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Refinement of Mn-Substituted Muscovite and Phlogopite

Published online by Cambridge University Press:  02 April 2024

Rick A. Knurr  and
S. W. Bailey
Rick A. Knurr
Affiliation:
Department of Geology and Geophysics, University of Wisconsin-Madison, Madison, Wisconsin 53706
S. W. Bailey
Affiliation:
Department of Geology and Geophysics, University of Wisconsin-Madison, Madison, Wisconsin 53706
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Abstract

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The crystal structures of a reddish-purple, Mn-bearing muscovite-2M1 (alurgite variety) and a reddish-brown, Mn-bearing phlogopite-1M (manganophyllite variety) were refined to final residuals of 2.7% and 3.1%, respectively. The refinements were carried out in space groups C2/c and C1 for alurgite and C2/m and C2 for manganophyllite. The C1 and C2 subgroup refinements gave atomic coordinates consistent with the parent space group refinements. No cation ordering was found in either specimen, and the structures are very similar to those of muscovite and phlogopite. Residual areas of positive electron densities were found between the tetrahedral cations and neighboring oxygens in difference maps of both minerals. Those of alurgite were examined in detail to show the correlation between the residual densities and covalent bonding in the tetrahedra. The valence of the Fe present was determined by Mössbauer spectra as Fe3+ in both samples and of the Mn by optical spectra as Mn3+ in the alurgite but as Mn2+ in the manganophyllite.

Keywords

AlurgiteCrystal structureManganeseManganophylliteMuscovitePhlogopite
Type
Research Article
Information
Clays and Clay Minerals , Volume 34 , Issue 1 , February 1986 , pp. 7 - 16
Copyright
Copyright © 1986, The Clay Minerals Society

References

Annersten, H. and Hålenius, U., 1976 Ion distribution in pink muscovite: a discussion Amer. Mineral. 61 1045–1050.Google Scholar
Bilgrami, S. A., 1956 Manganese silicate minerals from Chikla, Bhandara district, India Mineral. Mag. 31 236–244.Google Scholar
Burns, R. G., 1970 Mineralogical Applications of Crystal Field Theory .Google Scholar
Cromer, D. T. and Mann, J. B., 1968 X-ray scattering factors computed from numerical Hartree-Fock wave functions Acta Crystallogr. A24 321–324.CrossRefGoogle Scholar
Dolíase, W. A., 1980 Optimum distance model of relaxation around substitutional defects Phys. Chem. Minerals 6 255–304.Google Scholar
Fujino, K., Sasaki, S., Takéuchi, Y. and Sadanaga, R., 1981 X-ray determination of electron distribution in forsterite, fayalite and tephroite Acta Crystallogr. B37 513–518.CrossRefGoogle Scholar
Gibbs, G. V., 1982 Molecules as models for bonding in silicates Amer. Mineral. 67 421–450.Google Scholar
Jr Giese, R. F., 1979 Hydroxyl orientations in 2:1 phyllosilicates Clays & Clay Minerals 27 213–223.CrossRefGoogle Scholar
Guggenheim, S. and Kato, T., 1984 Kinoshitalite and Mn phlogopites: trial refinements in subgroup symmetry and further refinement in ideal symmetry Mineral. J. 12 1–5.CrossRefGoogle Scholar
Guggenheim, S., Schulze, W. A., Harris, G. A. and Lin, J.-C., 1983 Non-centric layer silicates: an optical second harmonic generation, chemical, and X-ray study Clays & Clay Minerals 31 251–260.CrossRefGoogle Scholar
Hazen, R. M. and Burnham, C. W., 1973 The crystal structures of one-layer phlogopite and annite Amer. Mineral. 58 889–900.Google Scholar
Hazen, R. M. and Wones, D. R., 1972 The effect of cation substitutions on the physical properties of trioctahedral micas Amer. Mineral. 57 103–129.Google Scholar
Heinrich, E. W., 1946 Studies in the mica group; the biotite-phlogopite series Amer. J. Science 244 836–848.CrossRefGoogle Scholar
Heinrich, E. W. and Levinson, A. A., 1953 Mineralogy of the rose muscovites Amer. Mineral. 38 25–49.Google Scholar
Heinrich, E. W. and Levinson, A. A., 1955 Studies in the mica group; polymorphism among the high-silica sericites Amer. Mineral. 40 983–985.Google Scholar
Jakob, J., 1925 Beitrage zur chemischen Konstitution der Glimmer. I. Mitteilung: Die schwedischen Manganophylle Z. Kristallogr. 61 155–163.CrossRefGoogle Scholar
Joswig, W., 1972 Neutronenbeugungsmessungen an einem 1M-Phlogopit Neues Jahrb. Mineral. Monatshefte 1–11.Google Scholar
Penfield, S. L., 1893 On some minerals from the manganese mines of St. Marcel, in Piedmont, Italy Amer. J. Sci. 46 288–295.CrossRefGoogle Scholar
Richardson, S. M., 1975 A pink muscovite with reverse pleochroism from Archer’s Post, Kenya Amer. Mineral. 60 73–78.Google Scholar
Richardson, S. M. and Jr Richardson, J. W., 1982 Crystal structure of a pink muscovite from Archer’s Post, Kenya: implications for reverse pleochroism in dioctahedral micas Amer. Mineral. 67 69–75.Google Scholar
Rothbauer, R., 1971 Untersuchung eines 2M 1-Muskovits mit Neutronenstrahlen Neues Jahrb. Mineral. Monatshefte 143–154.Google Scholar
Sasaki, S., Fugino, K., Takéuchi, Y. and Sadanaga, R., 1980 On the estimation of atomic charges by the X-ray method for some oxides and silicates Acta Crystallogr. A36 904–915.CrossRefGoogle Scholar
Smith, G., Hålenius, U., Annersten, H. and Ackermann, L., 1983 Optical and Mössbauer spectra of manganese-bearing phlogopites: Fe3+ IV-Mn2+ VI pair absorption as the origin of reverse pleochroism Amer. Mineral. 68 759–768.Google Scholar