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decavanadate

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Journal Article
Published: 01 June 2022
American Mineralogist (2022) 107 (6): 1181–1189.
... O 28 ] 6− decavanadate polyoxoanion and a novel [Al 4 (OH) 6 (H 2 O) 12 ] 6+ polyoxocation. * E-mail: akampf@nhm.org . Manuscript handled by G. Diego Gatta 17 3 2021 16 6 2021 Copyright © 2022 by the Mineralogical Society of America 2022 Mineralogical Society...
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Journal Article
Published: 04 March 2022
The Canadian Mineralogist (2022) 60 (2): 341–359.
...Frank C. Hawthorne; John M. Hughes; Mark A. Cooper; Anthony R. Kampf ABSTRACT The decavanadate isopolyanion, [V 10 O 28 ] 6– , is a constituent of pascoite-family vanadate minerals and synthetic materials, and both protonated, [H x V 10 O 28 ] (6– x )– , and mixed-valence, [V 4+ x V 5+ 10– x )O 28...
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Journal Article
Published: 16 January 2020
The Canadian Mineralogist (2020) 58 (1): 125–135.
...Anthony R. Kampf; Paul M. Adams; Barbara P. Nash; Joe Marty; John M. Hughes ABSTRACT Okieite, Mg 3 [V 10 O 28 ]·28H 2 O, is a new decavanadate mineral from the Burro mine, Slick Rock district, San Miguel County, Colorado, USA (type locality); the mineral is also found at the Hummer mine, Paradox...
FIGURES
Journal Article
Published: 01 March 2019
The Canadian Mineralogist (2019) 57 (2): 235–244.
...Mark A. Cooper; Frank C. Hawthorne; Anthony R. Kampf; John M. Hughes Abstract The decavanadate anion, [V 10 O 28 ] 6− , is a common constituent of vanadate minerals, and both protonated, [H x V 10 O 28 ] (6− x )− , and mixed-valent, [(V 4+ x V 5+ 10− x )O 28 ] (6+ x )− , derivatives also occur...
FIGURES
Journal Article
Published: 01 March 2019
The Canadian Mineralogist (2019) 57 (2): 245–253.
...Mark A. Cooper; Frank C. Hawthorne; Anthony R. Kampf; John M. Hughes Abstract The decavanadate anion, [V 10 O 28 ] 6− , is a common constituent in vanadate minerals and synthetic materials, and both protonated, [H x V 10 O 28 ] (6− x )− , and mixed-valent, [(V 4+ x V 5+ 10− x )O 28 ] (6+ x...
FIGURES
Journal Article
Published: 01 November 2018
The Canadian Mineralogist (2018) 56 (6): 859–869.
...Anthony R. Kampf; Barbara P. Nash; Paul M. Adams; Joe Marty; John M. Hughes Abstract Ammoniolasalite, [(NH 4 ) 2 Mg 2 (H 2 O) 20 ][V 10 O 28 ], is a new decavanadate species (IMA2017-094) from the Burro mine, Slick Rock district, San Miguel County, Colorado, USA (38°2′42″N 108°53′23″W). The mineral...
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Journal Article
Published: 01 May 2017
The Canadian Mineralogist (2017) 55 (3): 473–481.
... to R 1 = 0.0946 for 2711 independent reflections with F > 4σ( F ). The structural unit in burroite is the [V 10 O 28 ] 6– decavanadate group; charge balance in the structure is maintained by the [Ca 2 (NH 4 ) 2 ·15H 2 O] 6+ interstitial complex. Linkage between the structural unit and the components...
FIGURES
Journal Article
Published: 01 March 2017
The Canadian Mineralogist (2017) 55 (2): 207–217.
... )( hkl )]: 8.92(100)( ), 10.70(31)(002), 9.77(28)(010), and 7.4539(22)( ). The atomic arrangement of hydropascoite was solved and refined to R 1 = 0.0488 for 8187 independent reflections with F > 4σ F . The structural unit in hydropascoite is the [V 10 O 28 ] 6– decavanadate group; charge balance...
FIGURES
Journal Article
Published: 01 May 2016
The Canadian Mineralogist (2016) 54 (3): 555–558.
..., USA, were described as hydronium-bearing decavanadate minerals with the formulae {[Ca(H 2 O) 7 ] 2 (H 2 O) 2 (H 3 O) 2 }{V 10 O 28 } and {[Na 2 (H 2 O) 10 ](H 3 O) 4 }{V 10 O 28 }, respectively. Because these phases correspond to known synthetic phases with these formulae, the presence of NH 4...
