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Clay Minerals; June 2002; v. 37; no. 2; p. 249-253; DOI: 10.1180/0009855023720031
© 2002 Mineralogical Society of Great Britain and Ireland
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Spongolite: a hollow fibrous mineral from Mato Grosso do Sul State, Brazil

F. J. DOS SANTOS1, O. SALGADO SIQUEIRA1, A. A. S. T. DELBEN2, J. R. JURKEVICZ DELBEN2 and P. MELNIKOV2,*

1 Department of Chemistry, Federal University of Mato Grosso do Sul (UFMS), Cidade Universitária s/n CEP 79070-900, Campo Grande (MS), Brazil, and 2 Department of Physics, Federal University of Mato Grosso do Sul (UFMS), Cidade Universitária s/n CEP 79070-900, Campo Grande (MS), Brazil

* E-mail: petrmelnikov{at}yahoo.com

(Received 3 January 2001; revised 18 September 2001)

Spongolite from the State of Mato Grosso do Sul, Brazil, contains the remains of fossil sponges and hollow needles or microcapillaries with uniform surfaces. The central tunnels are ~1/10 to 1/2 of the cylinder’s diameter. The material is essentially X-ray amorphous though it contains small amounts of orthosilicic acids. The other main elements were Ti and Fe. Spongolite may have uses as a sorbent, as a bioavailable silicon source or, after blending with glass waste, it can be used in the fabrication of lightweight products having a closed-cell structure, potentially useful as an industrial insulator.

KEYWORDS: spongolite, hollow fibrous mineral, Mato Grosso do Sul, Brazil






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