Abstract
Mössbauer studies of micas on the polylithionite-side-rophyllite join show the existence of a relation between the quadrupole splitting (ΔE Q) values of Fe2+ high spin doublets and both cationic and anionic composition of micas. This linear relation is positive as Li2O content increases and negative as F content increases. In the lithium iron micas, the inner ferrous quadrupole doublet is assigned to the cis-site M(2), while the outer doublet is assigned to the trans-site M(1). A random distribution of Fe2+ is observed in fluorine-rich compositions, while slight enrichment of the M(1) site is noticed in hydroxyl compositions, perhaps due to a more sensitive oxidation in situ in M(2) than M(1) sites. The Mössbauer spectrum of siderophyllite K2(Fe 2+4 Al2)(Si4Al4)O20(OH)4 shows the presence of only one ferrous doublet, which is assigned to M(2) sites. Hence from Mössbauer data we must consider a clintonite (“xanthophyllite”) structure for this mica. The ordered octahedral layer has two distorted ferrous cis-sites and one, more symmetrical, aluminum trans-site.
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References
Annersten H (1974) Mössbauer studies of natural biotite. Am Mineral 59:143–151
Foster MD (1960) Interpretation of the composition of lithium micas. US Geol Surv Prof Pap 354-B
Guggenheim S, Bailey SW (1977) The refinement of zinnwaldite 1 M in subgroup symmetry. Am Mineral 62:1158–1167
Herzenberg CL, Riley DL, Lamoreaux DL (1968) Mössbauer absorption in zinnwaldite mica. Nature 219:364–365
Hogg CS, Meads RR (1970) The Mössbauer spectra of several micas and related minerals. Mineral Mag 37:606–614
Ingalls R (1964) Electric field gradient tensor in ferrous compounds. Phys Rev 133:A784-A795
Levillain C, Maurel P, Menil F (1977) Localisation du fer, par voie chimique et par spectrométrie Mössbauer, dans la lépidolite du granite de Beauvoir (Massif Central français). Bull Soc Fr Minéral Cristallogr 100:137–142
Levillain C, Maurel P (1980) Etude par spectrométrie infrarouge de l'influence de la liaison hydrogène sur les fréquences d'élongation des liaisons Si-O dans les micas potassiques. C R Acad Sci Paris Sér D 290:1385–1388
Minneva RM (1978) Relationship between Mössbauer spectra and defect structure in biotites from electric field gradient calculations. Phys Chem Minerals 2:267–277
Rieder M (1968) Zinnwaldite: octahedral ordering in lithium micas. Science 160:1338–1340
Rieder M, Huka M, Kucerova D, Minarik L, Obermajer J, Povondra P (1970) Chemical composition and physical properties of lithium iron micas from the Krusné Hory Mts. (Erzgebirge). Part A. Chemical composition. Contrib Mineral Petrol 27:131–158
Rieder M (1971) Stability and physical properties of synthetic lithium iron micas. Am Mineral 56:256–280
Rutherford MJ (1973) The phase relations of aluminous iron biotites in the system KAlSi3O8-KalSiO4-Al2O3-Fe-O-H. J Petrol 14:160–180
Sartori F (1976) The crystal structure of 1 M lepidolite. Tschermaks Mineral Petrol Mitt 23:65–75
Takeda H, Burnham CW (1969) Fluor-polylithionite: a lithium mica with nearly hexagonal (Si2O5)2− ring. Mineral J 6:102–109
Takéuchi Y, Sadanaga R (1966) Structural studies of brittle micas. (1) The structure of xanthophyllite refined. Mineral J 4:424–437
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Levillain, C., Maurel, P. & Menil, F. Mössbauer studies of synthetic and natural micas on the polylithionite-siderophyllite join. Phys Chem Minerals 7, 71–76 (1981). https://doi.org/10.1007/BF00309454
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DOI: https://doi.org/10.1007/BF00309454