Melt densities in the Na sub 2 O-FeO-Fe sub 2 O sub 3 -SiO sub 2 system and the partial molar volume of tetrahedrally-coordinated ferric iron in silicate melts

Journal Article · Sat Oct 01 00:00:00 EDT 1988 · Geochimica et Cosmochimica Acta; (USA)

DOI:https://doi.org/10.1016/0016-7037(88)90305-5· OSTI ID:5254633

Dingwell, D B ^[1]; Brearley, M ^[2]; Dickinson, Jr, J E ^[3]

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1. Universitaet Bayreuth (West Germany)
2. Univ. of California, Los Angeles (USA)
3. Corning Glass Works, NY (USA)

The densities of 12 melts in the Na{sub 2}O-FeO-Fe{sub 2}O{sub 3}-SiO{sub 2} system have been determined in equilibrium with air, in the temperature range of 1,000-1,500{degree}C, using the double bob, Archimedean technique. Ferrous iron determinations of 100-200 mg samples, dip quenched from high temperature, indicate that all the melts investigated were highly oxidized under these experimental conditions. {sup 57}Fe Moessbauer spectra of glasses obtained by drop quenching 80 mg melt samples from loop equilibration runs yield Fe{sup 3+}/Fe{sup 2+} data equivalent to that for the densitometry (dip) samples for all but the most viscous melt, and confirm that all but one melt equilibrated with air during the densitometry measurements.

• OSTI ID: 5254633
• Journal Information: Geochimica et Cosmochimica Acta; (USA), Vol. 52:10; ISSN 0016-7037
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
IGNEOUS ROCKS
DENSITY
PETROGENESIS
REDOX REACTIONS
STRUCTURAL CHEMICAL ANALYSIS
CRYSTAL STRUCTURE
EQUILIBRIUM
GEOCHEMISTRY
IRON COMPOUNDS
MAGMA
MAGMATISM
OXIDATION
QUENCHING
SILICA
SILICATE MINERALS
SODIUM OXIDES
TEMPERATURE EFFECTS
ALKALI METAL COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
ROCKS
SILICON COMPOUNDS
SILICON OXIDES
SODIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
580000* - Geosciences