CaltechTHESIS
  A Caltech Library Service

Magnetic behavior of basic iron(III) compounds. I. Magnetic behavior of the basic iron sulphates and basic iron chromate. II. Magnetic behavior of delta ferric oxide hydroxide

Citation

Powers, Dana Auburn (1975) Magnetic behavior of basic iron(III) compounds. I. Magnetic behavior of the basic iron sulphates and basic iron chromate. II. Magnetic behavior of delta ferric oxide hydroxide. Dissertation (Ph.D.), California Institute of Technology. http://resolver.caltech.edu/CaltechTHESIS:02112015-085855387

Abstract

I. The thermomagnetic behavior and infrared spectroscopic features of KFe3(SO4)2(OH)6 (jarosite), (H3O)Fe3(SO4)2 (OH)6 (hydronium jarosite), KFe3(CrO4)2 (OH)6, Fe(OH)SO4 (basic iron sulfate), and Fe(OH)CrO4 (basic iron chromate) are reported. Fe(OH)CrO4 and KFe3(CrO4)2 (OH)6 are shown to be weak ferro magnets with Curie temperatures of 73 and 71 °K, respectively. This unusual magnetic behavior is rationalized in terms of the ionic spin configurations of the phases. Exchange coupling through chromate bridging groups is shown to be weak.

II. The magnetic behavior and the influence of preparative history on the magnetic behavior of δFeO(OH) is reported. δFeO(OH) is shown to be a fine-particulate, uniaxial, magnetic species. Magnetization data for this species are shown to be consistent with the existence of magnetically inactive layers surrounding magnetic particles.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:Chemistry
Degree Grantor:California Institute of Technology
Division:Chemistry and Chemical Engineering
Major Option:Chemistry
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Gray, Harry B.
Thesis Committee:
  • Unknown, Unknown
Defense Date:25 July 1974
Record Number:CaltechTHESIS:02112015-085855387
Persistent URL:http://resolver.caltech.edu/CaltechTHESIS:02112015-085855387
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:8768
Collection:CaltechTHESIS
Deposited By: Benjamin Perez
Deposited On:11 Feb 2015 18:51
Last Modified:11 Feb 2015 18:51

Thesis Files

[img]
Preview
PDF - Final Version
See Usage Policy.

63Mb

Repository Staff Only: item control page