High-pressure synthetic (Na0.97Mg0.03)(Mg0.43Fe0.173+Si0.40)Si2O6, with six-coordinated silicon, isostructural with P2/n omphacite
The title compound, (sodium magnesium) [magnesium iron(III) silicon] disilicate, (Na0.97Mg0.03)(Mg0.43Fe0.173+Si0.40)Si2O6, is isotypic with ordered P2/n omphacite. Its structure is characterized by single chains of corner-sharing SiO4 tetrahedra, extending along the c axis, which are crosslinked by...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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International Union of Crystallography
2012-02-01
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| Series: | Acta Crystallographica Section E |
| Online Access: | http://scripts.iucr.org/cgi-bin/paper?S1600536812002966 |
| _version_ | 1819288988490399744 |
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| author | Esther S. Posner Jürgen Konzett Daniel J. Frost Robert T. Downs Hexiong Yang |
| author_facet | Esther S. Posner Jürgen Konzett Daniel J. Frost Robert T. Downs Hexiong Yang |
| author_sort | Esther S. Posner |
| collection | DOAJ |
| description | The title compound, (sodium magnesium) [magnesium iron(III) silicon] disilicate, (Na0.97Mg0.03)(Mg0.43Fe0.173+Si0.40)Si2O6, is isotypic with ordered P2/n omphacite. Its structure is characterized by single chains of corner-sharing SiO4 tetrahedra, extending along the c axis, which are crosslinked by bands of edge-sharing octahedra (site symmetry 2), statistically occupied by (Mg2+ + Fe3+ + Si4+). Between the bands built up of the octahedra are two non-equivalent highly distorted six-coordinated sites (site symmetry 2), statistically occupied by (Na + Mg). In contrast to omphacites, the great differences in size and charge between Mg2+ and Si4+ result in complete, rather than partial, ordering of Mg and Si into two distinct octahedral sites, whereas Fe3+ is disordered between the two sites. The octahedron filled by (Mg + Fe) is larger and markedly more distorted than that occupied by (Si + Fe). The average (Mg + Fe)—O and (VISi + Fe)—O bond lengths are 2.075 and 1.850 Å, respectively. |
| first_indexed | 2024-12-24T02:59:42Z |
| format | Article |
| id | doaj.art-5c4939e0583f4c9e91c0f950060d222c |
| institution | Directory Open Access Journal |
| issn | 1600-5368 |
| language | English |
| last_indexed | 2024-12-24T02:59:42Z |
| publishDate | 2012-02-01 |
| publisher | International Union of Crystallography |
| record_format | Article |
| series | Acta Crystallographica Section E |
| spelling | doaj.art-5c4939e0583f4c9e91c0f950060d222c2022-12-21T17:18:15ZengInternational Union of CrystallographyActa Crystallographica Section E1600-53682012-02-01682i18i1810.1107/S1600536812002966High-pressure synthetic (Na0.97Mg0.03)(Mg0.43Fe0.173+Si0.40)Si2O6, with six-coordinated silicon, isostructural with P2/n omphaciteEsther S. PosnerJürgen KonzettDaniel J. FrostRobert T. DownsHexiong YangThe title compound, (sodium magnesium) [magnesium iron(III) silicon] disilicate, (Na0.97Mg0.03)(Mg0.43Fe0.173+Si0.40)Si2O6, is isotypic with ordered P2/n omphacite. Its structure is characterized by single chains of corner-sharing SiO4 tetrahedra, extending along the c axis, which are crosslinked by bands of edge-sharing octahedra (site symmetry 2), statistically occupied by (Mg2+ + Fe3+ + Si4+). Between the bands built up of the octahedra are two non-equivalent highly distorted six-coordinated sites (site symmetry 2), statistically occupied by (Na + Mg). In contrast to omphacites, the great differences in size and charge between Mg2+ and Si4+ result in complete, rather than partial, ordering of Mg and Si into two distinct octahedral sites, whereas Fe3+ is disordered between the two sites. The octahedron filled by (Mg + Fe) is larger and markedly more distorted than that occupied by (Si + Fe). The average (Mg + Fe)—O and (VISi + Fe)—O bond lengths are 2.075 and 1.850 Å, respectively.http://scripts.iucr.org/cgi-bin/paper?S1600536812002966 |
| spellingShingle | Esther S. Posner Jürgen Konzett Daniel J. Frost Robert T. Downs Hexiong Yang High-pressure synthetic (Na0.97Mg0.03)(Mg0.43Fe0.173+Si0.40)Si2O6, with six-coordinated silicon, isostructural with P2/n omphacite Acta Crystallographica Section E |
| title | High-pressure synthetic (Na0.97Mg0.03)(Mg0.43Fe0.173+Si0.40)Si2O6, with six-coordinated silicon, isostructural with P2/n omphacite |
| title_full | High-pressure synthetic (Na0.97Mg0.03)(Mg0.43Fe0.173+Si0.40)Si2O6, with six-coordinated silicon, isostructural with P2/n omphacite |
| title_fullStr | High-pressure synthetic (Na0.97Mg0.03)(Mg0.43Fe0.173+Si0.40)Si2O6, with six-coordinated silicon, isostructural with P2/n omphacite |
| title_full_unstemmed | High-pressure synthetic (Na0.97Mg0.03)(Mg0.43Fe0.173+Si0.40)Si2O6, with six-coordinated silicon, isostructural with P2/n omphacite |
| title_short | High-pressure synthetic (Na0.97Mg0.03)(Mg0.43Fe0.173+Si0.40)Si2O6, with six-coordinated silicon, isostructural with P2/n omphacite |
| title_sort | high pressure synthetic na0 97mg0 03 mg0 43fe0 173 si0 40 si2o6 with six coordinated silicon isostructural with p2 n omphacite |
| url | http://scripts.iucr.org/cgi-bin/paper?S1600536812002966 |
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