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Lithium–aluminium micas from the Meldon aplite, Devonshire, England

Published online by Cambridge University Press:  05 July 2018

M. Nawaz Chaudhry  and
R. A. Howie
M. Nawaz Chaudhry
Affiliation:
Department of Geology, King's College, University of London
R. A. Howie
Affiliation:
Department of Geology, King's College, University of London
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Summary

Chemical analyses of sixteen lithium-aluminium micas are presented along with their optical, physical, and X-ray data. Compositional variation, substitution relations in structural positions, and octahedral occupancy are discussed. The 2M2 structural types are found to crystallize in volatilerich low-temperature environments whereas the 1M polytypes occur in comparatively volatile-poor and higher-temperature environments. Variation diagrams have been constructed to show the relationship between octahedral sites occupied by and refractive indices and specific gravities.

Type
Research Article
Information
Mineralogical Magazine , Volume 39 , Issue 303 , September 1973 , pp. 289 - 296
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1973

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Footnotes

1

Present address: Department of Geology, University of the Panjab, Lahore, Pakistan.

References

Berggren, (T.), 1940. Minerals of the Varutrask pegmatite. XV. Analyses of mica minerals and their interpretation. Geol. Foren. Stockholm Forh., 62, 182–93 [M.A. 8-22].CrossRefGoogle Scholar
Berggren, (T.) 1941. Minerals of the Varutrask pegmatite. XXV. Some new analyses of lithium bearing micaCrossRefGoogle Scholar
minerals. Ibid. 63, 262-78 [M.A. 8-352].Google Scholar
Foster, (M. D.), 1960. Interpretation of the composition of lithium micas. U.S. Geol. Survey, prof, paper, 354-E [M.A. 15-263].Google Scholar
Grimaldi, (F. S.), Ingram, (B.), and Cuttitta, (F.), 1955. Determination of small and large amounts of fluorine in rocks. Analyt. Chem., 27, 918 [M.A. 13-324].CrossRefGoogle Scholar
Groves, (A. W.), 1951. Silicate analysis London (Allen and Unwin, Ltd.), p. 167.Google Scholar
Hallimond, (A. F.), 1925. On the chemical classification of the mica group: 1. The acid micas. Min. Mag., 20, 305–18.Google Scholar
Heinrich, (E. W.), 1967. Micas of the Brown Derby pegmatites, Gunnison County, Colorado. Amer. Min., 52, 1110–21 [M.A. 19–136].Google Scholar
Hendricks, (S. B.) and Jefferson, (M.), 1939. Polymorphism of the micas, with optical measurement. Ibid. 24, 729-71 [M.A. 7-496].Google Scholar
Hey, (M. H.), 1955. An index of mineral species and varieties:, 2 nd edition. London, British Museum (Nat. History).Google Scholar
Levinson, (A. A.), 1953. Studies in the mica group. Relationship between polymorphism and composition in the muscovite-lepidolite series. Amer. Min., 38, 88–107 [M.A. 12-98].Google Scholar
Marshall, (C. E.), 1949. The colloid chemistry of the silicate minerals. New York (Academic Press), 56.Google Scholar
Radoslovich, (E. W.), 1963. The cell dimension and symmetry of layer-lattice silicates. V. Composition limits. Amer. Min., 48, 348–67 [M.A. I6-341].Google Scholar
Rieder, (M.), Huka, (M.), Kučerova, (D.), Minařík, (L.), Obermajer, (J.), and Povondra, (P.), 1970. Chemical composition and physical properties of lithium-iron micas from the Krušné hory Mts. (Erzgebirge). Part A: Chemical composition. Contr. Min. Petr., 27, 131–58 [M.A. 71-498].CrossRefGoogle Scholar
Rieder, (M.), Huka, (M.), Kučerova, (D.), Minařík, (L.), Obermajer, (J.), and Povondra, (P.) , Píchová, (A.), Fassová, (M.), Fediuková, (E.), and Černý, (P.), 1971. Chemical composition and physical properties of lithium-iron micas from the Krušné hory (Erzgebirge), Czechoslovakia and Germany. Part B: Cell parameters and optical data. Min. Mag., 38, 190–6 [M.A. 71-2252].CrossRefGoogle Scholar
Rinaldi, (R.), Černý, (P.), and Ferguson, (R. B.), 1972. The Tanco pegmatite at Bernic Lake, Manitoba. VI. Lithium-rubidium-cesium micas. Canad. Min., 11, 690–707 [M.A. 73-2838].Google Scholar
Smith, (J. V.) and Yoder, (H. S. Jr.), 1956. Experimental and theoretical studies of the mica polymorphs. Min. Mag., 31, 209–35.Google Scholar
Stevens, (R. E.), 1938. New analyses of lepidolites and their interpretation. Amer. Min., 23, 607–28 [M.A. 7-353].Google Scholar
Winchell, (A. N.), 1925. Studies in the mica group. Pt. 2. Amer. Journ. Sci., 209, 309–27, 415-30 [M.A. 3-12].Google Scholar
Winchell, (A. N.) 1927. Further studies in the mica group. Amer. Min., 12, 267–79 [M.A. 3-12],Google Scholar
Winchell, (A. N.) 1942. Further studies of the lepidolite system. Ibid. 27, 114-30.Google Scholar
Winchell, (A. N.) and Winchell, (H.), 1962. Elements of optical mineralogy. New York (Wiley), 2, 370-3.Google Scholar
Worth, (R. H.), 1920. The geology of the Meldon valleys near Okehampton, on the northern verge of Dartmoor. Quart. Journ. Geol. Soc., 75, 77–114.Google Scholar