Ba(VO)As<sub>2</sub>O<sub>7</sub> – ein Vanadyl‐Diarsenat mit Schichtaufbau

Wadewitz, C.; Müller‐Buschbaum, Hk.

doi:10.1002/zaac.19976230115

Cited by 5 publications

(5 citation statements)

References 34 publications

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“…2(a), which is based on the crystallographic data obtained by the Rietveld refinement analysis, viewed along the [010] direction 24 and is isostructural with Ba 2 VP 2 O 9 containing a V 4+ ion. 25 96, which is near to the expected charge value; +2. TiO 6 octahedra are more stable than the TiO 4 tetrahedra and pyramidal or trigonal bypiramidal TiO 5 polyhedra, because the ratio of Ti 4+ and O 2− ionic radii is found to be 0.486 using Pauling's radii.…”

Section: Resultsmentioning

confidence: 69%

Rare-earth-free white emitting Ba₂TiP₂O₉ phosphor: revealing its crystal structure and photoluminescence properties

et al. 2016

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A high intensity bluish-white emitting Ba2TiP2O9 phosphor was synthesized by a conventional solid-state reaction method and the precise crystal structure was investigated for the first time by Rietveld refinement analysis. Ba2TiP2O9 has a monoclinic crystal structure with a space group C2/c (no. 15), which is built out of PO4 tetrahedra and TiO5 pyramidal polyhedra connected to form a chain structure along the c-axis. The emission of Ba2TiP2O9 is due to a charge transfer transition between Ti(4+)-O(2-) in the pyramidal TiO5. The obtained Ba2TiP2O9 was excited efficiently by UV and VUV and displayed a bright bluish-white luminescence.

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Section: Resultsmentioning

confidence: 69%

Rare-earth-free white emitting Ba₂TiP₂O₉ phosphor: revealing its crystal structure and photoluminescence properties

et al. 2016

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“…It is worth noting that kröhnkitet y p e c h a i n s w i t h c o m p o s i t i o n [VO(H 2 O)(SO 4 ) 2 ] 2À have not been observed previously. However, topologically similar chains based on VO 6 octahedra and PO 4 tetrahedra or SeO 3 trigonal pyramids have been f o u n d i n t he s t r u c t ur e s o f s y nt h e t i c Ba 2 VO(PO 4 ) 2 •H 2 O (Harrison et al, 1994), Ba 2 (VO)(PO 4 ) 2 (Wadewitz and Mü ller-Buschbaum, 1996) and K(VO)H(SeO 3 ) 2 (Kim et al, 1996). [VO(H 2 O)(SO 4 ) 2 ] 2À octahedral-tetrahedral strips in karpovite are parallel to the a axis with their planes oriented parallel to 021 and 021 ( Fig.…”

Section: Crystal Structurementioning

confidence: 99%

Unique thallium mineralization in the fumaroles of the Tolbachik volcano, Kamchatka Peninsula, Russia. II. Karpovite, Tl₂VO(SO₄)₂(H₂O)

et al. 2014

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Karpovite, ideally Tl2VO(SO4)2(H2O), was found in a fumarole of the 1st cinder cone of the North Breach of the Great Fissure Tolbachik volcano eruption (1975–1976), Kamchatka Peninsula, Russia. Karpovite occurs as bundles of white, needle-like crystals associated with shcherbinaite, pauflerite, bobjonesite, markhininite, evdokimovite and microcrystalline Mg, Al, Fe and Na sulfates. Karpovite is monoclinic, P21, a = 4.6524(4), b = 11.0757(9), c = 9.3876(7) Å , β = 98.353(2)º, V = 478.60(7) Å3, Z = 2 (from single-crystal diffraction data). The eight strongest lines of the X-ray powder diffraction pattern are (I/d/hkl): 64/4.289/012, 81/4.253/110, 38/3.683/111, 47/3.557/022, 100/3.438/1̄21, 52/2.982/013, 59/2.945/112, 54/2.354/132. The chemical composition determined by the electron microprobe analysis is (wt.%) Tl2O 61.43, VO2 11.53, SO3 23.55, H2O 2.61, total 99.12. The empirical formula (calculated on the basis of 10 O a.p.f.u.) is Tl2.00V0.96S2.03O9(H2O). The simplified formula of karpovite is Tl2VO(SO4)2(H2O), which requires Tl2O 61.93, VO2 12.09, SO3 23.34, H2O 2.62 total 100.00 wt.%. The crystal structure was solved by direct methods and refined to R1 = 0.026 for 4196 independent observed reflections. The structure contains two symmetrically independent Tl+ sites, one V4+ site and two S6+ sites. VO5H2O octahedra and SO4 tetrahedra link together by sharing corners to form kröhnkite-type stripes parallel to the a axis with their planes oriented parallel to (021) and (021̄ ). Tl+ cations are located between the chains, linked into a three-dimensional structure. The new mineral is named in honour of Professor Gennadii Alexandrovich Karpov (b. 1938), volcanologist at the Institute of Volcanology, Russian Academy of Sciences, Petropavlovsk-Kamchatskii, Kamchatka Peninsula, Russia.

