagomé geometry. The octahedral Co(3)O(6)(OH)(2) Kagomé layers, made up of edge-shared CoO(4)(OH)(2) octahedra with Co on a site of 2/m symmetry, alternate along the c axis with barium vanadate heteropolyhedral layers, in which Ba is on a site of 3m symmetry and V is on a site of 3m symmetry. All three O atoms and the H atom also occupy special positions: two O atoms and the H atom are on sites with 3m symmetry and one O atom is on a site with m symmetry. Ba[Co(3)(VO(4))(2)(OH)(2)] represents the first compound from the four-component BaO-CoO-V(2)O(5)-H(2)O system and its structure is topologically related to the minerals vesignieite, Ba[Cu(3)(VO(4))(2)(OH)(2)], and bayldonite, Pb[Cu(3)(AsO(4))(2)(OH)(2)].

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“…(Kraus and Nolze, 1996).The strongest lines are given in bold. Grzechnik and McMillan, 1997;Zhuravlev et al, 2008;Azdouz et al, 2010). The gurimite structure (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…The EBSD pattern for gurimite was obtained at working distances of 150 mm and 177 mm. Fitting of the EBSD pattern at 150 mm to a Ba 3 (VO 4 ) 2 model (Susse and Buerger, 1970;Azdouz et al, 2010) with the cell parameters R3m, a = 5.784(1), c = 21.132(1) Å, V = 612.2(2) Å 3 , Z = 3 resulted in a mean angular deviation (MAD) = 0.43°(good fit).…”

Section: Electron Back-scattered Diffractionmentioning

confidence: 99%

“…Because hexacelsian and gurimite only occur in small concentrations, powder X-ray diffraction (PXRD) data could not be collected. The more reliable PXRD patterns were calculated based on the results of single-crystal structure refinements of the synthetic analogues (Tables 2, 3; Susse and Buerger, 1970;Azdouz et al, 2010;Kremenovicé t al., 2003).…”

Section: Electron Back-scattered Diffractionmentioning

confidence: 99%

“…Gurimite and hexacelsian have synthetic analogues. Synthetic barium orthovanadate, Ba 3 (VO 4 ) 2 is a potential matrix for phosphorus, it exhibits intense rare-earth activated luminescence and can be used in television tubes, luminescent lamp coatings and solid-state lasers (Susse and Buerger, 1970;Azdouz et al, 2010). Until recently the only known Ba minerals in the feldspar group were celsian and paracelsian (Black, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Gurimite, Ba₃(VO₄)₂ and hexacelsian, BaAl₂Si₂O₈ – two new minerals from schorlomite-rich paralava of the Hatrurim Complex, Negev Desert, Israel

