World's Best Scientists 2026 revealed!

D-Index & Metrics

Chemistry

D-Index
63
Citations
15287
World Ranking
8359
National Ranking
2413

Robert T. Downs publication distribution in Chemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Chemistry in 2026. The highlighted bar marks where Robert T. Downs sits on this spectrum.

61–80 publications: 66 scientists 81–100 publications: 302 scientists 101–120 publications: 623 scientists 121–140 publications: 918 scientists 141–160 publications: 1,218 scientists 161–180 publications: 1,350 scientists 181–200 publications: 1,344 scientists 201–220 publications: 1,281 scientists 221–240 publications: 1,216 scientists 241–260 publications: 1,100 scientists 261–280 publications: 979 scientists 281–300 publications: 939 scientists 301–320 publications: 764 scientists 321–340 publications: 643 scientists 341–360 publications: 628 scientists 361–380 publications: 522 scientists 381–400 publications: 459 scientists 401–420 publications: 397 scientists 421–440 publications: 327 scientists 441–460 publications: 270 scientists 461–480 publications: 265 scientists 481–500 publications: 252 scientists 501–520 publications: 201 scientists 521–540 publications: 185 scientists 541–560 publications: 148 scientists 561–580 publications: 148 scientists 581–600 publications: 132 scientists 601–620 publications: 114 scientists 621–640 publications: 104 scientists 641–660 publications: 91 scientists 661–680 publications: 92 scientists 681–700 publications: 73 scientists 701–720 publications: 57 scientists 721–740 publications: 54 scientists 741–760 publications: 67 scientists 761–780 publications: 45 scientists 781–800 publications: 46 scientists 801–820 publications: 39 scientists 821–840 publications: 32 scientists 841–860 publications: 36 scientists 861–880 publications: 29 scientists 881–900 publications: 26 scientists 901–920 publications: 24 scientists 921–940 publications: 14 scientists 941–960 publications: 23 scientists 961–980 publications: 28 scientists 981–1,000 publications: 15 scientists 1,001–1,020 publications: 29 scientists 1,021–1,040 publications: 12 scientists 1,041–1,060 publications: 19 scientists 1,061–1,080 publications: 12 scientists 1,081–1,100 publications: 6 scientists 1,101–1,120 publications: 8 scientists 1,121–1,140 publications: 12 scientists 1,141–1,160 publications: 5 scientists 1,161–1,180 publications: 6 scientists 1,181–1,200 publications: 14 scientists 1,201–1,220 publications: 7 scientists 1,221–1,240 publications: 2 scientists 1,241–1,260 publications: 6 scientists 1,261–1,280 publications: 4 scientists 1,281–1,294 publications: 6 scientists 1,295+ publications: 100 scientists
61 publications 1,295+

This scientist: 349 publications — 73rd percentile

73% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,295 publications or more.

Robert T. Downs D-index placement in Chemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Chemistry scientists ranked by Research.com in 2026. The highlighted bar marks where Robert T. Downs sits on this spectrum.

40–41 D-Index: 289 scientists 42–43 D-Index: 612 scientists 44–45 D-Index: 808 scientists 46–47 D-Index: 776 scientists 48–49 D-Index: 835 scientists 50–51 D-Index: 861 scientists 52–53 D-Index: 872 scientists 54–55 D-Index: 933 scientists 56–57 D-Index: 1,051 scientists 58–59 D-Index: 930 scientists 60–61 D-Index: 882 scientists 62–63 D-Index: 834 scientists 64–65 D-Index: 731 scientists 66–67 D-Index: 775 scientists 68–69 D-Index: 683 scientists 70–71 D-Index: 646 scientists 72–73 D-Index: 561 scientists 74–75 D-Index: 501 scientists 76–77 D-Index: 437 scientists 78–79 D-Index: 388 scientists 80–81 D-Index: 354 scientists 82–83 D-Index: 292 scientists 84–85 D-Index: 275 scientists 86–87 D-Index: 254 scientists 88–89 D-Index: 235 scientists 90–91 D-Index: 185 scientists 92–93 D-Index: 192 scientists 94–95 D-Index: 155 scientists 96–97 D-Index: 163 scientists 98–99 D-Index: 125 scientists 100–101 D-Index: 105 scientists 102–103 D-Index: 105 scientists 104–105 D-Index: 112 scientists 106–107 D-Index: 88 scientists 108–109 D-Index: 68 scientists 110–111 D-Index: 69 scientists 112–113 D-Index: 65 scientists 114–115 D-Index: 79 scientists 116–117 D-Index: 61 scientists 118–119 D-Index: 44 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 40 scientists 124–125 D-Index: 33 scientists 126–127 D-Index: 26 scientists 128–129 D-Index: 34 scientists 130–131 D-Index: 35 scientists 132–133 D-Index: 25 scientists 134–135 D-Index: 27 scientists 136–137 D-Index: 17 scientists 138–139 D-Index: 16 scientists 140–141 D-Index: 20 scientists 142–143 D-Index: 20 scientists 144–145 D-Index: 15 scientists 146–147 D-Index: 9 scientists 148–149 D-Index: 9 scientists 150–151 D-Index: 16 scientists 152–153 D-Index: 11 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 3 scientists 158 D-Index: 3 scientists 159+ D-Index: 98 scientists
40 D-Index 159+

This scientist: 63 D-Index — 54th percentile

54% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 159 D-Index or more.

