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Topotactic route to synthesis of novel hydroxylated phases: I. Trioctahedral Micas

Published online by Cambridge University Press:  09 July 2018

S. Komarneni  and
R. Roy
S. Komarneni
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802, U.S.A
R. Roy
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802, U.S.A
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Abstract

K-depleted phlogopite mica was used as a topotactic precursor and treated with alkali (Li+, K+, , Rb+, Cs+), alkaline-earth (Mg2+, Ca2+, Sr2+, Ba2+) and trivalent (Al3+) cations under hydrothermal conditions of 200°C and 30 MPa pressure. K-, NH4-, Rb- and Cs-aluminosilicate micas were synthesised at 200°C in one day. The synthesis of Cs-aluminosilicate mica, with potential applications in the management of nuclear wastes, has been achieved for the first time by this approach. Ion exchange by Li+, Na+ and alkaline-earth cations under hydrothermal conditions did not produce anhydrous mica phases but resulted in hydrous phases with one or two layers of water molecules between the clay layers. The formation of hydrous phases may be attributed to the high hydration energy of the above cations compared to K+, , RB+ and Cs+. Ion exchange with Al3+ produced a chlorite-like phase because of the hydrolysis of Al3+ under these hydrothermal conditions. These studies are of relevance in the immobilization of wastes where hazardous ions can be fixed in highly stable insoluble phases like mica or chlorite.

Type
Research Article
Information
Clay Minerals , Volume 21 , Issue 2 , June 1986 , pp. 125 - 131
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1986

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References

Balgord, W.D. & Roy, R. (1971) Crystal chemical relationships in the analcite family I. Synthesis and cation exchange behavior. Pp. 140–148 in: Advances in Chemistry Series 101. American Chemical Society, Washington, D.C. Google Scholar
Brindley, G.W. (1963) Role of crystal structure in solid state reactions of clays and related minerals. Proc. Int. Clay Conf. Sweden, 37–44.Google Scholar
Eugster, H.P. & Munoz, J. (1965) Ammonium micas: Possible sources of atmospheric ammonia and nitrogen. Science 151, 683–686.CrossRefGoogle Scholar
Eysel, W. & Roy, D.M. (1975) Topotactic reaction of aragonite to hydroxyapafite. Zeits. Krist. 141, 11–24.Google Scholar
Goldschmidt, V.M. (1954) Geochemistry. Clarendon Press, Oxford.Google Scholar
Hoss, H. & Roy, R. (1960) Zeolite studies III: On natural phillipsite, gismondite, harmotome, chabazite, and gmelinite. Heidelberger Beitrage zur Mineral und Petrog. 7, 389–408.Google Scholar
Hunt, J.P. (1965) Metal Ions in Aqueous Solutions. W. H. Benjamin, New York.Google Scholar
Jackson, M.L. (1974) Soil Chemical Analysis—Advanced Course, p 895. Publ. by the author, Department of Soils, The University of Wisconsin, Madison, WI.Google Scholar
Kimata, M. (1979) Properties of synthetic Cs-dioctahedral hydrous mica, CsGa2(Ga,Ge3)10(OH)2 . Am. Miner. 64, 1184–1187.Google Scholar
Kittrick, J.A. (1966) Forces involved in ion fixation by vermiculite. Soil Sci. Soc. Am. Proc. 30, 801–803.Google Scholar
Komarneni, S. (1985) Phillipsite in Cs decontamination and immobilization. Clays Clay Miner. 33, 145–151.Google Scholar
Komarneni, S., Freeborn, W.P. & Smith, C.A. (1979) Simple cold-weld sealing of noble metal tubes. Am. Miner. 64, 650–651.Google Scholar
Komarneni, S. & Roy, R. (1981a) Zeolites for fixation of cesium and strontium from radwastes by thermal and hydrothermal treatments. Nucl. Chem. Waste Manag. 2, 259–264.CrossRefGoogle Scholar
Komarneni, S. & Roy, R. (1981b) Interactions of backfill materials with cesium in a bittern brine under repository conditions. Nucl. Tech. 56, 575–579.Google Scholar
Scott, A.D. & Smith, S.J. (1966) Susceptibility of interlayer potassium in micas to exchange with sodium. Clays Clay Miner. 14, 69–81.CrossRefGoogle Scholar
Shainberg, I. & Kemper, W.D. (1966) Hydration status of adsorbed cations. Soil Sci. Soc. Am. Proc. 30, 707–713.Google Scholar
Sridhar, K., Jackson, M.L & Syers, J.K. (1972) Cation and layer charge effects on blister-like osmotic swelling of micaceous vermiculite. Am. Miner. 57, 1832–1848.Google Scholar
Taylor, H.F.W. (1960) Aspects of the crystal structures of calcium silicates and aluminates. J. Appl. Chem. 10, 317–323.CrossRefGoogle Scholar
Yajima, S. (1983) Special heat resisting materials from organometallic polymers. Am. Ceram. Soc. Bull. 62, 893–903.Google Scholar