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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Đorđević, Tamara
TU Wien
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (18/18 displayed)
- 2023Tl(I) sequestration by pharmacosiderite supergroup arsenatescitations
- 2022Temperature-Induced Phase Transition in a Feldspar-Related Compound BaZn2As2O8∙H2Ocitations
- 2021Water in the Alluaudite Type-Compounds
- 2021An update on the mineral-like Sr-containing transition metal arsenatescitations
- 2020Synthesis, crystal structure and biological activity of copper(II) complex with 4-nitro-3-pyrazolecarboxylic ligandcitations
- 2017Hydrothermal and ionothermal synthesis of mineral-related arsenates in the system CdO-MO-As2O5 (M2+ = Mg, Co, Ni, Cu, Zn) and their crystal structurescitations
- 2016A single-crystal X-ray and Raman spectroscopic study of hydrothermally synthesized arsenates and vanadates with the descloizite and adelite structure typescitations
- 2015Three new alluaudite-like protonated arsenates: NaMg3(AsO4)(AsO3OH)2, NaZn3(AsO4)(AsO3OH)2 and Na(Na0.6Zn0.4)Zn2(H0.6AsO4)(AsO3OH)2citations
- 2014A new anion-deficient fluorite-related super structure of Bi28V8O62citations
- 2011Ba(ZnAsO4)2xH2O, a non-centrosymmetric framework structure related to feldspar
- 2011Two new zincophosphates, (H3NCH2CH2NH3)2[Zn(µ-PO4)2] and (NH4)[(H3N)Zn{(µ-PO4)Zn}3]: Crystal structures and relationships to similar open framework zinco- and aluminophospates
- 2011Crystal chemistry of elpidite from Khan Bogdo (Mongolia) and its K- and Rb-exchanged forms
- 2010A new polymorph of Ba(AsO3OH): Synthesis, crystal structure and vibrational spectra
- 2010Hydrogen bonding in coquimbite, nominally Fe2(SO4)3×9H2O, and the relationship between coquimbite and paracoquimbite
- 2009Investigations in the systems Sr-As-O-X (X = H, Cl): Preparation and crystal structure refinements of the anhydrous arsenates(V) Sr3(AsO4)2, Sr2As2O7, a- and ß-SrAs2O6, and of the apatite-type phases Sr5(AsO4)3OH and Sr5(AsO4)3Cl
- 2008Synthesis, crystal structure, infrared and Raman spectra of Sr4Cu3(AsO4)2(AsO3OH)4×3H2O and Ba2Cu4(AsO4)2(AsO3OH)3citations
- 2008Structural and spectroscopic study of Mg13.4(OH)6(HVO4)2(H0.2VO4)6
- 2004The first proof of protonated anion tetrahedra in the tsumcorite-type compoundscitations
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article
Water in the Alluaudite Type-Compounds
Abstract
<p>In this study, a new cobalt arsenate belonging to the alluaudite supergroup compounds with the general formula of Co-3(AsO4)(0.5+x)(HAsO4)(2-x)(H2AsO4)(0.5+x)[(H,)(0.5)(H2O,H3O)(0.5)](2)(x+) (denoted as CoAsAllu) was synthesized under hydrothermal conditions. Its crystal structure was determined by a room-temperature single-crystal X-ray diffraction analysis: space group C2/c, a = 11.6978(8), b = 12.5713(7), c = 6.7705(5) & ANGS;, beta = 113.255(5)& DEG;, V = 914.76(11) & ANGS;(3), Z = 2 for As6H8Co6O25. It represents a new member of alluaudite-like protonated arsenates and the first alluaudite-like phase showing both protonation of the tetrahedral site and presence of the H2O molecules in the channels. In the asymmetric unit of CoAsAllu, one of the two Co, one of the two As and one of the seven O atoms lie at 4e special positions (site symmetry 2). The crystal structure consists of the infinite edge-shared CoO6 octahedra chains, running parallel to the [101 over bar ] direction. The curved chains are interconnected by [(As1O(4))(0.5)(H(2)As1O(4))(0.5)](2-) and [HAs2O4](2-) tetrahedra forming a heteropolyhedral 3D open framework with two types of parallel channels. Both channels run along the c-axis and are located at the positions (1/2, 0, z) and (0, 0, z), respectively. The H2 and H4 hydrogen atoms of O2H2 and O4H4 hydroxyl groups are situated in channel 1, while the uncoordinated water molecule H(2)O7 at half-occupied 4e special positions and hydrogen atoms of O6H6 hydroxyl group were found in channel 2. The results of the magnetic investigations confirm the quasi one-dimensional structure of divalent cobalt ions. They are antiferromagnetically coupled with the intrachain interaction parameter of J & AP; -8 cm(-1) and interchain parameter of J' & AP; -2 cm(-1) that become effective below the Neel temperature of 3.4 K.</p>