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kanemite

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Journal Article
Published: 01 February 2015
Mineralogical Magazine (2015) 79 (1): 103–120.
...Daniela Schmidmair; Volker Kahlenberg; Daniel M. Többens; Herwig Schottenberger; Jochem de Wit; Ulrich J. Griesser Abstract The high-temperature- and moisture-dependent behaviour of synthetic kanemite (NaSi 2 O 4 (OH)·3H 2 O or SKS-10 ) has been studied by in situ powder X-ray diffraction. Heating...
FIGURES | View All (8)
Journal Article
Published: 01 May 2013
American Mineralogist (2013) 98 (5-6): 1000–1007.
...Juan I. Corredor; Agustín Cota; Esperanza Pavón; Maria D. Alba Abstract Kanemite belongs to the group of naturally occurring sodium silicate minerals that was first found in Kanem, at the edge of the Lake Chad, and has been synthesized in different ways from NaOH-SiO 2 mixtures and used...
FIGURES | View All (8)
Journal Article
Journal: Clay Minerals
Published: 01 September 2002
Clay Minerals (2002) 37 (3): 531–542.
...C. EYPERT-BLAISON; F. VILLIÉRAS; L. J. MICHOT; M. PELLETIER; B. HUMBERT; J. GHANBAJA; J. YVON Abstract The surface properties of various synthetic layered silicates, Na-kanemite, Na-kenyaite and magadiite, exchanged with H, K and Ca, were examined using high-resolution nitrogen and argon...
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Journal Article
Published: 01 August 1999
American Mineralogist (1999) 84 (7-8): 1170–1175.
...Laurence A. J. Garvie; Bertrand Devouard; Thomas L. Groy; Fernando Camara; Peter R. Buseck Abstract Kanemite was studied by single-crystal X-ray diffraction. The mineral, ideally NaHSi 2 O 5 .3H 2 O, is orthorhombic (space group Pbcn); unit-cell parameters are a = 4.946(3), b = 20.502(15), c...
Journal Article
Published: 01 February 1999
European Journal of Mineralogy (1999) 11 (1): 125–134.
Journal Article
Published: 01 August 1977
American Mineralogist (1977) 62 (7-8): 763–771.
...K. Beneke; G. Lagaly Abstract The sodium silicate kanemite (idealized: NaHSi 2 O 5 · 3H 2 O) is shown to have a layer structure probably built up by “Zweiereinfachschichten.” The interlayer water can be reversibly removed, and the sodium ions can be exchanged by organic cations and by protons...
Journal Article
Published: 01 August 2010
Clays and Clay Minerals (2010) 58 (4): 501–514.
... of their different characteristics associated with these properties. Kanemite (1:0 phyllosilicate), kaolinite (1:1 phyllosilicate), and pyrophyllite and talc (2:1 phyllosilicates with no-layer charge) were examined in order to determine the effect of layer structure, whereas the hydrothermal reactivity of silicates...
FIGURES | View All (9)
Image
Folded 6 3  sheets of u–d tetrahedra in ( a )  sanbornite  and  <b>kanemite</b>  a...
Published: 01 February 2019
Fig. 12. Folded 6 3 sheets of u–d tetrahedra in ( a ) sanbornite and kanemite and ( b ) makatite ; cross-sections of each sheet show the folding in one direction, and the u–d symbols indicate the different u–d arrangements in each type of sheet.
Image
Comparison between the powder XRD patterns of <b>kanemite</b> starting material an...
Published: 01 February 2015
F ig . 1. Comparison between the powder XRD patterns of kanemite starting material annealed ex situ at five different temperatures. Characteristic peaks of the monohydrate (NaSi 2 O 4 (OH)·H 2 O, 60°C) and NaSi 2 O 4 (OH) (150°C) are indicated by arrows.
Image
Projections of a single silicate layer in ( a ) <b>kanemite</b>, ( b ) NaSi 2 O 4 ...
Published: 01 February 2015
F ig . 4. Projections of a single silicate layer in ( a ) kanemite, ( b ) NaSi 2 O 4 (OH)·H 2 O and ( c ) NaSi 2 O 4 (OH) parallel to the normal of the sheet in a topological description showing the connectivities of the Si atoms.
