skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Solubility Behavior and Phase Stability of Transition Metal Oxides in Alkaline Hydrothermal Environments

Abstract

The solubility behavior of transition metal oxides in high temperature water is interpreted by recognizing three types of chemical reaction equilibria: metal oxide hydration/dehydration, metal oxide dissolution and metal ion hydroxocomplex formation. The equilibria are quantified using thermodynamic concepts and the thermochemical properties of the metal oxides/ions representative of the most common constituents of construction metal alloys, i.e., element shaving atomic numbers between Z = 22 (Ti) and Z = 30 (Zn), are summarized on the basis of metal oxide solubility studies conducted in the laboratory. Particular attention is devoted to the uncharged metal ion hydrocomplex, M{sup Z}(OH){sub Z}(aq), since its thermochemical properties define minimum solubilities of the metal oxide at a given temperature. Experimentally-extracted values of standard partial molal entropy (S{sup 0}) for the transition metal ion neutral hydroxocomplex are shown to be influenced by ligand field stabilization energies and complex symmetry.

Authors:
Publication Date:
Research Org.:
Lockheed Martin Corporation, Schenectady, NY 12301 (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
821298
Report Number(s):
LM-00K035
TRN: US200409%%121
DOE Contract Number:  
AC 12-00-SN39357
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 18 May 2000
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; ALLOYS; ATOMIC NUMBER; CHEMICAL REACTIONS; CONSTRUCTION; DISSOLUTION; ENTROPY; OXIDES; PHASE STABILITY; SOLUBILITY; STABILIZATION; SYMMETRY; THERMODYNAMICS; TRANSITION ELEMENTS; WATER

Citation Formats

S.E. Ziemniak. Solubility Behavior and Phase Stability of Transition Metal Oxides in Alkaline Hydrothermal Environments. United States: N. p., 2000. Web. doi:10.2172/821298.
S.E. Ziemniak. Solubility Behavior and Phase Stability of Transition Metal Oxides in Alkaline Hydrothermal Environments. United States. doi:10.2172/821298.
S.E. Ziemniak. Thu . "Solubility Behavior and Phase Stability of Transition Metal Oxides in Alkaline Hydrothermal Environments". United States. doi:10.2172/821298. https://www.osti.gov/servlets/purl/821298.
@article{osti_821298,
title = {Solubility Behavior and Phase Stability of Transition Metal Oxides in Alkaline Hydrothermal Environments},
author = {S.E. Ziemniak},
abstractNote = {The solubility behavior of transition metal oxides in high temperature water is interpreted by recognizing three types of chemical reaction equilibria: metal oxide hydration/dehydration, metal oxide dissolution and metal ion hydroxocomplex formation. The equilibria are quantified using thermodynamic concepts and the thermochemical properties of the metal oxides/ions representative of the most common constituents of construction metal alloys, i.e., element shaving atomic numbers between Z = 22 (Ti) and Z = 30 (Zn), are summarized on the basis of metal oxide solubility studies conducted in the laboratory. Particular attention is devoted to the uncharged metal ion hydrocomplex, M{sup Z}(OH){sub Z}(aq), since its thermochemical properties define minimum solubilities of the metal oxide at a given temperature. Experimentally-extracted values of standard partial molal entropy (S{sup 0}) for the transition metal ion neutral hydroxocomplex are shown to be influenced by ligand field stabilization energies and complex symmetry.},
doi = {10.2172/821298},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {5}
}