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1-20 OF 88 RESULTS FOR
polyoxometalate
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Journal Article
Lumsdenite, NaCa 3 Mg 2 (As 3+ V 4+ 2 V 5+ 10 As 5+ 6 O 51 )·45H 2 O, a new polyoxometalate mineral from the Packrat mine, Mesa County, Colorado, USA Available to Purchase
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 16 January 2020
The Canadian Mineralogist (2020) 58 (1): 137–151.
...Anthony R. Kampf; John M. Hughes; Barbara P. Nash; Joe Marty; Timothy P. Rose ABSTRACT Lumsdenite (IMA 2018–092), ideally NaCa 3 Mg 2 (As 3+ V 4+ 2 V 5+ 10 As 5+ 6 O 51 )·45H 2 O, is a rare new polyoxometalate mineral from the Packrat mine, Gateway district, Mesa County, Colorado, USA. Crystals...
Journal Article
Caseyite, a new mineral containing a variant of the flat-Al 13 polyoxometalate cation Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 January 2020
American Mineralogist (2020) 105 (1): 123–131.
... that the structure crystal partly dehydrated prior to data collection. The analyzed constituents were normalized to provide a total of 100% when combined with the calculated H 2 O. The chemical data are reported in Table 1 . Caseyite new mineral polyoxometalate flat-Al 13 polyoxocation crystal structure...
Journal Article
Bicapite, KNa 2 Mg 2 (H 2 PV 14 5 + O 42 )·25H 2 O, a new polyoxometalate mineral with a bicapped Keggin anion from the Pickett Corral mine, Montrose County, Colorado, U.S.A. Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 December 2019
American Mineralogist (2019) 104 (12): 1851–1856.
... with a structure based on a bicapped Keggin anion. The discovery of bicapite and numerous other natural polyoxometalate compounds in the Colorado Plateau uranium/vanadium deposits make that the most productive region found to date for naturally occurring polyoxometalate compounds. Polyoxometalate compounds...
Journal Article
Niobium Is Highly Mobile As a Polyoxometalate Ion During Natural Weathering Open Access
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 November 2018
The Canadian Mineralogist (2018) 56 (6): 905–912.
... hosts for nuclear waste because of their resistance to weathering. Here we show that niobium can be highly mobile even at near-surface geochemical conditions as a soluble and unreactive polyoxometalate ion. Discovery of the first natural hexaniobate minerals, all formed at near-surface conditions...
Journal Article
Ramazzoite, [Mg 8 Cu 12 (PO 4 )(CO 3 ) 4 (OH) 24 (H 2 O) 20 ][(H 0.33 SO 4 ) 3 (H 2 O) 36 ], the first mineral with a polyoxometalate cation Available to Purchase
Anthony R. Kampf, George R. Rossman, Chi Ma, Donato Belmonte, Cristian Biagioni, Fabrizio Castellaro, Luigi Chiappino
Journal: European Journal of Mineralogy
Publisher: GeoScienceWorld Journals
Published: 01 July 2018
European Journal of Mineralogy (2018) 30 (4): 827–834.
...Anthony R. Kampf; George R. Rossman; Chi Ma; Donato Belmonte; Cristian Biagioni; Fabrizio Castellaro; Luigi Chiappino Ramazzoite (IMA2017-090), [Mg 8 Cu 12 (PO 4 )(CO 3 ) 4 (OH) 24 (H 2 O) 20 ][(H 0.33 SO 4 ) 3 (H 2 O) 36 ], is a new polyoxometalate (POM) mineral from the Monte Ramazzo mine, near...
Includes: Supplemental Content
Journal Article
Vanarsite, Packratite, Morrisonite, and Gatewayite: Four New Minerals Containing the [As 3+ V 4+,5+ 12 As 5+ 6 O 51 ] Heteropolyanion, a Novel Polyoxometalate Cluster Available to Purchase
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 January 2016
The Canadian Mineralogist (2016) 54 (1): 145–162.
... of all four new minerals contain the novel polyoxometalate-like heteropolyanion, [As 3+ As 5+ 6 V 4+ 2+ x V 5+ 10– x O 51 ] (11+ x )– ( x = 0 to 1.5), which is new to science. Fig. 7. Crystal drawing of packratite; clinographic projection in standard orientation. Vanarsite packratite...
Journal Article
Bettertonite, [Al 6 (AsO 4 ) 3 (OH) 9 (H 2 O) 5 ]·11H 2 O, a new mineral from the Penberthy Croft mine, St. Hilary, Cornwall, UK, with a structure based on polyoxometalate clusters Available to Purchase
Journal: Mineralogical Magazine
Published: 01 December 2015
Mineralogical Magazine (2015) 79 (7): 1849–1858.
