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Lindqvist ions

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Journal Article
Published: 01 June 2017
Mineralogical Magazine (2017) 81 (3): 543–554.
.... The strongest reflections in the x-ray diffraction diagram are: [ d obs. in Å ( I )( hkl )] 9.282(36)(001), 8.610(100)(100, 01 ), 3.257(30)(03 , 1 1) and 3.058(18)(1 0, 2 2). Hansesmarkite is the third naturally occurring hexaniobate in which six edge-sharing Nb-octahedra form the Lindqvist ion...
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Journal Article
Published: 01 August 2014
European Journal of Mineralogy (2014) 26 (4): 567–576.
..., C 2/ m , with a = 15.329(1), b = 9.4121(5), c = 11.2832(9) Å, β = 118.650(4)°, V = 1428.6(2) Å 3 and Z = 2. Peterandresenite has a novel structure consisting of six edge-sharing Nb-octahedra forming a super octahedron known as a Lindqvist ion. One Mn 2 + octahedron interconnects three Lindqvist ions...
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Image
A view showing how the Mn1-site (medium grey) connects three <b>Lindqvist</b> <b>ions</b>...
Published: 01 August 2014
Fig. 5 A view showing how the Mn1-site (medium grey) connects three Lindqvist ions (light grey) into a layer (a). The Mn2 site (dark grey) protrudes from each layer into the space between Lindqvist ions in adjacent layers, but forms no direct bonds (b). Generated using CrystalMaker ® .
Image
The Nb 6 O 19  8−  <b>Lindqvist</b> <b>ion</b> viewed as ball-and-stick and polyhedral mo...
Published: 01 August 2014
Fig. 4 The Nb 6 O 19 8− Lindqvist ion viewed as ball-and-stick and polyhedral models. Within the cluster oxygen atoms O3, O4 and O5 are called bridging oxygens and O2, O7 are called terminal oxygens. Generated using CrystalMaker ® .
Journal Article
Published: 01 February 2018
Mineralogical Magazine (2018) 82 (1): 111–120.
... lattice. The melcherite structure is built by layers of [(Ba,K)(O,H 2 O) 9 ] polyhedra and the [Nb 6 O 19 ] 8− super-octahedron (Lindqvist anion) interconnected by [(Na,Ca)O 6 ] polyhedra. Cations of Mg 2+ are bonded to six water molecules each and are not associated with Lindqvist oxygen ions...
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Journal Article
Published: 01 December 1962
American Mineralogist (1962) 47 (11-12): 1356–1362.
...Bengt Lindqvist; Sven Jansson Abstract In place of the current conception of hisingerite belonging to the montmorillonite group, a tentative proposal is offered that it is principally a mica mineral with extensive substitutions of Fe for Si (the reason for the cryptocrystalline character...
Journal Article
Published: 01 August 2008
American Mineralogist (2008) 93 (8-9): 1384–1392.
... . Lindqvist-Reis , P. , Lamble , K. , Pattanaik , S. , Persson , I. , and Sandström , M. ( 2000 ) Hydration of the yttrium(III) ion in aqueous solution. An X-ray diffraction and XAFS structural study . Journal of Physical Chemistry , B104 , 402 – 408 . Marcus , Y. ( 1988...
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Image
A view along the  a  axis showing how the seven-coordinated Ca (blue) <b>ion</b> o...
Published: 01 June 2017
Fig. 5. A view along the a axis showing how the seven-coordinated Ca (blue) ion only connects to one Lindqvist ion and fills the space between the rods tying the structure together via hydrogen bonds. For simplicity some Ca-coordinations have been removed from the lower part of the figure
Journal Article
Published: 01 February 2002
American Mineralogist (2002) 87 (2-3): 262–278.
... , 339 –350. Näslund, J., Lindqvist-Reis, P., Persson, I., and Sandström, M. ( 2000 ) Steric Effects Control the Structure of the Solvated Lanthanum(III) Ion in Aqueous, Dimethyl Sulfoxide, and N,N ′-Dimethylpropyleneurea Solution. An EXAFS and Large-Angle X-ray Scattering Study. Journal...
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Journal Article
Published: 01 November 2018
The Canadian Mineralogist (2018) 56 (6): 905–912.
... that are missing from most current geochemical transport codes. More importantly, synthesis work at high pH shows that the Lindqvist ion is present in the reactions as an intermediate complex when producing synthetic equivalents of minerals such as lueshite, pyrochlore, and columbite at low temperature...
