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trisilicates

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Journal Article
Published: 01 March 2010
European Journal of Mineralogy (2010) 22 (2): 245–258.
...Maria Wierzbicka-Wieczorek; Uwe Kolitsch; Ekkehart Tillmanns Abstract Five new mixed-framework trisilicates were synthesised using a high-temperature flux growth technique. Colourless, glassy plates of SrY 2 Si 3 O 10 crystallise in space group P 1̅, with a = 6.757(1), b = 6.885(1), c = 9.273(2) Å...
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Journal Article
Published: 01 June 1977
American Mineralogist (1977) 62 (5-6): 503–512.
...–O bond lengths is 0.002A. The crystal structure of rosenhahnite consists of Ca(1)O 7 , Ca(2)O 6 , and Ca(3)O 7 polyhedra and insular [Si 3 O 8 (OH) 2 ] groups. The trisilicate group with point symmetry 1 consists of a central SiO 4 tetrahedron sharing corners with two adjacent SiO 3 (OH) tetrahedra...
Image
Comparison of Si 3 O 10  arrangements in other selected <b>trisilicates</b>: a) Na...
Published: 01 March 2010
Fig. 9. Comparison of Si 3 O 10 arrangements in other selected trisilicates: a) Na 2 Ca 3 (Si 3 O 10 ), b) SrY 2 (Si 3 O 10 ), c) Na 4 Cd 2 (Si 3 O 10 ), d) kilchoanite, Ca 6 (Si 3 O 10 )(SiO 4 ), e) BaGd 2 (Si 3 O 10 ), f) SrYb 4 (Si 2 O 7 )(Si 3 O 10 ), g) kinoite, Cu 2 Ca 2 Si 3 O 10 (H 2 O
Journal Article
Published: 01 April 2012
American Mineralogist (2012) 97 (4): 503–512.
...%. Pavlovskyite represents a 1:1 member of a polysomatic series with calcio-olivine γ-Ca 2 SiO 4 and kilchoanite Ca 6 (SiO 4 )(Si 3 O 10 ) as end-member modules. The structure is characterized by strongly folded trisilicate units (Si 3 O 10 ) interwoven with a framework of CaO 6 and CaO 8 polyhedra. Olivine-like...
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Journal Article
Published: 01 June 2006
The Canadian Mineralogist (2006) 44 (3): 731–753.
...François Farges; Ralf Siewert; Gordon E. Brown, Jr.; Anne Guesdon; Guillaume Morin Abstract The coordination chemistry of molybdenum was investigated in nine series of synthetic silicate glasses, including sodium disilicate (NS2), sodium trisilicate (NS3), albite (Ab), anorthite (An), Ab 50 An 50...
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Journal Article
Published: 01 November 2000
European Journal of Mineralogy (2000) 12 (6): 1093–1107.
...François FARGES; Stéphanie ROSSANO Abstract The local environment of ∼ 1400 ppm Zr in hydrous synthetic glasses (sodium trisilicate and albitic) has been probed at the Zr K-edge by X-ray Absorption Fine Structure (XAFS) spectroscopy and compared to that for natural glasses (volcanic and tektites...
FIGURES | View All (5)
Image
View of zigzag chains and horseshoe-shaped <b>trisilicate</b> (Si 3 O 10 ) unit in...
Published: 01 March 2010
Fig. 3. View of zigzag chains and horseshoe-shaped trisilicate (Si 3 O 10 ) unit in BaREE 2 (Si 3 O 10 ) (REE = Gd, Y, Er, Yb, Sc) along [100].
Image
(a): Zr K-edge high-resolution XANES spectra for sodium <b>trisilicate</b> (NS3) g...
Published: 01 November 2000
Fig. 2. (a): Zr K-edge high-resolution XANES spectra for sodium trisilicate (NS3) glasses with 2000 ppm Zr synthesised at 5 kbar, containing 0.3, 3.0, 4.4 and 8.2 wt.% water. The insets show details of the pre-edge feature (A) and the edge crest (features B and C). Features A-D are little
Image
The crystal structure of a new sodium <b>trisilicate</b>.
Published: 01 January 2000
Figure 12. The crystal structure of a new sodium trisilicate.
Journal Article
Published: 08 January 2021
The Canadian Mineralogist (2021) 59 (1): 91–105.
... are bridged by disilicate (Si 2 O 7 ) and trisilicate (Si 3 O 10 ) groups, yielding a framework. Cavities within this framework contain two large cation sites. The structure of demagistrisite can be considered transitional between the structures of orientite and noelbensonite. Demagistrisite is named in honor...