Image
Projections of the crystal structures of ( a ) <b>kanemite</b>, ( b ) NaSi 2 O 4 (...
Published: 01 February 2015
F ig . 6. Projections of the crystal structures of ( a ) kanemite, ( b ) NaSi 2 O 4 (OH)·H 2 O and ( c ) NaSi 2 O 4 (OH) along the directions of the zweier single chains. For the sake of clarity the origin of the unit cell of kanemite has been shifted to [0 −¼ 0].
Image
XRD diagrams of <b>kanemite</b>: ( a ) Si&#x2F;Na = 1 and ( b ) Si&#x2F;(Na+NH 4 ) = 1. ( c ...
Published: 01 May 2013
Figure 1 XRD diagrams of kanemite: ( a ) Si/Na = 1 and ( b ) Si/(Na+NH 4 ) = 1. ( c ) Structure of kanemite. T = tridymite and C = cristoballite.
Image
1 H (SP) MAS NMR spectra of <b>kanemite</b>: ( a ) Si&#x2F;Na = 1 and ( b ) Si&#x2F;(Na+NH 4...
Published: 01 May 2013
Figure 5 1 H (SP) MAS NMR spectra of kanemite: ( a ) Si/Na = 1 and ( b ) Si/(Na+NH 4 ) = 1. ( c ) Relation between proportions of proton involved in hydrogen bonds and proton from water as function of synthesis medium and mineralizing agent.
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IR&#x2F;FT spectra of <b>kanemite</b>: Si&#x2F;Na = 1 ( left ) and Si&#x2F;(Na+NH 4 ) = 1 ( right...
Published: 01 May 2013
Figure 6 IR/FT spectra of kanemite: Si/Na = 1 ( left ) and Si/(Na+NH 4 ) = 1 ( right ).
Image
19 F(SP) MAS NMR spectra of <b>kanemite</b>: ( a ) Si&#x2F;Na = 1 and ( b ) Si&#x2F;(Na+NH 4...
Published: 01 May 2013
Figure 7 19 F(SP) MAS NMR spectra of kanemite: ( a ) Si/Na = 1 and ( b ) Si/(Na+NH 4 ) = 1. * = spinning side bands.
Image
23 Na MQ MAS NMR spectra of K01 <b>kanemite</b>.
Published: 01 May 2013
Figure 8 23 Na MQ MAS NMR spectra of K01 kanemite.
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The structure of the layered sodium silicate <b>kanemite</b> consisting of monolay...
Published: 01 June 2012
Fig. 2 The structure of the layered sodium silicate kanemite consisting of monolayers with terminal silanol/siloxy groups and bands of [Na(H 2 O) 6 ] + octahedra interconnected via common edges, Si (small spheres), O (large spheres), Na(H 2 O) 6 (tabezoids), the terminal O atoms represent OH
Image
XRD patterns of <b>kanemite</b>, kaolinite, pyrophyllite, and talc: (a) starting m...
Published: 01 August 2010
Figure 1. XRD patterns of kanemite, kaolinite, pyrophyllite, and talc: (a) starting materials, and after hydrothermal treatment at 300°C for 48 h in two different chemical media; (b) water; and (c) 0.01 M HNO 3 solution. C = cristobalite, T = tridymite, and b = boehmite.
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29 Si MAS NMR spectra and fits of <b>kanemite</b>, kaolinite, pyrophyllite, and ta...
Published: 01 August 2010
Figure 2. 29 Si MAS NMR spectra and fits of kanemite, kaolinite, pyrophyllite, and talc: (a) starting materials, and after hydrothermal treatment at 300°C for 48 h in two different chemical media; (b) water; and (c) 0.01 M HNO 3 solution.
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SEM images and EDX spectra of <b>kanemite</b>: (a,d) starting material, and after ...
Published: 01 August 2010
Figure 3. SEM images and EDX spectra of kanemite: (a,d) starting material, and after hydrothermal treatment at 300°C for 48 h in two different chemical media; (b,e) water; and (c,f) 0.01 M HNO 3 solution.