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List of works by Harold C. Helgeson

A chemical and thermodynamic model of oil generation in hydrocarbon source rocks

scientific article published in February 2009

Activity/composition relations among silicates and aqueous solutions; I, Thermodynamics of intrasite mixing and substitutional order/disorder in minerals

scientific article published in November 1985

Biomolecules in hydrothermal systems: Calculation of the standard molal thermodynamic properties of nucleic-acid bases, nucleosides, and nucleotides at elevated temperatures and pressures

scientific article published in September 2006

Calculation of activity coefficients and degrees of formation of neutral ion pairs in supercritical electrolyte solutions

scientific article published in May 1991

Calculation of dissociation constants and the relative stabilities of polynuclear clusters of 1:1 electrolytes in hydrothermal solutions at supercritical pressures and temperatures

scientific article published in June 1993

Calculation of mass transfer among minerals and aqueous solutions as a function of time and surface area in geochemical processes. I. computational approach

scientific article published in February 1983

Calculation of the Standard Molal Thermodynamic Properties of Crystalline, Liquid, and Gas Organic Molecules at High Temperatures and Pressures

scientific article published in March 1998

Calculation of the standard molal thermodynamic properties of aqueous biomolecules at elevated temperatures and pressures II. Unfolded proteins

scientific article published in April 2000

Calculation of the standard molal thermodynamic properties of aqueous biomolecules at elevated temperatures and pressures Part 1L-α-Amino acids

scientific article published in 1997

Calculation of the standard partial molal thermodynamic properties of KCl0 and activity coefficients of aqueous KCl at temperatures and pressures to 1000°C and 5 kbar

scientific article published in June 1997

Calculation of the thermodynamic and geochemical consequences of nonideal mixing in the system H2O-CO2-NaCl on phase relations in geologic systems: Equation of state for H2O-CO2-NaCl fluids at high pressures and temperatures

scientific article

Calculation of the thermodynamic and transport properties of aqueous species at high pressures and temperatures: Aqueous tracer diffusion coefficients of ions to 1000°C and 5 kb

scientific article published in January 1988

Calculation of the thermodynamic and transport properties of aqueous species at high pressures and temperatures: Correlation algorithms for ionic species and equation of state predictions to 5 kb and 1000°C

scientific article

Calculation of the thermodynamic and transport properties of aqueous species at high pressures and temperatures: Standard partial molal properties of inorganic neutral species

scientific article

Calculation of the thermodynamic and transport properties of aqueous species at high pressures and temperatures: Standard partial molal properties of organic species

scientific article published in April 1990

Calculation of the thermodynamic and transport properties of aqueous species at high pressures and temperatures: dissociation constants for supercritical alkali metal halides at temperatures from 400 to 800.degree.C and pressures from 500 to 4000 bar

scientific article published in March 1988

Calculation of the thermodynamic and transport properties of aqueous species at high pressures and temperatures; revised equations of state for the standard partial molal properties of ions and electrolytes

scientific article published in January 1988

Calculation of the thermodynamic consequences of dehydration in subducting oceanic crust to 100 kb and > 800 degrees C

scientific article published in May 1978

Calculation of the thermodynamic properties and relative stabilities of aqueous acetic and chloroacetic acids, acetate and chloroacetates, and acetyl and chloroacetyl chlorides at high and low temperatures and pressures

scientific article published in July 1992

Calculation of the thermodynamic properties at elevated temperatures and pressures of saturated and aromatic high molecular weight solid and liquid hydrocarbons in kerogen, bitumen, petroleum, and other organic matter of biogeochemical interest

scientific article published in December 1998

Calculation of the thermodynamic properties of aqueous silica and the solubility of quartz and its polymorphs at high pressures and temperatures

scientific article published in December 1977

Calculation of the thermodynamic properties of aqueous silica and the solubility of quartz and its polymorphs at high pressures and temperatures; discussion and reply

scientific article published in November 1979

Calculation of the thermodynamic properties of aqueous species at high pressures and temperatures. Effective electrostatic radii, dissociation constants and standard partial molal properties to 1000 °C and 5 kbar

article by Everett L. Shock et al published 1992 in Journal of the Chemical Society, Faraday Transactions