Galuskina

¹

,

Galuskin

²

,

Vapnik

³

et al. 2017

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Two new barium-bearing minerals: gurimite, Ba3(VO4)2 (IMA2013-032) and hexacelsian, BaAl2Si2O8 (IMA2015-045) were discovered in veins of paralava cutting gehlenite-flamite hornfels located in the Gurim Anticline in the Negev Desert, Israel. Gurimite and hexacelsian occur in oval polymineralic inclusions in paralava and are associated with gehlenite, pseudowollastonite or wollastonite, rankinite, flamite, larnite, schorlomite, andradite, fluorapatite, fluorellestadite, kalsilite, cuspidine, aradite, zadovite and khesinite. Gurimite and hexacelsian form elongate crystals <10 μm thick. The minerals are colourless and transparent with a white streak and vitreous lustre, and have (0001) cleavage, respectively good in gurimite and very good in hexacelsian. Fracture is irregular. Density calculated using empirical formulas gave 5.044 g cm–3 for gurimite and 3.305 g cm–3 for hexacelsian. Mean refractive indexes, 1.945 and 1.561, respectively, were also calculated using the empirical formulas and the Gladstone-Dale relationship. The minerals are uniaxial and nonpleochroic. The following empirical crystal chemical formulae were assigned to holotype gurimite: (Ba2.794K0.092Ca0.084Na0.033Sr0.017)∑3.020(V1.8275+S0.0916+P0.0515+Al0.040Si0.005Fe0.0053+)∑2.017O8,and holotype hexacelsian: (Ba0.911K0.059Ca0.042Na0.010)∑1.022Al1.891Fe0.0723+Si2.034O8. The Raman spectrum of hexacelsian is similar to the one of the synthetic disordered β-BaAl2Si2O8. The Raman spectrum of gurimite is identical to that of synthetic Ba3(VO4)2. The electron back-scattered diffraction (EBSD) pattern of gurimite was fitted to the structure of its synthetic analogue with the cell parameters of R3m, a = 5.784(1),c = 21.132(1) Å, V = 612.2(2) Å3, Z = 3, giving a mean angular deviation = 0.43° (good fit). The Raman spectra of hexacelsian and its EBSD pattern suggest that natural hexacelsian corresponds to disordered synthetic β-hexacelsian P63/mcm, a = 5.2920(4) Å, c = 15.557(2) Å, α = β = 90°, γ = 120°. We suggest that after relatively fast crystallization of the main constituents of the paralava, gurimite, hexacelsian and also other Ba-bearing phases crystallized from residual melt enriched in incompatible elements that filled interstices between crystals of the main constituents.

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ChemInform Abstract: Crystal Chemistry, Rietveld Refinements and Raman Spectroscopy Studies of the New Solid Solution Series: Ba_3‐xSr_x(VO₄)₂ (0 ≤ x ≤ 3).

Azdouz¹,

Manoun²,

Essehli³

et al. 2010

ChemInform

0

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Crystal chemistry, Rietveld refinements and Raman spectroscopy studies of the new solid solution series: Ba3−xSrx(VO4)2 (0≤x≤3)

Cited by 25 publications

References 14 publications

Ba[Co₃(VO₄)₂(OH)₂] with a regular Kagomé lattice

Ba[Co₃(VO₄)₂(OH)₂] with a regular Kagomé lattice

Gurimite, Ba₃(VO₄)₂ and hexacelsian, BaAl₂Si₂O₈ – two new minerals from schorlomite-rich paralava of the Hatrurim Complex, Negev Desert, Israel

ChemInform Abstract: Crystal Chemistry, Rietveld Refinements and Raman Spectroscopy Studies of the New Solid Solution Series: Ba_3‐xSr_x(VO₄)₂ (0 ≤ x ≤ 3).

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Crystal chemistry, Rietveld refinements and Raman spectroscopy studies of the new solid solution series: Ba3−xSrx(VO4)2 (0≤x≤3)

Cited by 25 publications

References 14 publications

Ba[Co3(VO4)2(OH)2] with a regular Kagomé lattice

Ba[Co3(VO4)2(OH)2] with a regular Kagomé lattice

Gurimite, Ba3(VO4)2 and hexacelsian, BaAl2Si2O8 – two new minerals from schorlomite-rich paralava of the Hatrurim Complex, Negev Desert, Israel

ChemInform Abstract: Crystal Chemistry, Rietveld Refinements and Raman Spectroscopy Studies of the New Solid Solution Series: Ba3‐xSrx(VO4)2 (0 ≤ x ≤ 3).

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Product

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Ba[Co₃(VO₄)₂(OH)₂] with a regular Kagomé lattice

Ba[Co₃(VO₄)₂(OH)₂] with a regular Kagomé lattice

Gurimite, Ba₃(VO₄)₂ and hexacelsian, BaAl₂Si₂O₈ – two new minerals from schorlomite-rich paralava of the Hatrurim Complex, Negev Desert, Israel

ChemInform Abstract: Crystal Chemistry, Rietveld Refinements and Raman Spectroscopy Studies of the New Solid Solution Series: Ba_3‐xSr_x(VO₄)₂ (0 ≤ x ≤ 3).