O. J. Kleppa

13.4k total citations · 2 hit papers
311 papers, 10.7k citations indexed

About

O. J. Kleppa is a scholar working on Organic Chemistry, Materials Chemistry and Mechanical Engineering. According to data from OpenAlex, O. J. Kleppa has authored 311 papers receiving a total of 10.7k indexed citations (citations by other indexed papers that have themselves been cited), including 143 papers in Organic Chemistry, 134 papers in Materials Chemistry and 119 papers in Mechanical Engineering. Recurrent topics in O. J. Kleppa's work include Chemical Thermodynamics and Molecular Structure (140 papers), Thermal and Kinetic Analysis (70 papers) and Intermetallics and Advanced Alloy Properties (59 papers). O. J. Kleppa is often cited by papers focused on Chemical Thermodynamics and Molecular Structure (140 papers), Thermal and Kinetic Analysis (70 papers) and Intermetallics and Advanced Alloy Properties (59 papers). O. J. Kleppa collaborates with scholars based in United States, China and Poland. O. J. Kleppa's co-authors include S.V. Meschel, Alexandra Navrotsky, Robert C. Newton, T.V. Charlu, Létitia Topor, Qiti Guo, Shunroku Watanabe, J. L. Holm, Krzysztof Fitzner and Woo‐Gwang Jung and has published in prestigious journals such as Science, Journal of the American Chemical Society and The Journal of Chemical Physics.

In The Last Decade

O. J. Kleppa

310 papers receiving 9.8k citations

Hit Papers

The thermodynamics of cation distributions in simple spinels 1967 2026 1986 2006 1967 1980 100 200 300 400 500
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. The thermodynamics of cation distributions in simple spinels
    1967 531 citations Alexandra Navrotsky, O. J. Kleppa profile →
  2. Thermochemistry of the high structural state plagioclases
    1980 484 citations Robert C. Newton, T.V. Charlu et al. Geochimica et Cosmochimica Acta profile →

Peers

O. J. Kleppa
Yoshio Waseda Japan
Molly Gleiser
E. Parthé Switzerland
Ihsan Barin Germany
O. Kubaschewski Germany
Brent Fultz United States
J. M. Wills United States
Edgar F. Westrum United States
M. W. Chase United States
R L McGreevy Sweden
Yoshio Waseda Japan
O. J. Kleppa
Citations per year, relative to O. J. Kleppa O. J. Kleppa (= 1×) peers Yoshio Waseda

Countries citing papers authored by O. J. Kleppa

Since Specialization
Citations

This map shows the geographic impact of O. J. Kleppa's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by O. J. Kleppa with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites O. J. Kleppa more than expected).

Fields of papers citing papers by O. J. Kleppa

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by O. J. Kleppa. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by O. J. Kleppa. The network helps show where O. J. Kleppa may publish in the future.