Calculation of the transport properties of aqueous species at pressures to 5 KB and temperatures to 1000°C

scholarly article by Eric H Oelkers published in July 1989

Chemical and thermodynamic constraints on the hydrothermal transport and deposition of tin: I. Calculation of the solubility of cassiterite at high pressures and temperatures

scientific article published in January 1985

Chemical and thermodynamic constraints on the hydrothermal transport and deposition of tin; II, Interpretation of phase relations in the Southeast Asian tin belt

scientific article published in August 1985

Chemical interaction of aqueous solutions with epidote-feldspar mineral assemblages in geologic systems; 1, Thermodynamic analysis of phase relations in the system CaO-FeO-Fe 2 O 3 -Al 2 O 3 -SiO 2 -H 2 O-CO 2

scientific article published in November 1980

Chemical interaction of aqueous solutions with epidote-feldspar mineral assemblages in geologic systems; II, Equilibrium constraints in metamorphic/geothermal processes

scientific article published in May 1981

Description and interpretation of metasomatic phase relations at high pressures and temperatures; 1, Equilibrium activities of ionic species in nonideal mixtures of CO 2 and H 2 O

scientific article published in September 1980

Description and interpretation of phase relations in geochemical processes involving aqueous solutions

scientific article published in May 1970

Effects of complex formation in flowing fluids on the hydrothermal solubilities of minerals as a function of fluid pressure and temperature in the critical and supercritical regions of the system H2O

scientific article published in August 1992

Equilibrium and mass transfer during progressive metamorphism of siliceous dolomites

scientific article published in March 1983

Errata II; Thermodynamics of minerals, reactions, and aqueous solutions at high pressures and temperatures

scientific article published in November 1985

Erratum to Geochim. Cosmochim

scientific article published in January 1989

Estimation of the dielectric constant of H2O from experimental solubilities of quartz, and calculation of the thermodynamic properties of aqueous species to 900°C at 2 kb

scientific article published in November 1984

Estimation of the standard molal heat capacities, entropies and volumes of 2:1 clay minerals

scientific article published in November 1994

Exact and numerical solutions to the moving boundary problem resulting from reversible heterogeneous reactions and aqueous diffusion in a porous medium

scientific article published on 10 June 1986

FORTRAN programs for generating fluid inclusion isochores and fugacity coefficients for the system H2O-CO2-NaCl at high pressures and temperatures

scientific article published in January 1985

Geologic and thermodynamic characteristics of the Salton Sea geothermal system

scientific article published in March 1968

Group additivity equations of state for calculating the standard molal thermodynamic properties of aqueous organic species at elevated temperatures and pressures

scientific article published in January 1997

Interdiffusion with multiple precipitation/dissolution reactions: Transient model and the steady-state limit

scientific article published in September 1986

Ionization Constants In Aqueous Solutions

Kinetic and thermodynamic constraints on phase relations among minerals, petroleum, and aqueous solutions in diagenetic processes

scientific article published in August 1988

Kinetics of mass transfer among silicates and aqueous solutions

scientific article published in May 1971

Metasomatic phase relations in dolomites of the Adamello Alps

scientific article published in February 1984

Multiple ion association in supercritical aqueous solutions of single electrolytes

scientific article published on 01 August 1993

Petroleum, oil field waters, and authigenic mineral assemblages Are they in metastable equilibrium in hydrocarbon reservoirs

scientific article published in July 1993

Phase relations among silicates, copper iron sulfides, and aqueous solutions at magmatic temperatures

scientific article published in November 1985

Prediction of the thermodynamic properties of aqueous metal complexes to 1000 degrees C and 5 kb.