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“…Für die Synthese von B a(V 0)4(A s0 4 )2(As-,07) wurden die Ausgangsstoffe BaAs90 6, As20 5 (Aidrich, 99,99%), V20 3 …”

Section: Darstellung Von Ba(v0 )4(as04)2(as207)-einkristallen Und Derunclassified

“…Be kannt sind die Verbindungen S r(V 0)2(A s04)2, B a(V 0)2(A s0 4)2[ l], ß-Sr(V 0)2(A s0 4 )2 [2] und Ba(VO)Äso07 [3]. In den isotypen Stoffen Sr(V 0)2(A s0 4)2 und B a(V 0)2(A s0 4 )2 ist V4+ gestreckt oktaedrisch koordiniert.…”

Section: Introductionunclassified

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Ba(VO)₄(AsO₄)₂(As₂O₇): Ein neues Divanadyl(IV)-Arsenat mit flächenverknüpften V₂O₈₊₁-Oktaederdoppeln / Ba(VO)₄ (AsO₄)₂ (As₂O₇): A New Divanadyl(IV)-Arsenate Containing Face Shared V₂O₈₊, Double Octahedra

Wadewitz¹,

Müller‐Buschbaum²

1997

Zeitschrift Für Naturforschung B

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A new alkaline earth vanadyl arsenate Ba(VO)4(AsO4)2(As2O7) has been synthesized by solid state reactions in closed quartz tubes. X-ray investigations led to orthorhombic symmetry, space group D162h-Pnma, α = 17.540(2), b = 7.6223(8), c = 11.0633(12) Å, Z = 4. The crystal structure is characterized by AsO4 single and As2O7 double tetrahedra and face shared asymmetric stretched V2O8+1, double octahedra, forming a network of polyhedra. The incorporated Ba2+ ions show 12-fold coordination by oxygen. Ba(VO)4(AsO4)2(As2O7) is the first vanadyl compound containing V2O8 divanadyl groups originating from face sharing stretched VO5+1 octahedra

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Ba(VO)As₂O₇ – ein Vanadyl‐Diarsenat mit Schichtaufbau

Cited by 5 publications

References 34 publications

Rare-earth-free white emitting Ba₂TiP₂O₉ phosphor: revealing its crystal structure and photoluminescence properties

Rare-earth-free white emitting Ba₂TiP₂O₉ phosphor: revealing its crystal structure and photoluminescence properties

Unique thallium mineralization in the fumaroles of the Tolbachik volcano, Kamchatka Peninsula, Russia. II. Karpovite, Tl₂VO(SO₄)₂(H₂O)

Ba(VO)₄(AsO₄)₂(As₂O₇): Ein neues Divanadyl(IV)-Arsenat mit flächenverknüpften V₂O₈₊₁-Oktaederdoppeln / Ba(VO)₄ (AsO₄)₂ (As₂O₇): A New Divanadyl(IV)-Arsenate Containing Face Shared V₂O₈₊, Double Octahedra

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Ba(VO)As2O7 – ein Vanadyl‐Diarsenat mit Schichtaufbau

Cited by 5 publications

References 34 publications

Rare-earth-free white emitting Ba2TiP2O9 phosphor: revealing its crystal structure and photoluminescence properties

Rare-earth-free white emitting Ba2TiP2O9 phosphor: revealing its crystal structure and photoluminescence properties

Unique thallium mineralization in the fumaroles of the Tolbachik volcano, Kamchatka Peninsula, Russia. II. Karpovite, Tl2VO(SO4)2(H2O)

Ba(VO)4(AsO4)2(As2O7): Ein neues Divanadyl(IV)-Arsenat mit flächenverknüpften V2O8+1-Oktaederdoppeln / Ba(VO)4 (AsO4)2 (As2O7): A New Divanadyl(IV)-Arsenate Containing Face Shared V2O8+, Double Octahedra

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Ba(VO)As₂O₇ – ein Vanadyl‐Diarsenat mit Schichtaufbau

Rare-earth-free white emitting Ba₂TiP₂O₉ phosphor: revealing its crystal structure and photoluminescence properties

Rare-earth-free white emitting Ba₂TiP₂O₉ phosphor: revealing its crystal structure and photoluminescence properties

Unique thallium mineralization in the fumaroles of the Tolbachik volcano, Kamchatka Peninsula, Russia. II. Karpovite, Tl₂VO(SO₄)₂(H₂O)

Ba(VO)₄(AsO₄)₂(As₂O₇): Ein neues Divanadyl(IV)-Arsenat mit flächenverknüpften V₂O₈₊₁-Oktaederdoppeln / Ba(VO)₄ (AsO₄)₂ (As₂O₇): A New Divanadyl(IV)-Arsenate Containing Face Shared V₂O₈₊, Double Octahedra