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Science 30 March 1979:
Vol. 203. no. 4387, pp. 1340 - 1343
DOI: 10.1126/science.203.4387.1340
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Articles

Variable Porosity in Siliceous Skeletons: Determination and Importance

DAVID C. HURD 1, CHIYE WENKAM 2, H. STUART PANKRATZ 3, and JAMES FUGATE 4

1 Department of Oceanography and Hawaii Institute of Geophysics, University of Hawaii, Honolulu 96822
2 Scripps Institution of Oceanography, Geological Research Division, University of California at San Diego, La Jolla 92037
3 Department of Microbiology and Public Health, Michigan State University, East Lansing 48824
4 U.S. Geological Survey, Corpus Christi, Texas 78411

Gas adsorption data were used to obtain the specific surface area and specific pore volume for a variety of biogenically precipitated silica semples. The results suggest that this material is finely divided and porous. This interpretation was corroborated by the use of transmission electron microscopy at magnifications up to 180,000.

Submitted on September 18, 1978
Revised on December 14, 1978

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Science. ISSN 0036-8075 (print), 1095-9203 (online)