scientific article

Prediction of the thermodynamic properties of electrolytes at high pressures and temperatures

scientific article published in January 1981

Quantifying the energetics of metabolic reactions in diverse biogeochemical systems: electron flow and ATP synthesis

scientific article published in June 2007

Relative stabilities of biomolecules at high temperatures and pressures

scientific article published in October 1994

Response to 'Group additivity calculations of the thermodynamic properties of unfolded proteins in aqueous solution: a critical comparison of peptide-based and HKF models'

scientific article published on 01 February 2001

SUPCRT92: A software package for calculating the standard molal thermodynamic properties of minerals, gases, aqueous species, and reactions from 1 to 5000 bar and 0 to 1000°C

scientific article published in August 1992

Silicate-sea water equilibria in the ocean system

scientific article published in October 1970

Solubilities of the common L-α-amino acids as a function of temperature and solution pH

scientific article published in January 1997

Solubility of petroleum in oil-field waters as a function of the oxidation state of the system

scholarly article

Summary of the Apparent Standard Partial Molal Gibbs Free Energies of Formation of Aqueous Species, Minerals, and Gases at Pressures 1 to 5000 Bars and Temperatures 25 to 1000 °C

scientific article published in July 1995

Surfaces of reacted minerals

scientific article published in Nature

Temperature, pressure, and electrochemical constraints on protein speciation: Group additivity calculation of the standard molal thermodynamic properties of ionized unfolded proteins

scientific article published on 21 July 2006

The energetics of metabolism in hydrothermal systems: Calculation of the standard molal thermodynamic properties of magnesium-complexed adenosine nucleotides and NAD and NADP at elevated temperatures and pressures

scientific article published in September 2006

Theoretical prediction of the thermodynamic behavior of aqueous electrolytes at high pressures and temperatures; I, Summary of the thermodynamic/electrostatic properties of the solvent

scientific article published in December 1974

Theoretical prediction of the thermodynamic behavior of aqueous electrolytes at high pressures and temperatures; II, Debye-Huckel parameters for activity coefficients and relative partial molal properties

scientific article published in December 1974

Theoretical prediction of the thermodynamic behavior of aqueous electrolytes by high pressures and temperatures; IV, Calculation of activity coefficients, osmotic coefficients, and apparent molal and standard and relative partial molal properties to

scientific article published in December 1981

Theoretical prediction of the thermodynamic properties of aqueous electrolytes at high pressures and temperatures. III. Equation of state for aqueous species at infinite dilution

scientific article published in February 1976

Thermodynamic and kinetic constraints on reaction rates among minerals and aqueous solutions. II. Rate constants, effective surface area, and the hydrolysis of feldspar

scientific article published in December 1984

Thermodynamic and kinetic constraints on reaction rates among minerals and aqueous solutions. III. Activated complexes and the pH-dependence of the rates of feldspar, pyroxene, wollastonite, and olivine hydrolysis

scientific article published in December 1987

Thermodynamic and kinetic constraints on reaction rates among minerals and aqueous solutions; I, Theoretical considerations

scientific article published in March 1982

Thermodynamic and kinetic constraints on reaction rates among minerals and aqueous solutions; IV, Retrieval of rate constants and activation parameters for the hydrolysis of pyroxene, wollastonite, olivine, andalusite, quartz, and nepheline

scientific article published in January 1989

Thermodynamic properties of aqueous species and the solubilities of minerals at high pressures and temperatures: the system Al2O3H2OKOH

scientific article published in May 1997

Thermodynamics of hydrothermal systems at elevated temperatures and pressures

scientific article published in September 1969

Thermodynamics of minerals, reactions, and aqueous solutions at high pressures and temperatures; errata

scientific article published in September 1982

Thermodynamics of the abiotic synthesis of aqueous organic species at high temperatures

scientific article published in September 1986

Triple-ion anions and polynuclear complexing in supercritical electrolyte solutions

scientific article published in March 1990

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