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Journal Article

The effect of polymorphic structure on the structural and chemical stability of yttrium disilicates Available to Purchase

Evgeny Galunin, Miquel Vidal, María D. Alba
Published: 01 October 2011
American Mineralogist (2011) 96 (10): 1512–1520.
DOI: https://doi.org/10.2138/am.2011.3659
...Evgeny Galunin; Miquel Vidal; María D. Alba Abstract Under pressure and temperature conditions like those found in deep geological repositories (DGRs), rare-earth cations may react with silicates to form rare-earth disilicates. This study establishes the stability range of yttrium disilicates...
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View PDF for article title, The effect of polymorphic structure on the structural and chemical stability of yttrium <span class="search-highlight">disilicates</span>
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Journal Article

Chemical and structural study of the Zr,Ti-disilicates in the venanzite from Pian di Celle, Umbria, Italy Available to Purchase

Marco BELLEZZA, Stefano MERLINO, Natale PERCHIAZZI
Published: 01 November 2004
European Journal of Mineralogy (2004) 16 (6): 957–969.
DOI: https://doi.org/10.1127/0935-1221/2004/0016-0957
...-mail: [email protected] 21 06 2004 14 10 2003 23 02 2004 E. Schweizerbart'sche Verlagsbuchhandlung, D-70176 Stuttgart 2004 cuspidine götzenite microprobe chemical data single-crystal X-ray diffractometry crystal structure Rare Zr-Ti-Nb disilicates are typical...
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View PDF for article title, Chemical and structural study of the Zr,Ti-<span class="search-highlight">disilicates</span> in the venanzite from Pian di Celle, Umbria, Italy
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Journal Article

Zr-Ti disilicates from the Pian di Celle Volcano, Umbria, Italy Available to Purchase

Victor V. Sharygin, Francesco Stoppa, Boris A. Kolesov
Published: 01 October 1996
European Journal of Mineralogy (1996) 8 (5): 1199–1212.
View PDF for article title, Zr-Ti <span class="search-highlight">disilicates</span> from the Pian di Celle Volcano, Umbria, Italy
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Journal Article

Polymorphism in barium disilicate Available to Purchase

Robert S. Roth, Ernest M. Levin
Published: 01 April 1959
American Mineralogist (1959) 44 (3-4): 452–453.
...Robert S. Roth; Ernest M. Levin Abstract The question of polymorphism in barium disilicate has recently been discussed in this journal by R. M. Douglass (1958). Although Rogers (1932) postulated dimorphism of BaSi 2 O 5 in order to reconcile his optical data with those of Bowen (1918) and Escola...
View PDF for article title, Polymorphism in barium <span class="search-highlight">disilicate</span>
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Journal Article

The Ericssonite Group of Fe 3+ Disilicate Minerals Available to Purchase

Elena Sokolova, Frank C. Hawthorne, Fernando CÁmara, Malcolm E. Back
Published: 30 January 2018
The Canadian Mineralogist (2018) 56 (1): 95–99.
DOI: https://doi.org/10.3749/canmin.1700064
...Elena Sokolova; Frank C. Hawthorne; Fernando CÁmara; Malcolm E. Back Abstract The ericssonite group contains two Fe 3+ disilicates with the ericssonite structure-type arrangement: ericssonite, BaMn 2 Fe 3+ (Si 2 O 7 )O(OH), and ferroericssonite, BaFe 2+ 2 Fe 3+ (Si 2 O 7 )O(OH) (Memorandum 78-SM/17...
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View PDF for article title, The Ericssonite Group of Fe 3+ <span class="search-highlight">Disilicate</span> Minerals
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Journal Article

Percleveite-(Ce) — a new lanthanide disilicate mineral from Bastnäs, Skinnskatteberg, Sweden Available to Purchase

Dan HOLTSTAM, Rolf NORRESTAM, Ulf B. ANDERSSON
Published: 01 July 2003
European Journal of Mineralogy (2003) 15 (4): 725–731.
DOI: https://doi.org/10.1127/0935-1221/2003/0015-0725
... to be isostructural with the synthetic, low-temperature lanthanide disilicates (general formula Ln 2 Si 2 O 7 ) with tetragonal symmetry (space group P 4 1 ). Unit-cell parameters are a = 6.7805(8) and c = 24.689(4) Å (refined from powder data) with Z = 8. The structure has been refined from single crystal data...
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View PDF for article title, Percleveite-(Ce) — a new lanthanide <span class="search-highlight">disilicate</span> mineral from Bastnäs, Skinnskatteberg, Sweden
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Journal Article

