Investigation of cation order in MgSiO3-rich garnet using 29Si and 27Al MAS NMR spectroscopy

B. L. Phillips; D. A. Howell; R. J. Kirkpatrick; T. Gasparik

Investigation of cation order in MgSiO₃-rich garnet using ²⁹Si and ²⁷Al MAS NMR spectroscopy

B. L. Phillips
, D. A. Howell
, R. J. Kirkpatrick
, T. Gasparik

Geosciences

University of Illinois at Urbana-Champaign

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

34 Scopus citations

Abstract

Cation order among the octahedral sites of three polycrystalline ²⁹Si-enriched garnets on the enstatite-pyrope join has been examined using ²⁹Si and ²⁷Al MAS NMR spectroscopy. All three samples yielded ²⁹Si NMR peaks in the chemical shift range of -68 to -90 ppm, caused by ^[4]Si, and a peak between -195.6 and -197.5 ppm, caused by ^[6]Si. The ^[4]Si/^[6]Si ratios are consistent with the compositions. The changes in the ²⁹Si chemical shifts for ^[4]Si with substitution of Mg for Si on the NNN octahedral sites are pairwise rather than directly additive. -from Authors

Original language	English
Pages (from-to)	704-712
Number of pages	9
Journal	American Mineralogist
Volume	77
Issue number	7-8
State	Published - 1992

Cite this

@article{4c9119f828fb40af89403062a20b3f23,

title = "Investigation of cation order in MgSiO3-rich garnet using 29Si and 27Al MAS NMR spectroscopy",

abstract = "Cation order among the octahedral sites of three polycrystalline 29Si-enriched garnets on the enstatite-pyrope join has been examined using 29Si and 27Al MAS NMR spectroscopy. All three samples yielded 29Si NMR peaks in the chemical shift range of -68 to -90 ppm, caused by [4]Si, and a peak between -195.6 and -197.5 ppm, caused by [6]Si. The [4]Si/[6]Si ratios are consistent with the compositions. The changes in the 29Si chemical shifts for [4]Si with substitution of Mg for Si on the NNN octahedral sites are pairwise rather than directly additive. -from Authors",

author = "Phillips, \{B. L.\} and Howell, \{D. A.\} and Kirkpatrick, \{R. J.\} and T. Gasparik",

year = "1992",

language = "English",

volume = "77",

pages = "704--712",

journal = "American Mineralogist",

issn = "0003-004X",

number = "7-8",

}

TY - JOUR

T1 - Investigation of cation order in MgSiO3-rich garnet using 29Si and 27Al MAS NMR spectroscopy

AU - Phillips, B. L.

AU - Howell, D. A.

AU - Kirkpatrick, R. J.

AU - Gasparik, T.

PY - 1992

Y1 - 1992

N2 - Cation order among the octahedral sites of three polycrystalline 29Si-enriched garnets on the enstatite-pyrope join has been examined using 29Si and 27Al MAS NMR spectroscopy. All three samples yielded 29Si NMR peaks in the chemical shift range of -68 to -90 ppm, caused by [4]Si, and a peak between -195.6 and -197.5 ppm, caused by [6]Si. The [4]Si/[6]Si ratios are consistent with the compositions. The changes in the 29Si chemical shifts for [4]Si with substitution of Mg for Si on the NNN octahedral sites are pairwise rather than directly additive. -from Authors

AB - Cation order among the octahedral sites of three polycrystalline 29Si-enriched garnets on the enstatite-pyrope join has been examined using 29Si and 27Al MAS NMR spectroscopy. All three samples yielded 29Si NMR peaks in the chemical shift range of -68 to -90 ppm, caused by [4]Si, and a peak between -195.6 and -197.5 ppm, caused by [6]Si. The [4]Si/[6]Si ratios are consistent with the compositions. The changes in the 29Si chemical shifts for [4]Si with substitution of Mg for Si on the NNN octahedral sites are pairwise rather than directly additive. -from Authors

UR - https://www.scopus.com/pages/publications/0027061951

M3 - Article

AN - SCOPUS:0027061951

SN - 0003-004X

VL - 77

SP - 704

EP - 712

JO - American Mineralogist

JF - American Mineralogist

IS - 7-8

ER -

Investigation of cation order in MgSiO₃-rich garnet using ²⁹Si and ²⁷Al MAS NMR spectroscopy

Abstract

Other files and links

Fingerprint

Cite this