Reference Type | Journal (article/letter/editorial) |
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Title | Infrared spectra of synthetic almandine–grossular and almandine–pyrope garnet solid solutions: evidence for equivalent site behaviour |
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Journal | Mineralogical Magazine | ISSN | 0026-461X |
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Authors | Geiger, C. A. | Author |
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Winkler, B. | Author |
Langer, K. | Author |
Year | 1989 (April) | Volume | 53 |
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Issue | 370 |
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Publisher | Mineralogical Society |
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Download URL | https://rruff.info/doclib/MinMag/Volume_53/53-370-231.pdf+ |
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DOI | doi:10.1180/minmag.1989.053.370.10Search in ResearchGate |
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| Generate Citation Formats |
Mindat Ref. ID | 1496 | Long-form Identifier | mindat:1:5:1496:4 |
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GUID | 0 |
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Full Reference | Geiger, C. A., Winkler, B., Langer, K. (1989) Infrared spectra of synthetic almandine–grossular and almandine–pyrope garnet solid solutions: evidence for equivalent site behaviour. Mineralogical Magazine, 53 (370) 231-237 doi:10.1180/minmag.1989.053.370.10 |
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Plain Text | Geiger, C. A., Winkler, B., Langer, K. (1989) Infrared spectra of synthetic almandine–grossular and almandine–pyrope garnet solid solutions: evidence for equivalent site behaviour. Mineralogical Magazine, 53 (370) 231-237 doi:10.1180/minmag.1989.053.370.10 |
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In | (1989, April) Mineralogical Magazine Vol. 53 (370) Mineralogical Society |
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Abstract/Notes | AbstractThe infrared (IR) spectra of almandine-grossular and almandine-pyrope garnet solid solutions have been measured using the powder method. Frequency shifts of a band related to internal vibrations associated with the 8-co-ordinate dodecahedral site are nonlinear in almandine-grossular garnets and mimic the form of its molar volume of mixing curve. Almandine-pyrope solid solutions have nearly ideal molar volumes of mixing and the frequency shift of this same 8-co-ordinate site-related band is linear. The IR data support the empirically based crystal chemical model of Equivalent Site (ES) behaviour (Newton and Wood, 1980). The IR spectra give no indication of long-range ordering between Ca and Fe2+ in garnet, but thermodynamic calculations involving Ca-poor garnets might be affected by small volume or short-range ordering anomalies. |
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