| People | Locations | Statistics |
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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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Spratt, John
Natural History Museum
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2022Polytypism in mcalpineite: a study of natural and synthetic Cu3TeO6citations
- 2021Kernowite, Cu<sub>2</sub>Fe(AsO<sub>4</sub>)(OH)<sub>4</sub>⋅4H<sub>2</sub>O, the Fe<sup>3+</sup>-analogue of liroconite from Cornwall, UKcitations
- 2021Oscillatory- and sector-zoned pyrochlore from carbonatites of the Kerimasi volcano, Gregory rift, Tanzaniacitations
- 2021Elucidating the natural–synthetic mismatch of Pb2+Te4+O3: The redefinition of fairbankite to Pb122+(Te4+O3)11(SO4)citations
- 2021Native tungsten from the Bol'shaya Pol'ya river valley and Mt Neroyka, Russia
- 2021Wildcatite, CaFe3+Te6+O5(OH), the second new tellurate mineral from the Detroit district, Juab County, Utahcitations
- 2021Hybridization of Alkali Basaltic Magmas: a Case Study of the Ogol Lavas from the Laetoli Area, Crater Highlands (Tanzania)citations
- 2019Dokuchaevite, Cu<sub>8</sub>O<sub>2</sub>(VO<sub>4</sub>)<sub>3</sub>Cl<sub>3</sub>, a new mineral with remarkably diverse Cu<sup>2+</sup> mixed-ligand coordination environmentscitations
- 2019The crystal structures of the mixed-valence tellurium oxysalts tlapallite, (Ca,Pb)<sub>3</sub>CaCu<sub>6</sub>[Te<sup>4+</sup><sub>3</sub>Te<sup>6+</sup>O<sub>12</sub>]<sub>2</sub>(Te<sup>4+</sup>O<sub>3</sub>)<sub>2</sub>(SO<sub>4</sub>)<sub>2</sub>·3H<sub>2</sub>O, and carlfriesite, CaTe<sup>4+</sup><sub>2</sub>Te<sup>6+</sup>O<sub>8</sub>citations
- 2015Barrydawsonite-(Y), Na<sub>1.5</sub>CaY<sub>0.5</sub>Si<sub>3</sub>O<sub>9</sub>H: a new pyroxenoid of the pectolite–serandite groupcitations
- 2013Diegogattaite, Na<sub>2</sub>CaCu<sub>2</sub>Si<sub>8</sub>O<sub>2</sub>0·H<sub>2</sub>O: a new nanoporous copper sheet silicate from Wessels Mine, Kalahari Manganese Fields, Republic of South Africacitations
Places of action
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article
Elucidating the natural–synthetic mismatch of Pb2+Te4+O3: The redefinition of fairbankite to Pb122+(Te4+O3)11(SO4)
Abstract
<jats:title>Abstract</jats:title><jats:p>For four decades fairbankite was reported to have the formula Pb2+(Te4+O3), but repeated attempts to isolate fairbankite crystals for structural determination found only the visually similar cerussite and, more rarely, anglesite. The crystal-structure determination of fairbankite using single-crystal X-ray diffraction, supported by electron microprobe analysis and X-ray powder diffraction on the type specimen, has shown that fairbankite contains essential S, along with Pb, Te, and O. The chemical formula of fairbankite has been revised to Pb122+(Te4+O3)11(SO4). This change has been accepted by the IMA–CNMNC, Proposal 19-I. The crystal structure of fairbankite [space group P1 (no. 1); revised cell: a = 7.0205(3) Å, b = 10.6828(6) Å, c = 14.4916(8) Å, a = 75.161(5)°, b = 81.571(4)°, g = 83.744(4)°, V = 1036.35(9) Å3, and Z = 1] is the first atomic arrangement known to contain a Te34+O96− non-cyclic, finite building unit. Fairbankite has an average structure, formed from a 3D framework of Pb2+On polyhedra, Te4+On polyhedra, and SO4 tetrahedra in a 12:11:1 ratio. The stereoactive lone pairs of the Pb2+ and Te4+ cations are oriented into void space within the structure. Fairbankite contains two mixed sites statistically occupied by Te4+ and S6+ in approximately 4:1 and 1:4 ratios. These two sites possess Te4+ in trigonal-pyramidal environment and S6+ in tetrahedral environment (with an additional O site to create tetrahedral SO4 shape for the S-dominant site). Six of the 10 fully occupied Te4+ sites have Te4+ in trigonal-pyramidal environment, while four have Te4+ at the center of highly distorted Te4+O4 disphenoids. The disphenoids allow for the creation of two dimeric Te24+O64− units in addition to the Te34+O96− trimeric unit, which contains two disphenoids. All linkage between disphenoids and trigonal pyramids is via corner-linking. Secondary connectivity is via long Te–O and Pb–O bonds.</jats:p>