Schwertmannite: A unique mineral, contains a replaceable ligand, transforms to jarosites, hematites, and/or basic iron sulfate
- 1 October 1997
- journal article
- Published by Springer Science and Business Media LLC in Journal of Materials Research
- Vol. 12 (10), 2751-2758
- https://doi.org/10.1557/jmr.1997.0366
Abstract
An infrared study is made of the chemical changes of synthetic schwertmannite, which normally is a coal oxidation by-product formed by thiobacillus ferrooxidan bacteria. Schwertmannite, a class of minerals, is a metastable compound that transforms to jarosite, hematite, and/or basic iron sulfate at relatively low temperatures, and is analogous in structure to basic iron sulfate, but with a –Fe–O– cage. A proposed formula for schwertmannite is Fe4O4(OH)2·AN(2/e)*nH2O, where AN is the anion andeis its charge, where sulfate can be replaced with other anions, a possible catalyst. The facile conversion of schwertmannite to a black or yellow material might make a useful raw material for the pigment industry.Keywords
This publication has 31 references indexed in Scilit:
- Preparing particulate magnetites with pigment properties from suspensions of basic iron(III) sulphates with the structure of jarositeJournal of Materials Science, 1993
- PRECIPITATION OF IRON, SODIUM, AND POTASSIUM IMPURITIES FROM SYNTHETIC SOLUTIONS MODELING SPENT ACID STREAMS FROM A CHEMICAL COAL CLEANING PROCESSFuel Science and Technology International, 1990
- Synthesis, characterization and thermal behaviour of Fe4(OH)11NO3·2H2OJournal of Thermal Analysis and Calorimetry, 1988
- Normal coordinate analysis of α-FeOOH - a molecular approachJournal of Molecular Structure, 1982
- The crystal structures of jarosite and svanbergiteMineralogical Journal, 1977
- Magnetic behavior and infrared spectra of jarosite, basic iron sulfate, and their chromate analogsJournal of Solid State Chemistry, 1975
- Electronic structure of oxo-bridge iron(III) dimersJournal of the American Chemical Society, 1972
- The Hydrolytic Polymerization of Iron(III)Journal of the American Chemical Society, 1966
- Ion-Exchange and Spectrophotometric Investigation of Iron(III) Sulfate Complex IonsJournal of the American Chemical Society, 1953
- Association of Ferric Ions with Chloride, Bromide and Hydroxyl Ions (A Spectroscopic Study)Journal of the American Chemical Society, 1942