Journal Article
Published: 22 June 2015
The Canadian Mineralogist (2014) 52 (6): 1007–1018.
... )]: 10.34(57)( 1 ¯ 01), 8.27(100)(011,101), 7.90(21)(110), and 1.9814(22)( 1 ¯ 17, 2 ¯ 17). The atomic arrangement of bluestreakite was solved and refined to R 1 = 0.0339 for 7395 independent reflections with F > 4σ ( F ). The structural unit in bluestreakite is a partially reduced decavanadate group...
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Journal Article
Published: 01 February 2014
The Canadian Mineralogist (2014) 52 (1): 15–25.
... was solved and refined to R 1 = 0.0379 for 3806 F o > 4σ F reflections. The structural unit is a decavanadate polyanion, (V 10 O 28 ) 6− ; charge balance in the structure is maintained by the [Na 2 Ca 2 (H 2 O)24] 6+ interstitial unit that exists as Na(H 2 O) 6 octahedra and Ca(H 2 O) 8 polyhedra...
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Journal Article
Published: 01 April 2013
The Canadian Mineralogist (2013) 51 (2): 297–312.
... on the basis of 3,440 diffractions with F o > 4σ F . The structural unit is a decavanadate polyanion, (V 10 O 28 ) 6− . The interstitial unit linking the structural units has a composition of {[Ca(H 2 O) 7 ] 2 (H 2 O) 2 (H 3 O) 2 } 6+ , and is formed of an isolated [Ca(H 2 O) 7 ] 2+ polyhedron, a (H 3 O...
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Journal Article
Published: 01 October 2011
The Canadian Mineralogist (2011) 49 (5): 1243–1251.
..., and 2.997(29)3̄31,401. The atomic arrangement of gunterite was refined to R 1 = 0.0632. The structural unit is a doubly-protonated decavanadate polyanion, {H 2 [V 10 O 28 ]}. The interstitial units linking the structural units contain two Na polyhedra; the Na2 polyhedron is split into two partially occupied...
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Journal Article
Published: 01 April 2011
The Canadian Mineralogist (2011) 49 (2): 595–604.
...). The atomic arrangement of rakovanite has been refined to R 1 = 0.0383; the structural unit in the phase is formed of a triply-protonated decavanadate polyanion, {H 3 [V 10 O 28 ]}. The structural units are linked by the interstitial complexes, the (Na 3 ·15H 2 O) contents of which balance the +3 charges...
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Journal Article
Published: 01 February 2009
The Canadian Mineralogist (2009) 47 (1): 206.
Journal Article
Published: 01 October 2008
The Canadian Mineralogist (2008) 46 (5): 1365–1372.
...)°. The structure was determined using direct methods and three-dimensional X-ray-diffraction data measured with a CCD detector and refined to R = 0.0289. The mineral is a member of the pascoite group of minerals, which have a structural unit containing the [V 10 O 28 ] 6− decavanadate polyanion. In lasalite...
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Journal Article
Published: 01 August 2005
The Canadian Mineralogist (2005) 43 (4): 1379–1386.
... the hydrogen atoms allow us to assign the C 2/ m disordered model to the atomic arrangement. The structural unit, or anionic portion of the atomic arrangement in pascoite, is the decavanadate polyanion (V 10 O 28 ) 6− , similar to the decavanadate group found in hummerite and numerous synthetic vanadates...
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Charge deficiency of <span class="search-highlight">decavanadate</span> units for 18 <span class="search-highlight">decavanadate</span> minerals  versu...
Published: 04 March 2022
Fig. 2. Charge deficiency of decavanadate units for 18 decavanadate minerals versus the mean calculated bond-valence sum for the 10 V ions in that decavanadate unit (red circles). The charge deficiencies for nashite and bluestreakite (green circles) show their mixed-valence nature.
Image
Cell volume per <span class="search-highlight">decavanadate</span> unit as a function of the number of H 2 O grou...
Published: 04 March 2022
Fig. 9. Cell volume per decavanadate unit as a function of the number of H 2 O groups in decavanadate minerals.
Image
Crystal structure of caseyite viewed along [100]. The interstitial H 2 O gr...
Published: 01 January 2020
Figure 4. Crystal structure of caseyite viewed along [100]. The interstitial H 2 O groups are white spheres. The doubly protonated decavanadate anion #1 includes the V1–V5 octahedra. The normal decavanadate anion #2 includes the V6–V15 octahedra. The unit cell is shown by dashed lines. (Color