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An interpretation of the hydroxyl contents of biotites and muscovites

Published online by Cambridge University Press:  05 July 2018

Warren C. Forbes
Warren C. Forbes*
Affiliation:
Department of Geological Sciences, University of Illinois at Chicago Circle, Chicago, Illinois 60680
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Summary

The net cationic charge of the octahedral and tetrahedral layers was calculated from the analyses of 100 biotites and 93 muscovites and compared to the observed hydroxyl contents (OH+F+Cl). The correlation coefficient between these parameters of −0·96 for biotites and −0·82 for muscovites demonstrates that the hydroxyl content in these micas varies in response to cationic substitutions. Thus substitutions in micas involve cation-hydroxyl replacement couples in addition to other modes previously recognized. Tetrasilicic phlogopite, K2Mg6Si8O22(OH)2, which is related to phlogopite by the substitution Al3+ + H+ = Si4+ was synthesized but is not a stable phase under the conditions investigated. This mica crystallizes as a 1M polymorph with a = 5·289(2) Å, b = 9·151(3) Å, c = 10·247(3) Å, β = 100°4(2).

Exchange reactions, such as Al3+ + H+ ⇌ Si4+, between phlogopite and pyroxenes at depth may provide a mechanism for release of H+ within the mantle.

Type
Research Article
Information
Mineralogical Magazine , Volume 38 , Issue 298 , June 1972 , pp. 712 - 720
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1972

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References

Baur, (W.H.), 1970. Trans. Amer. Cryst. Assoc. 6, 125.Google Scholar
Bloss, (F.D.), SHEKARCm (E.), and SrrEll, (H.R.), 1959. Amer. Min. 44, 33 [M.A. 14-345].Google Scholar
Butler, (B.C.M.), 1967. Journ. Petrology, 8, 233.[M.A. 18-276].10.1093/petrology/8.2.233CrossRefGoogle Scholar
Deer, (W.A.), Howie, (R.A.), and Zussman, (J.), 1962. Rock Forming Silicates, 3. Sheet Silicates. London (Longmans).Google Scholar
Dodge, (F.C.W.), Smith, (V.C.), and MAYs (R. E.), 1969. Journ. Petrology, 10, 250.[M.A. 21-58].CrossRefGoogle Scholar
Euoster, (H.P.), and Wones, (D.R.), 1962. Ibid., 3, 82.[M.A. 16-52].Google Scholar
Evans, (H.T.), Avvleman, (D.E.), and Handwerker, (D.W.), 1963. Progr. Amer. Crystallogr. Assoc. Ann. Meet. 42.Google Scholar
Forbes, (W.C.), 1969. Amer. Min. 54, 1399 [M.A. 21-126].Google Scholar
Foster, (M.D.), 1960. U.S. Geol. Surv. Prof. Pap. 354-B.Google Scholar
Foster, (M.D.), 1964. Ibid. 474-F.Google Scholar
Gower, (J.A.), 1957. Amer. Journ. Sci. 255, 142.CrossRefGoogle Scholar
Gruner, (J.W.), 1932. Zeits. Krist. 83, 75.Google Scholar
Khan, (A.A.), Baur, (W.H.), and Forbes, (W.C.), 1972. Acta Cryst. B28, 267.CrossRefGoogle Scholar
Kushiro, (I.), Syono, (Y.), and Akimoto, (S.), 1968. Earth Planet. Sci. Lett. 3, 197.10.1016/0012-821X(67)90036-2CrossRefGoogle Scholar
Larsen, (E. S. Jr.), Gonyer, (F.A.), and Irving, (J.), 1937. Amer. Min. 22, 898 [M.A. 7-31].Google Scholar
Mcgetchin, (T.R.), Silver, (L.T.), and Chodos, (A.A.), 1970. Journ. Geophys. Res. 75, 255 [M.A. 70-3336].CrossRefGoogle Scholar
Modreski, (P.J.) and Boettcher, (A.L.), 1970. Progr. Ann. Meet. Geol. Soc. Amer., Milwaukee, 626.Google Scholar
Muller, (G.), 1966. Contr. Min. Petr. 12, 59 [M.A. 18-193].CrossRefGoogle Scholar
Nash, (W.P.) and Wilkinson, (J.F.G.), 1970. Ibid. 25, 241 [M.A. 21-348].Google Scholar
Nockolds, (S.R.), 1947. Amer. Journ. Sci. 245, 401.10.2475/ajs.245.7.401CrossRefGoogle Scholar
Oxburgh, (E.R.), 1964. Geol. Mag. 101, 1 [M.A. 17-524].10.1017/S001675680004841XCrossRefGoogle Scholar
Rimsaite, (J.), 1964 . Beitr. Min. Petr. 10, 152 [M.A. 17-191].10.1007/BF02652613CrossRefGoogle Scholar
Rimsaite, (J.), 1970. Contr. Min. Petr. 25, 225 [M.A. 70-2533].10.1007/BF00371132CrossRefGoogle Scholar
Rinne, (F.), 1924. Verh. Akad. Wiss. Leipzig, 76, 261.Google Scholar
Roedder, (E.W.), 1951. Amer. Journ. Sci. 249, 81, 224.10.2475/ajs.249.3.224CrossRefGoogle Scholar
Sabatier, (H.) and Velde, (B.), 1970. Progr. Ann. Meet. Geol. Soc. Amer., Milwaukee, 671.Google Scholar
Seifert, (F.) and Schreyer, (W.), 1965. Amer. Min. 50, 1114 [M.A. 17-474].Google Scholar
Seifert, (F.) and Schreyer, (W.), 1969. Contr. Min. Petr. 22, 190.10.1007/BF00387953CrossRefGoogle Scholar
Seifert, (F.) and Schreyer, (W.), 1971. Ibid. 30, 196.Google Scholar
Wones, (D.R.), 1963. Amer. Min. 48, 1300 [M.A. 16-560].Google Scholar
Yoder, (H.S.) and Eugster, (H.P.), 1954. Geochimica Acta, 6, 157.CrossRefGoogle Scholar