title: Variable porosity in siliceous skeletons: determination and importance.
abstract: 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.
authors.forename: D C
authors.initials: DC
authors.lastname: Hurd
authors.forename: C
authors.initials: C
authors.lastname: Wenkam
authors.forename: H S
authors.initials: HS
authors.lastname: Pankratz
authors.forename: J
authors.initials: J
authors.lastname: Fugate