Stability and structure of a new high-pressure silicate, Na1.8 Ca1.1Si6O14

T. Gasparik; J. B. Parise; B. A. Eiben; J. A. Hriljac

Stability and structure of a new high-pressure silicate, Na1.8 Ca1.1Si6O14

T. Gasparik, J. B. Parise, B. A. Eiben, J. A. Hriljac

Research output: Contribution to journal › Article › peer-review

37 Citations (Scopus)

Abstract

Preliminary phase relations for the bulk composition Na₂O.CaO.5SiO₂ were experimentally determined at 8-16 GPa and 950-2300°C, using a split-sphere anvil apparatus (USSA-2000). The dominant phase at pressures between 8 and 14 GPa was a new compound with the ideal formula Na₂CaSi₆O₁₄. Two independent sets of X-ray diffraction data were collected on different crystals from the same batch: one with a conventional diffractometer and the other using imaging plates and a synchrotron X-ray source. The compound crystallizes in space group P321 with a = 7.903(2) and c = 4.595(1) Å. Its structure consists of layers in (001); one is centered at z = 0 and contains the (Ca,Na) and ^[6]Si sites. The other, centered at z = 1/2 , is a sheet of corner-linked ^[4]Si tetrahedra composed of open-branched crankshaft vierer chains linked by single tetrahedra. -from Authors

Original language	English
Pages (from-to)	1269-1276
Number of pages	8
Journal	American Mineralogist
Volume	80
Issue number	11-12
Publication status	Published - 1995
Externally published	Yes

ASJC Scopus subject areas

Geochemistry and Petrology
Geophysics

Cite this

@article{c16a979c2c264d71b22d951cf546f96e,

title = "Stability and structure of a new high-pressure silicate, Na1.8 Ca1.1Si6O14",

abstract = "Preliminary phase relations for the bulk composition Na2O.CaO.5SiO2 were experimentally determined at 8-16 GPa and 950-2300°C, using a split-sphere anvil apparatus (USSA-2000). The dominant phase at pressures between 8 and 14 GPa was a new compound with the ideal formula Na2CaSi6O14. Two independent sets of X-ray diffraction data were collected on different crystals from the same batch: one with a conventional diffractometer and the other using imaging plates and a synchrotron X-ray source. The compound crystallizes in space group P321 with a = 7.903(2) and c = 4.595(1) {\AA}. Its structure consists of layers in (001); one is centered at z = 0 and contains the (Ca,Na) and [6]Si sites. The other, centered at z = 1/2 , is a sheet of corner-linked [4]Si tetrahedra composed of open-branched crankshaft vierer chains linked by single tetrahedra. -from Authors",

author = "T. Gasparik and Parise, {J. B.} and Eiben, {B. A.} and Hriljac, {J. A.}",

year = "1995",

language = "English",

volume = "80",

pages = "1269--1276",

journal = "American Mineralogist",

issn = "0003-004X",

publisher = "Mineralogical Society of America",

number = "11-12",

}

TY - JOUR

T1 - Stability and structure of a new high-pressure silicate, Na1.8 Ca1.1Si6O14

AU - Gasparik, T.

AU - Parise, J. B.

AU - Eiben, B. A.

AU - Hriljac, J. A.

PY - 1995

Y1 - 1995

N2 - Preliminary phase relations for the bulk composition Na2O.CaO.5SiO2 were experimentally determined at 8-16 GPa and 950-2300°C, using a split-sphere anvil apparatus (USSA-2000). The dominant phase at pressures between 8 and 14 GPa was a new compound with the ideal formula Na2CaSi6O14. Two independent sets of X-ray diffraction data were collected on different crystals from the same batch: one with a conventional diffractometer and the other using imaging plates and a synchrotron X-ray source. The compound crystallizes in space group P321 with a = 7.903(2) and c = 4.595(1) Å. Its structure consists of layers in (001); one is centered at z = 0 and contains the (Ca,Na) and [6]Si sites. The other, centered at z = 1/2 , is a sheet of corner-linked [4]Si tetrahedra composed of open-branched crankshaft vierer chains linked by single tetrahedra. -from Authors

AB - Preliminary phase relations for the bulk composition Na2O.CaO.5SiO2 were experimentally determined at 8-16 GPa and 950-2300°C, using a split-sphere anvil apparatus (USSA-2000). The dominant phase at pressures between 8 and 14 GPa was a new compound with the ideal formula Na2CaSi6O14. Two independent sets of X-ray diffraction data were collected on different crystals from the same batch: one with a conventional diffractometer and the other using imaging plates and a synchrotron X-ray source. The compound crystallizes in space group P321 with a = 7.903(2) and c = 4.595(1) Å. Its structure consists of layers in (001); one is centered at z = 0 and contains the (Ca,Na) and [6]Si sites. The other, centered at z = 1/2 , is a sheet of corner-linked [4]Si tetrahedra composed of open-branched crankshaft vierer chains linked by single tetrahedra. -from Authors

UR - http://www.scopus.com/inward/record.url?scp=0029478190&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0029478190

SN - 0003-004X

VL - 80

SP - 1269

EP - 1276

JO - American Mineralogist

JF - American Mineralogist

IS - 11-12

ER -

Stability and structure of a new high-pressure silicate, Na1.8 Ca1.1Si6O14

Abstract

ASJC Scopus subject areas

Fingerprint

Cite this