... produces large channels along [100] that are filled with water molecules. The basic building block in the layers is a hexagonal ring of edge-shared octahedra with an AsO 4 tetrahedron attached to one side of the ring by corner-sharing. These polyoxometalate clusters, of composition [AsAl 6 O 11 (OH) 9 (H 2...
Image
Polyoxometallate clusters in penberthycroftite. The independent Al-centred ... Available to Purchase
in Penberthycroftite, [Al 6 (AsO 4 ) 3 (OH) 9 (H 2 O) 5 ]·8H 2 O, a second new hydrated aluminium arsenate mineral from the Penberthy Croft mine, St. Hilary, Cornwall, UK
> Mineralogical Magazine
Published: 01 December 2016
Fig. 6. Polyoxometallate clusters in penberthycroftite. The independent Al-centred octahedra are labelled 1 to 6.
Journal Article
The Atomic Arrangement of the Sherwoodite Structural Unit: Redefinition of the Sherwoodite Vanadoaluminate Heteropoly Complex as [AlV 4+ V 5+ 12 O 39 ] 11− Available to Purchase
Publisher: Mineralogical Association of Canada
Published: 29 September 2023
The Canadian Journal of Mineralogy and Petrology (2023) 61 (5): 979–986.
...John M. Hughes; Anthony R. Kampf; Barbara P. Nash; Joe Marty Abstract Sherwoodite, putatively Ca 4.5 (AlV 5+ 12 V 4+ 2 O 40 )·28H 2 O, was among the early naturally occurring polyoxometalates to be reported from the Uravan Mineral Belt; the ideal formula of sherwoodite is here redefined as Ca 5.5...
Journal Article
Petermegawite, Al 6 (Se 4+ O 3 ) 3 [SiO 3 (OH)](OH) 9 ⋅10H 2 O, a New AI-Bearing Selenite Mineral, from the El Dragón Mine, Potosí, Bolivia Available to Purchase
Hexiong Yang, Xiangping Gu, Michael M. Scott, Robert A. Jenkins, Ronald B. Gibbs, James A. Mcglasson, Robert T. Downs
Publisher: Mineralogical Association of Canada
Published: 29 September 2023
The Canadian Journal of Mineralogy and Petrology (2023) 61 (5): 987–998.
... and penberthycroftite. As a new polyoxometalate building block, this type of cluster may be expressed with a general chemical formula [ TM 6 X 25 ], where T = tetrahedrally coordinated cation, M = octahedrally coordinated cation, and X = O, OH, H 2 O. Fig. 2. A microscopic view of aggregates of colorless...
Journal Article
Pomite and pseudopomite, two new carbonate-encapsulating mixed-valence polyoxovanadate minerals Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 November 2022
American Mineralogist (2022) 107 (11): 2143–2149.
...Anthony R. Kampf; John M. Hughes; Chi Ma; Joe Marty; Timothy P. Rose Abstract Pomite (IMA2021-063), ideally Ca 3 [ V 5 4 + V 10 5 + O 37 (CO 3 )]·37H 2 O, and pseudopomite (IMA2021-064), ideally Ca 3.5 [ V 6 4 + V 9 5 + O 37 (CO 3 )]·32H 2 O, are two new polyoxometalate minerals from the Blue...
Journal Article
Kegginite, Pb 3 Ca 3 [AsV 12 O 40 (VO)]·20H 2 O, a new mineral with a novel ε-isomer of the Keggin anion Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 February 2017
American Mineralogist (2017) 102 (2): 461–465.
... . Kegginite is trigonal, P 3 ¯ , with a = 14.936(5), c = 15.846(5) Å, V = 3061(2) Å 3 , and Z = 2. The crystal structure of kegginite ( R 1 = 0.064 for 1356 F o > 4σ F reflections) contains a [ As 5 + V 12 5 + O 40 ( VO ) ] 12 − polyoxometalate cluster, which is a mono-capped Keggin ε-isomer. Powder...
Journal Article
Rehydration of Zn-Al layered double hydroxides Available to Purchase
Journal: Clays and Clay Minerals
Publisher: Clay Minerals Society
Published: 01 February 1997
Clays and Clay Minerals (1997) 45 (1): 92–98.
...F. Kooli; C. Depege; A. Ennaqadi; A. de Roy; J. P. Besse Abstract Rehydration is shown to be straightforward for the reconstruction of polyoxometallate-pillared layered double hydroxides. Zn-Al hyfrotalcite-like minerals were prepared with Zn/Al ratios of 1 to 5 by coprecipitation at pH 7. Good...