FROM STRUCTURE TOPOLOGY TO CHEMICAL COMPOSITION. I. STRUCTURAL HIERARCHY AND STEREOCHEMISTRY IN TITANIUM DISILICATE MINERALS Available to Purchase

Elena Sokolova
Published: 01 December 2006
The Canadian Mineralogist (2006) 44 (6): 1273–1330.
DOI: https://doi.org/10.2113/gscanmin.44.6.1273
...Elena Sokolova Abstract The structural hierarchy and stereochemistry have been considered for 24 titanium disilicate minerals that contain the TS (Titanium Silicate) block, a central trioctahedral (O) sheet, and two adjacent (H) sheets of [5]- and [6]-coordinated polyhedra and (Si 2 O 7 ) groups...
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View PDF for article title, FROM STRUCTURE TOPOLOGY TO CHEMICAL COMPOSITION. I. STRUCTURAL HIERARCHY AND STEREOCHEMISTRY IN TITANIUM <span class="search-highlight">DISILICATE</span> MINERALS
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Journal Article

Formation at 300 degrees C of a high-temperature disilicate from hydrated lutetium in a layered aluminosilicate Free

M. A. Castro, M. D. Alba, R. Alvero, A. I. Becerro, A. Munoz-Paez, J. M. Trillo
Journal: Clay Minerals
Published: 01 December 1996
Clay Minerals (1996) 31 (4): 507–512.
View PDF for article title, Formation at 300 degrees C of a high-temperature <span class="search-highlight">disilicate</span> from hydrated lutetium in a layered aluminosilicate
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Journal Article

Potassium hydrogen disilicate: A possible model compound for 17 O NMR spectra of hydrous silicate glasses Available to Purchase

Jane V. Oglesby, Scott Kroeker, Jonathan F. Stebbins
Published: 01 March 2001
American Mineralogist (2001) 86 (3): 341–347.
DOI: https://doi.org/10.2138/am-2001-2-318
... on crystalline potassium hydrogen disilicate (KHSi 2 O 5 ) and hydrous and anhydrous potassium tetrasilicate (K 2 Si 4 O 9 ), sanidine (KAlSi 3 O 8 ), and haplogranite (KAlSi 3 O 8 -NaAlSi 3 O 8 -SiO 2 ) glasses. Crystalline KHSi 2 O 5 has two bridging oxygen sites and one non-bridging oxygen site, and the NMR...
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View PDF for article title, Potassium hydrogen <span class="search-highlight">disilicate</span>: A possible model compound for 17 O NMR spectra of hydrous silicate glasses
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Area of enthalpy and volume hysteresis of densified sodium disilicates in numerical cooling/heating cycles performed in NPT Ensemble as a function of constraint density (Bauchy and Micoulaut 2015). Reprinted figure with permission from B. Mantisi, M. Bauchy, and M. Micoulaut, Phys. Rev. B 92:134201 (2015). Copyright (2015) by the American Physical Society.

Area of enthalpy and volume hysteresis of densified sodium disilicates in n... Available to Purchase

Published: 01 May 2022
Figure 10. Area of enthalpy and volume hysteresis of densified sodium disilicates in numerical cooling/heating cycles performed in NPT Ensemble as a function of constraint density ( Bauchy and Micoulaut 2015 ). Reprinted figure with permission from B. Mantisi, M. Bauchy, and M. Micoulaut, Phys
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(a), (b), and (c). Chemical composition of the F-disilicates in the Passa Quatro nepheline syenites and phonolite. The reference compositions (black diamonds) are those in the Handbook of Mineralogy (names underlined). Reference compositions are from the Phlegrean Fields (Melluso et al. 2012), Ischia (Melluso et al. 2014), Gharyan (Lustrino et al. 2012), Itatiaia (Melluso et al. 2017), and Sushina Hill (Chakrabarty et al. 2018). The reference compositions of the Oslo Rift nepheline syenites are taken from Andersen et al. (2010, 2012a, b). The structural formulae were calculated assuming Si + Al = 8 cations per formula unit.

(a), (b), and (c). Chemical composition of the F-disilicates in the Passa Q... Available to Purchase

Published: 16 May 2019
Fig. 6. (a), (b), and (c). Chemical composition of the F-disilicates in the Passa Quatro nepheline syenites and phonolite. The reference compositions (black diamonds) are those in the Handbook of Mineralogy (names underlined). Reference compositions are from the Phlegrean Fields ( Melluso et al
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REPRESENTATIVE COMPOSITIONS OF F-DISILICATES ANALYZED IN THE PASSA QUATRO R... Available to Purchase

Published: 16 May 2019
TABLE 4. REPRESENTATIVE COMPOSITIONS OF F-DISILICATES ANALYZED IN THE PASSA QUATRO ROCKS
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(a) Mn# phases versus Mn# bulk-rock diagram with F-disilicates, eudialyte, kupletskite, and astrophyllite and the corresponding bulk-rock compositions. While pyroxenes and amphiboles have roughly the same Mn# as the host rocks, the other phases have much higher Mn# than the bulk-rock, hence they can fractionate the Mn# in more evolved melts. (b) FeOt (wt.%) versus Mn# bulk-rock diagram showing the variation of bulk-rock compositions in Passa Quatro nepheline syenites and phonolites.