Co-authorship network of co-authors of O. J. Kleppa

This figure shows the co-authorship network connecting the top 25 collaborators of O. J. Kleppa. A scholar is included among the top collaborators of O. J. Kleppa based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with O. J. Kleppa. O. J. Kleppa is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Meschel, S.V. & O. J. Kleppa. (2003). Thermochemistry of some binary alloys of gold with the lanthanide metals by high temperature direct synthesis calorimetry. Journal of Alloys and Compounds. 363(1-2). 242–247. 23 indexed citations
2.
Nash, Philip, Hsin‐Ning Su, & O. J. Kleppa. (2002). Enthalpies of formation of compounds in Al-Ni-Y system. 12(4). 754–758. 11 indexed citations
3.
Guo, Qiti & O. J. Kleppa. (1996). Standard enthalpies of formation of dysprosium alloys, Dy + Me (Me = Ni, Ru, Rh, Pd, lr, and Pt), by high-temperature direct synthesis calorimetry. Metallurgical and Materials Transactions B. 27(3). 417–422. 22 indexed citations
4.
Kleppa, O. J., et al.. (1995). Standard enthalpies of formation of neodymium alloys, Nd + Me (Me {equivalent_to} Ni, Ru, Rh, Pd, Ir, Pt), by high-temperature direct synthesis calorimetry. Metallurgical and Materials Transactions B. 26(2). 1 indexed citations
5.
Zhu, Hui, Robert C. Newton, & O. J. Kleppa. (1994). Enthalpy of formation of wollastonite (CaSiO3) and anorthite (CaAl2Si2O8) by experimental phase equilibrium measurements and high-temperature solution colorimetry. American Mineralogist. 79. 134–144. 29 indexed citations
6.
Fitzner, Krzysztof & O. J. Kleppa. (1994). Thermochemistry of binary alloys of transition metals: The systems Cu-Ce, Me-Pr, and Me-Nd (Me = Cu, Ag, Au). Metallurgical and Materials Transactions A. 25(7). 1495–1500. 49 indexed citations
7.
Jung, Woo‐Gwang & O. J. Kleppa. (1992). Standard molar enthalpies of formation of MeAl (Me = Ru, Rh, Os, Ir). Metallurgical Transactions B. 23(1). 53–56. 51 indexed citations
8.
Fitzner, Krzysztof, N. Selhaoui, & O. J. Kleppa. (1992). Note on the thermochemistry of the Au+V, Au+Nb, and Au+Ta systems. Metallurgical Transactions A. 23(6). 1836–1839. 13 indexed citations
9.
Meschel, S.V. & O. J. Kleppa. (1991). Note on the enthalpies of formation of Cu3Si and Cu3Ge. Metallurgical Transactions A. 22(9). 2162–2165. 19 indexed citations
10.
Bryndzia, L. Taras & O. J. Kleppa. (1989). Standard molar enthalpies of formation of sulfosalts in the Ag-As-S system and thermochemistry of the sulfosalts of Ag with As,Sb,and Bi. American Mineralogist. 74. 243–249. 21 indexed citations
11.
Bryndzia, L. Taras & O. J. Kleppa. (1988). High-temperature reaction calorimetry of solid and liquid phases in part of the quasi-binary system Cu2S-Sb2S3. American Mineralogist. 73. 707–713. 14 indexed citations
12.
Barton, M. D., H. T. Haselton, Bruce S. Hemingway, O. J. Kleppa, & Richard A. Robie. (1982). The thermodynamic properties of fluor'topaz. American Mineralogist. 67. 350–355. 45 indexed citations
13.
Wood, Bernard J., T. J. B. Holland, Robert C. Newton, & O. J. Kleppa. (1980). Thermochemistry of jadeite—diopside pyroxenes. Geochimica et Cosmochimica Acta. 44(9). 1363–1371. 55 indexed citations
14.
Charlu, T.V., Robert C. Newton, & O. J. Kleppa. (1975). Enthalpies of formation at 970 K of compounds in the system MgO-Al2O3-SiO2 from high temperature solution calorimetry. Geochimica et Cosmochimica Acta. 39(11). 1487–1497. 130 indexed citations
15.
Kleppa, O. J., et al.. (1974). High-temperature thermodynamics of the solid solutions of hydrogen in bcc vanadium, niobium, and tantalum. The Journal of Chemical Physics. 61(10). 4048–4058. 85 indexed citations
16.
Dantzer, P. & O. J. Kleppa. (1974). Enthalpies of mixing in the liquid silver halide-alkali halide mixtures. Journal de Chimie Physique. 71. 216–222. 4 indexed citations
17.
Charlu, T.V. & O. J. Kleppa. (1973). High temperature combustion calorimetry. II. Enthalpies of formation of vanadium oxides. 5(4). 260–268. 4 indexed citations
18.
Meschel, S.V. & O. J. Kleppa. (1967). Ternary Excess Enthalpies in Reciprocal Fused Salt Mixtures. IV. Effect of Charge Asymmetry. The Journal of Chemical Physics. 46(5). 1853–1861. 11 indexed citations
19.
Hersh, L. S., Alexandra Navrotsky, & O. J. Kleppa. (1965). Enthalpies of Mixing in Silver Bromide—Alkali Bromide and Thallium Chloride—Alkali Chloride Liquid Mixtures. The Journal of Chemical Physics. 42(11). 3752–3757. 17 indexed citations
20.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by Yoshio Waseda Breakdown of academic impact, for papers by Molly Gleiser Breakdown of academic impact, for papers by E. Parthé Breakdown of academic impact, for papers by Ihsan Barin Breakdown of academic impact, for papers by O. Kubaschewski Breakdown of academic impact, for papers by Brent Fultz Breakdown of academic impact, for papers by J. M. Wills Breakdown of academic impact, for papers by Edgar F. Westrum Breakdown of academic impact, for papers by M. W. Chase Breakdown of academic impact, for papers by R L McGreevy
Rankless by CCL
2026