Journal Article
Waipouaite, Ca 3 ( V 4.5 4 + V 0.5 5 + )O 9 [(Si 2 O 5 (OH) 2 ][Si 3 O 7.5 (OH) 1.5 ]·11H 2 O, a new polyoxovanadate mineral from the Aranga Quarry, New Zealand Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 May 2024
American Mineralogist (2024) 109 (5): 934–939.
... to contain [V 5 O 17 ] polyoxovanadate units. Polyoxovanadates (POVs) are a subclass of a larger family of polyoxometalates (POMs), metal-oxygen cluster compounds, which have unique structural and electronic properties that have proven to have a remarkable array of technological and biochemical uses...
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Journal Article
Protocaseyite, a new decavanadate mineral containing a [Al 4 (OH) 6 (H 2 O) 12 ] 6+ linear tetramer, a novel isopolycation Available to Purchase
Anthony R. Kampf, Mark A. Cooper, John M. Hughes, Chi Ma, William H. Casey, Frank C. Hawthorne, Joe Marty
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 June 2022
American Mineralogist (2022) 107 (6): 1181–1189.
... of America Protocaseyite new mineral polyoxometalate crystal structure Burro mine San Miguel County Colorado U.S.A. Low-temperature near-surface environments, particularly those containing highly charged metal cations, have the potential to form polyoxometalate ions. In recent years...
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Comparison of various catalysts in the synthesis of pentyl acetate ... Available to Purchase
in Effects of the Inclusion of Ce and Ni Species on Ti for Modification of K10-Clay by Sol-Gel and their Use as Catalysts in the Liquid-Phase Esterification Systems
> Clays and Clay Minerals
Published: 01 April 2023
. ( 2018 ) Zeolite ZSM-5 130 43.0 4 Gao et al. ( 2020 ) IL/MIL-101(Cr) 80 82.4 1 Hassan et al. ( 2017 ) Ziconium sulfophenyl phosphonate 50 74.0 14 Curini et al. ( 2000 ) Acid modiffied attapulgite 117 89.67 3 Pushpaletha & Lalithambika ( 2011 ) Cerium polyoxometalate 25
Journal Article
Bonding between the decavanadate polyanion and the interstitial complex in pascoite-family minerals Available to Purchase
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 04 March 2022
The Canadian Mineralogist (2022) 60 (2): 341–359.
[email protected] 11 7 2021 20 11 2021 2022 decavanadate bond-valence theory Lewis acid Lewis base interstitial complex Polyoxometalates are compounds that contain a cluster or clusters, usually anionic, of three or more transition-metal-centered polyhedra that are linked...
Journal Article
Wypych, F. & Satyanarayana, K.G. (Editors) 2004. Clay Surfaces – Fundamentals and Applications. : Interface Science and Techology – Volume 1. Elsevier Academic Press, 566 pp. Price $211.00. ISBN 0-12-088439-9. Available to Purchase
Journal: Clay Minerals
Published: 01 June 2006
Clay Minerals (2006) 41 (2): 691–692.
..., which are then used to intercalate different organic molecules. Hu and Li are the authors of a chapter on Polyoxometalate Complexes of Layered Double Hydroxides. After outlining the structures of several polyoxometalates, conventional (exchange, coprecipitation, etc.) and less conventional (e.g...
Journal Article
Penberthycroftite, [Al 6 (AsO 4 ) 3 (OH) 9 (H 2 O) 5 ]·8H 2 O, a second new hydrated aluminium arsenate mineral from the Penberthy Croft mine, St. Hilary, Cornwall, UK Available to Purchase
Journal: Mineralogical Magazine
Published: 01 December 2016
Mineralogical Magazine (2016) 80 (7): 1149–1160.
...Fig. 6. Polyoxometallate clusters in penberthycroftite. The independent Al-centred octahedra are labelled 1 to 6. ...
Journal Article
Structural and chemical complexity of minerals: an update Available to Purchase
Sergey V. Krivovichev, Vladimir G. Krivovichev, Robert M. Hazen, Sergey M. Aksenov, Margarita S. Avdontceva, Alexander M. Banaru, Liudmila A. Gorelova, Rezeda M. Ismagilova, Ilya V. Kornyakov, Ivan V. Kuporev, Shaunna M. Morrison, Taras L. Panikorovskii, Galina L. Starova
Journal: Mineralogical Magazine
Published: 01 April 2022
Mineralogical Magazine (2022) 86 (2): 183–204.
... that have been discovered since 2013 (in particular, polyoxometalates; see below). The average chemical complexities (arithmetic means) are 1.63(1) bits per atom and 63(1) bits per formula, which account for the average number of 38.7 atoms per formula (based upon 5455 chemical formulae). The latter value...
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