FIGURES
Image
Nb(V) speciation in solution as a function of pH. (A) Nb 2 O 5 · n H 2 O (s...
Published: 01 November 2018
Fig. 1. Nb(V) speciation in solution as a function of pH. (A) Nb 2 O 5 · n H 2 O (s); (B) Nb(OH) 5 (aq); (C) [H 3 Nb 6 O 19 ] 5– (aq); (D) [H 2 Nb 6 O 19 ] 6– (aq); (E) [HNb 6 O 19 ] 7– (aq); (F) [Nb 6 O 19 ] 8– (aq). The ball and stick structure is the Lindqvist ion of (F) where the green
Journal Article
Published: 01 August 2017
American Mineralogist (2017) 102 (8): 1646–1656.
... all column ions by sulfide ions), S 2– is positioned in the anion column at z = 0.5 (halfway between the mirror planes at z = ¼ and z = ¾) in the energy-optimized structure. The calculated energies for partial incorporation of S 2– demonstrate that in an energy-optimized structure, S 2– is displaced...
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Journal Article
Published: 01 June 2005
Clays and Clay Minerals (2005) 53 (3): 278–286.
... with the incident angle, indicating that the uranyl ions are oriented neither perpendicular nor parallel to the basal plane of montmorillonite. The equilibrated geometry from Monte Carlo simulations suggests that uranyl ions form outer-sphere surface complexes with the [O=U=O] 2+ axis tilted at an angle of ~45...
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Image
A view perpendicular to the  a  axis showing how the Mn 2+  octahedra (pink...
Published: 01 June 2017
Fig. 4. A view perpendicular to the a axis showing how the Mn 2+ octahedra (pink) tie the Lindqvist ions (green) into rods along [100]. The terminal oxygen atoms of the Mn octahedron bond to hydrogen (faint pink). Calcium ions and water molecules coordinated to calcium and non-bonded atoms
Journal Article
Published: 01 December 2012
Mineralogical Magazine (2012) 76 (8): 3095–3104.
... showed that the structure of the uranyl-triscarbonato [UO 2 (CO 3 ) 3 ] species was maintained after surface attachment and that uptake of uranyl ions took place mainly via mineral surface reactions. * E-mail: roy.wogelius@manchester.ac.uk 19 12 2011 12 6 2012 © 2012...
FIGURES
Journal Article
Published: 01 August 2000
Mineralogical Magazine (2000) 64 (4): 683–697.
...-temperature effects may mimic those of primary high temperature and are especially characterized by replacement rims, pyrochlore-in-pyrochlore veinlets and low A -ion totals (Carillon Dam, Lueshe, Myeba). T he pyrochlore group minerals have long been considered typical of carbonatites and their general...
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Journal Article
Published: 01 August 2009
Mineralogical Magazine (2009) 73 (4): 569–583.
... and OH - species confirm approximately the charge neutrality equation. The high H/(Li+K+P) ion ratio of igneous quartz compared to hydrothermal and metamorphic quartz, suggests that igneous quartz preferentially incorporates H as OH in lieu of Li, K and P. The results confirm that the FTIR absorption...
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Journal Article
Published: 01 October 2014
Mineralogical Magazine (2014) 78 (5): 1097–1113.
... on the adsorption behaviour of the uranyl ( UO 2 2 + ) ion onto the surfaces of both wüstite and portlandite [Ca(OH) 2 ; representative of the expected cementitious phases]. Surface co-ordination chemistry and speciation were determined by ex situ X-ray absorption spectroscopy measurements (both X-ray absorption...
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Journal Article
Published: 01 April 2009
American Mineralogist (2009) 94 (4): 467–475.
... of light REE-sorbed δ-MnO 2 suggest that adsorbed light REEs have distorted tenfold-coordination spheres consisting of six short and four long REE–O bonds and form inner sphere complexes. Their coordination structures are more disordered than those of aquo ions and FeOOH samples. * E-mail: a.ohta...
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Journal Article
Published: 01 February 2004
Mineralogical Magazine (2004) 68 (1): 135–146.
... °ngberg , D. , Lindqvist-Reis , P. , Hermansson , K. , Persson , I. , and Sandström , M. ( 2001 ) Hydration of the calcium ion. An EXAFS, large-angle X-ray scattering, and molecular dynamics simulation study . Journal of the American Chemical Society , 123 , 431 – 441...
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