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Journal Article
Published: 01 December 2013
European Journal of Mineralogy (2013) 25 (4): 509–517.
... in the ratio 2:1 and is isotypic with (NH 4 )Cd 6 (P 2 O 7 ) 2 (P 3 O 10 ). Its framework topology is characterised by one horseshoe-shaped trisilicate (Si 3 O 10 ) group, two symmetrically equivalent (Si 2 O 7 ) groups with the Si–O–Si angle of 165.3° and staggered conformation, and zigzag chains of edge...
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Journal Article
Published: 01 February 2004
American Mineralogist (2004) 89 (2-3): 396–404.
... = 83.977(2), β = 88.074(2), γ = 87.846(2)°, V = 755.8 Å 3 , and D x = 6.830 g/cm 3 . The type-L structure comprises linear trisilicate [Si 3 O 10 ] 8− and orthosilicate [SiO 4 ] 4− ions cross linked by REE 3+ in one sevenfold and five eightfold coordinated positions (to 3.0 Å), and is assembled from...
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Journal Article
Published: 01 April 2003
American Mineralogist (2003) 88 (4): 694–700.
... and environmental interest, including sodium trisilicate glass and an aqueous chloride solution, at the Mo K and Au L III edges, respectively. Further studies based on CCWT phase terms are underway, in order to quantitatively characterize anharmonic information from EXAFS contributions. * E-mail: munoz...
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Journal Article
Published: 01 October 1980
American Mineralogist (1980) 65 (9-10): 947–952.
... feature is the presence of an arsenatotrisilicate ion (AsSi 3 O 12 OH) 8− , comprising four tetrahedra linked together to form a chain fragment. This new ion is an extension of the trisilicate (Si 3 O 10 ) 8− ion with an additional As-centered tetrahedron linked to it. This example is the first of a new...
Journal Article
Published: 01 June 2011
European Journal of Mineralogy (2011) 23 (3): 425–435.
... ): Synthesis and structural study of five new trisilicates, BaREE 2 Si 3 O 10 (REE = Gd, Er, Yb, Sc) and SrY 2 Si 3 O 10 , including a review on the geometry of the Si 3 O 10 unit. Eur. J. Mineral. , 22 , 245 –258. Yang, H., Konzett, J., Prewitt, C.T. ( 2001 ): Crystal structure of phase X, a high...
FIGURES | View All (7)
Image
Detail of the local environments of the triple silicate groups in demagistr...
Published: 08 January 2021
Fig. 6. Detail of the local environments of the triple silicate groups in demagistrisite. Approximately 7% of the trisilicate groups are substituted by a local “ardennite-like” structure with a further tetrahedra (in cyan) outside of the trisilicate group and the Si3 tetrahedron substituted
Image
View of BaYb 6 (Si 2 O 7 ) 2 (Si 3 O 10 ) along [100], showing the zigzag c...
Published: 01 December 2013
Fig. 2 View of BaYb 6 (Si 2 O 7 ) 2 (Si 3 O 10 ) along [100], showing the zigzag chains and the di- and trisilicate groups in the ratio 2:1. The unit cell is outlined, c * = c sinβ.
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Crystal structure of BaY 4 (Si 2 O 7 )(Si 3 O 10 ) ( Wierzbicka-Wieczorek, ...
Published: 01 December 2013
Fig. 4 Crystal structure of BaY 4 (Si 2 O 7 )(Si 3 O 10 ) ( Wierzbicka-Wieczorek, 2007 ) along [100], showing the zigzag chains and the di- and trisilicate groups in the ratio 1:1, c * = c sinβ. Compare Fig. 2 .
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Molybdenum K-edge XANES spectra for dry and H 2 O-bearing densified felsdpa...
Published: 01 June 2006
F ig . 4. Molybdenum K-edge XANES spectra for dry and H 2 O-bearing densified felsdpathic glasses (a) and sodium trisilicate glasses (b). Changes in the pre-edge feature (A) are observed only in NS3 glasses and are attributed to the presence of Mo(IV) moieties.
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Molybdenum K-edge-normalized, k 3 -weighted EXAFS spectra (a) (solid: exper...
Published: 01 June 2006
F ig . 5. Molybdenum K-edge-normalized, k 3 -weighted EXAFS spectra (a) (solid: experimental; dotted: calculated model) and their corresponding Fourier-transforms (b) for various dry and hydrous densified feldpathoidal and sodium trisilicate glasses. No splitting of features in the FT