| Reference Type | Journal (article/letter/editorial) |
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| Title | Excess free energies of mixing of Sr,Ba-bearing binary feldspar solid solutions (experimental data) |
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| Journal | Mineralogical Magazine | ISSN | 0026-461X |
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| Authors | Kotelnikov, A. R. | Author |
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| Chernysheva, I. V. | Author |
| Year | 1995 (March) | Volume | 59 |
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| Issue | 394 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_59/59-394-79.pdf+ |
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| DOI | doi:10.1180/minmag.1995.59.394.07Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 2613 | Long-form Identifier | mindat:1:5:2613:4 |
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| GUID | 0 |
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| Full Reference | Kotelnikov, A. R., Chernysheva, I. V. (1995) Excess free energies of mixing of Sr,Ba-bearing binary feldspar solid solutions (experimental data) Mineralogical Magazine, 59 (394) 79-91 doi:10.1180/minmag.1995.59.394.07 |
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| Plain Text | Kotelnikov, A. R., Chernysheva, I. V. (1995) Excess free energies of mixing of Sr,Ba-bearing binary feldspar solid solutions (experimental data) Mineralogical Magazine, 59 (394) 79-91 doi:10.1180/minmag.1995.59.394.07 |
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| In | (1995, March) Mineralogical Magazine Vol. 59 (394) Mineralogical Society |
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| Abstract/Notes | AbstractThe distribution of potassium and strontium, potassium and barium between feldspars and aqueous chloride solutions was studied at 700°C, 2 kbar and 800°C, 2 kbar respectively. The distribution of Sr and Ba between coexisting feldspar and chloride solutions is not ideal; Sr and Ba are enriched in feldspar relative to solution. In order to estimate the phase state of the chloride solutions, special experiments were conducted using the synthetic fluid-inclusion method in the systems KCl-BaCl2-H2O and KCl-SrCl2-H2O at 700–800°C, 2 kbar. It was shown that (0.5M KCl+0.5M SrCl2) aqueous solution is homogeneous at 800°C, 2 kbar. The 0.25–0.5M SrCl2 solutions are homogeneous at 700°C 2, kbar. The (0.5M KCl+0.5M BaCl2) solution is homogeneous at 700°C, 2 kbar and heterogeneous at 800°C, 2 kbar. Margules parameters for describing the excess energy of mixing of the (K,Sr)- and (K,Ba)-feldspar solid solutions were calculated. The integrated values of excess energy of mixing () were estimated for the different binary feldspar solid solutions, and a correlation of with the crystallochemical parameter ρ = (RA-RB)/D(Me-O) was observed. Feldspar solid solutions can be subdivided into three groups based on the relationship between , p and the stability of the solid solution. |
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