A study of crystallization from water of compounds in the system Fe²⁺ - Cu²⁺ - So₄²⁻.

Persistent Link:
http://hdl.handle.net/10150/191508
Title:
A study of crystallization from water of compounds in the system Fe²⁺ - Cu²⁺ - So₄²⁻.
Author:
Walton, Wayne J. A.
Issue Date:
1968
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
The possible solid solution series between melanterite (FeSO(4)∙7H(2)0) and boothite (CuSo(4)∙7H(2)0) was investigated to ascertain the extent to which the series exists. Sy-ritheses of these compounds and an intermediate minera1 pisanite [(Fe,Cu) SO(4)∙7H(2)0], were attempted by introducing copper sulfate into an aqueous solution of ferrous sulfate. Temperature, concentration, and time of crystallization were varied in an effort to crystallize the desired products. Under various conditions, it was possible to crystallize all three of the compounds, but no intermediate mixtures or compounds other than pisanite could be isolated. Thus, a solid solution series between melanterjte and boothite does not exist, but rather is prepresented. by crystals of the end members arid one intermediate compound pisanite for which the new formula of (Fe(0.80)Cu(0.20)) SO(4)∙7H(2)0 which represents 2O.O3% Cu++ is proposed. Compounds formed were checked for composition by X-ray diffraction and polarography. Whereas crystal growth was attempted for many varied intermediate compositions, all samples representing intermediate compositions proved to be pisanite-type material. This leads to the conclusion that the melanterite structure cannot support substitution of copper for iron except in the amount stated above. Cell dimensions of the artificial boothite formed were determined by single crystal X-ray methods and were found to agree closely with those of the isostructural artificially formed nielanterite. Boothite dehydrates easily and is converted to chalcanthite (CuSo(4)∙7H(2)0) at room temperature and low humidity. For this reason, boothite as a pure compound cannot exist in nature except under very special conditions.
Type:
Thesis-Reproduction (electronic); text
LCSH Subjects:
Hydrology.; Intermetallic compounds.; Metal crystals.; Copper sulfate.; Iron compounds.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Geology; Graduate College
Degree Grantor:
University of Arizona
Committee Chair:
Anthony, John W.

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleA study of crystallization from water of compounds in the system Fe²⁺ - Cu²⁺ - So₄²⁻.en_US
dc.creatorWalton, Wayne J. A.en_US
dc.contributor.authorWalton, Wayne J. A.en_US
dc.date.issued1968en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractThe possible solid solution series between melanterite (FeSO(4)∙7H(2)0) and boothite (CuSo(4)∙7H(2)0) was investigated to ascertain the extent to which the series exists. Sy-ritheses of these compounds and an intermediate minera1 pisanite [(Fe,Cu) SO(4)∙7H(2)0], were attempted by introducing copper sulfate into an aqueous solution of ferrous sulfate. Temperature, concentration, and time of crystallization were varied in an effort to crystallize the desired products. Under various conditions, it was possible to crystallize all three of the compounds, but no intermediate mixtures or compounds other than pisanite could be isolated. Thus, a solid solution series between melanterjte and boothite does not exist, but rather is prepresented. by crystals of the end members arid one intermediate compound pisanite for which the new formula of (Fe(0.80)Cu(0.20)) SO(4)∙7H(2)0 which represents 2O.O3% Cu++ is proposed. Compounds formed were checked for composition by X-ray diffraction and polarography. Whereas crystal growth was attempted for many varied intermediate compositions, all samples representing intermediate compositions proved to be pisanite-type material. This leads to the conclusion that the melanterite structure cannot support substitution of copper for iron except in the amount stated above. Cell dimensions of the artificial boothite formed were determined by single crystal X-ray methods and were found to agree closely with those of the isostructural artificially formed nielanterite. Boothite dehydrates easily and is converted to chalcanthite (CuSo(4)∙7H(2)0) at room temperature and low humidity. For this reason, boothite as a pure compound cannot exist in nature except under very special conditions.en_US
dc.description.notehydrology collectionen_US
dc.typeThesis-Reproduction (electronic)en_US
dc.typetexten_US
dc.subject.lcshHydrology.en_US
dc.subject.lcshIntermetallic compounds.en_US
dc.subject.lcshMetal crystals.en_US
dc.subject.lcshCopper sulfate.en_US
dc.subject.lcshIron compounds.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineGeologyen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.chairAnthony, John W.en_US
dc.contributor.committeememberGuilbert, John M.en_US
dc.identifier.oclc225192057en_US
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