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Chemical composition and physical properties of lithium-iron micas from the Krušné hory (Erzgebirge), Czechoslovakia and Germany. Part B: Cell parameters and optical data

Published online by Cambridge University Press:  05 July 2018

M. Rieder ,
A. Píchová ,
M. Fassová ,
E. Fediuková  and
P. Černý
M. Rieder
Affiliation:
Department of Earth and Planetary Sciences, Johns Hopkins University, Baltimore, Maryland
A. Píchová
Affiliation:
Geological Survey of Czechoslovakia, Praha
M. Fassová
Affiliation:
Geological Survey of Czechoslovakia, Praha
E. Fediuková
Affiliation:
Geological Survey of Czechoslovakia, Praha
P. Černý
Affiliation:
Geological Institute, Czechoslovak Academy of Sciences, Praha
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Summary

Unit-cell dimensions and refractive indices of lithium-iron micas decrease with decreasing iron and increasing lithium. Indices β and γ as well as parameters a and b can be used to estimate the composition of lithium-iron micas but basal spacing and 2Vα are poor indicators of composition.

The chemical composition of natural lithium-iron micas from the Krušné hory and the Erzgebirge along the Czechoslovak—German border was discussed in Part A of this study (Rieder et al., 1970). It was concluded that the composition and crystallography of these micas fit best the series siderophyllite-polylithionite. The compositions were expressed by the ratio A′ = LR/(LR+‘Fe’). In this expression, LR is the subscript value of Li or octahedral R3+ (whichever is the smaller) in the crystallochemical formula, ‘Fe’ is the sum of the values in the formula of Fe2+ and Mn2+. A′ therefore defines the position of a particular mica on the siderophyllite-polylithionite join. This paper deals with the correlation between composition, cell dimensions, and refractive indices.

Type
Research Article
Information
Mineralogical Magazine , Volume 38 , Issue 294 , June 1971 , pp. 190 - 196
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2013

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Footnotes

1

Present address: Ústav geologických věd University Karlovy, Albertov 6, Praha 2, Czechoslovakia.

References

Buerger, (M.J.), 1964. The Precession Method in X-ray Crystallography. New York, London, Sydney (Wiley) [M.A. 17-I31].Google Scholar
Gottesmann, (B.), 1962. Geologie, 11, 1164-76.Google Scholar
Guest, (P.G.), 1961. Numerical Methods of Curve Fitting. Cambridge (University Press).Google Scholar
Huebner, (J.S.), 1967. Ph.D. Thesis, Johns Hopkins University, Baltimore, Maryland, U.S.A.Google Scholar
Kunitz, (W.), 1924. Neues Jahrb. Min., Beil.-Bd_ 50, 365.413 [M.A. 2-424].Google Scholar
Melka, (K.), 1961. Rozpravy Cesk. Akad. Vgd, Rada Mat. Přirod. VSd, 71, seš 4, 2.59.Google Scholar
Munoz, (J.L.), 1966. Ph.D. Thesis, Johns Hopkins University, Baltimore, Maryland, U.S.A.Google Scholar
[Povilaitis, (M. M.) and Organova, (N. I.)] (Trans. Min. Mus. Acad. Sci. U.S.S.R.) 14, 140-65.Google Scholar
Rieder, (M.), 1968. Science, 160, 1338-40.CrossRefGoogle Scholar
Rieder, (M.), Huka, (M.), Kučerová (D.), Minařík, (L.), Obermajer, (J.), and Povondra, (P.), 1970. Contr. Min. Petr. 27, 131.58.CrossRefGoogle Scholar
Ross, (M.), Takeda, (H.), and Wones, (D.R.), 1966. Science, 151, 191.3 .CrossRefGoogle Scholar
Swanson, (H.E.) and Fuyat, (R.K.), 1953. Nat. Bur. Std. U.S., Circ. 539, 2, 42.3 [M.A. 12-430].Google Scholar
Wones, (D.R.), 1963. Amer. Min. 48, 1300.21 [M.A. 16-560].Google Scholar