(a) Mn# phases versus Mn# bulk-rock diagram with F-disilicates, eudialyte... Available to Purchase

Published: 16 May 2019
Fig. 7. (a) Mn# phases versus Mn# bulk-rock diagram with F-disilicates, eudialyte, kupletskite, and astrophyllite and the corresponding bulk-rock compositions. While pyroxenes and amphiboles have roughly the same Mn# as the host rocks, the other phases have much higher Mn# than the bulk-rock
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Composition of wöhlerite and related Na–Ca–(Zr,Ti,Nb)-disilicates (låvenite, burpalite, hiortdahlite, and rosenbuschite). Star symbols represent endmember compositions. Black circles = wöhlerite from other localities (Eggleton et al. 1979, Mariano &amp; Roeder 1989, Keller et al. 1995, Chao &amp; Gault 1997, Perchiazzi et al. 2000, Robles et al. 2001, Andersen et al. 2010, and Melluso et al. 2017).

Composition of wöhlerite and related Na–Ca–(Zr,Ti,Nb)-disilicates (låvenite... Available to Purchase

Published: 23 October 2018
Fig. 3. Composition of wöhlerite and related Na–Ca–(Zr,Ti,Nb)-disilicates (låvenite, burpalite, hiortdahlite, and rosenbuschite). Star symbols represent endmember compositions. Black circles = wöhlerite from other localities ( Eggleton et al . 1979 , Mariano & Roeder 1989 , Keller et al
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Composition of the F-disilicates in the Itatiaia peralkaline nepheline syenites.

Composition of the F-disilicates in the Itatiaia peralkaline nepheline syen... Available to Purchase

Published: 01 April 2017
Fig. 8. Composition of the F-disilicates in the Itatiaia peralkaline nepheline syenites.
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Comparison of Raman spectra of selected disilicates.

Comparison of Raman spectra of selected disilicates. Available to Purchase

Published: 01 February 2010
F ig . 9. Comparison of Raman spectra of selected disilicates.
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RAMAN BANDS (cm −1 ) OF SELECTED DISILICATES, AND TENTATIVE BAND-ASSIGNMENT... Available to Purchase

Published: 01 February 2010
TABLE 12. RAMAN BANDS (cm −1 ) OF SELECTED DISILICATES, AND TENTATIVE BAND-ASSIGNMENTS
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“Face-sharing” disilicate units extending parallel to a are characteristic of the refined average structure. In the true structure only each second disilicate group is occupied.

“Face-sharing” disilicate units extending parallel to a are characteristi... Available to Purchase

Published: 01 October 2011
Fig. 5. “Face-sharing” disilicate units extending parallel to a are characteristic of the refined average structure. In the true structure only each second disilicate group is occupied.
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Compilation of the density data measured in this study as a function of temperature, together with the densities of pure Na-disilicate from Courtial et al. (1999, solid diamonds). The full circles and squares represent the densities of Na-disilicate melts containing 5 and 10 wt% of cerium oxide, respectively, and the grey circles and squares represent the densities of Na-disilicate melts containing 5 and 25 wt% of the other lanthanide oxides, respectively. The error bars correspond to the standard deviation of the replicate density calculated using Equation 1.

Compilation of the density data measured in this study as a function of tem... Available to Purchase

Published: 01 October 2005
F igure 1. Compilation of the density data measured in this study as a function of temperature, together with the densities of pure Na-disilicate from Courtial et al. (1999 , solid diamonds). The full circles and squares represent the densities of Na-disilicate melts containing 5 and 10 wt
Journal Article

THE CRYSTAL STRUCTURES OF THREE NEW COMPLEX SILICATES OF SCANDIUM Available to Purchase

Maria Wierzbicka-Wieczorek, Uwe Kolitsch, Ekkehart Tillmanns
Published: 01 February 2010
The Canadian Mineralogist (2010) 48 (1): 51–68.
DOI: https://doi.org/10.3749/canmin.48.1.51
...F ig . 9. Comparison of Raman spectra of selected disilicates. ...
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