Research.com Recognitions

  • 2009 - Fellow of the American Association for the Advancement of Science (AAAS)

Overview

Robert T. Downs is affiliated with the University of Arizona in the United States. Their research spans multiple fields, primarily focusing on Materials Science and Physics and Astronomy. Within these disciplines, Downs' work encompasses several subfields, including Astronomy and Astrophysics, Electronic, Optical and Magnetic Materials, Materials Chemistry, Geochemistry and Petrology, and Artificial Intelligence.

The main topics covered in Downs' research include:

  • Planetary Science and Exploration
  • Crystal Structures and Properties
  • Astro and Planetary Science
  • Mineralogy and Gemology Studies
  • Geochemistry and Geologic Mapping
  • Radioactive element chemistry and processing
  • Geological and Geochemical Analysis

Downs has contributed to numerous publications, with a significant presence in key scientific venues. The frequent publication outlets include:

  • Abstracts with programs - Geological Society of America
  • The Canadian Journal of Mineralogy and Petrology
  • Mineralogical Magazine
  • The Canadian Mineralogist
  • Journal of Geophysical Research Planets

Recent papers authored or co-authored by Downs or collaborators associated with their research include:

  • Mineralogy and geochemistry of sedimentary rocks and eolian sediments in Gale crater, Mars: A review after six Earth years of exploration with Curiosity, 2020, Geochemistry
  • Mineralogy of Vera Rubin Ridge From the Mars Science Laboratory CheMin Instrument, 2020, Journal of Geophysical Research Planets
  • Brine-driven destruction of clay minerals in Gale crater, Mars, 2021, Science
  • Evidence for Multiple Diagenetic Episodes in Ancient Fluvial-Lacustrine Sedimentary Rocks in Gale Crater, Mars, 2020, Journal of Geophysical Research Planets
  • Exploring Carbon Mineral Systems: Recent Advances in C Mineral Evolution, Mineral Ecology, and Network Analysis, 2020, Frontiers in Earth Science

Downs collaborates frequently with other researchers, including:

  • Shaunna M. Morrison
  • Robert M. Hazen
  • T. F. Bristow
  • E. B. Rampe
  • D. T. Vaniman

In recognition of their contributions to science, Downs was named a Fellow of the American Association for the Advancement of Science (AAAS) in 2009.

Best Publications

  • Crystallography Open Database - an open-access collection of crystal structures

    Saulius Gražulis;Daniel Chateigner;Robert T. Downs;A. F. T. Yokochi

  • The American Mineralogist crystal structure database

    Robert T. Downs;Michelle Hall-Wallace

  • Topology of the pyroxenes as a function of temperature, pressure, and composition as determined from the procrystal electron density

    Robert T. Downs

  • Volatile and organic compositions of sedimentary rocks in Yellowknife Bay, Gale crater, Mars.

    Douglas W. Ming;P. D. Archer;D. P. Glavin;J. L. Eigenbrode

  • Morphology-tuned wurtzite-type ZnS nanobelts.

    Zhongwu Wang;Luke L. Daemen;Yusheng Zhao;C. S. Zha

  • Characterization and Calibration of the CheMin Mineralogical Instrument on Mars Science Laboratory

    David Blake;David Vaniman;Cheries Achilles;Robert Anderson

  • Interactive software for calculating and displaying X-ray or neutron powder diffractometer patterns of crystalline materials

    R. T. Downs;K. L. Bartelmehs;G. V. Gibbs;M. B. Boisen

  • Mineralogy and geochemistry of sedimentary rocks and eolian sediments in Gale crater, Mars: A review after six Earth years of exploration with Curiosity

    E. B. Rampe;D. F. Blake;D. F. Blake;T. F. Bristow;T. F. Bristow;D. W. Ming

  • Mineralogy, provenance, and diagenesis of a potassic basaltic sandstone on Mars: CheMin X-ray diffraction of the Windjana sample (Kimberley area, Gale Crater)

    Allan H. Treiman;David L. Bish;David T. Vaniman;Steve J. Chipera

  • An efficient rapid system for profiling the cellular activities of molecular libraries

    Jonathan S. Melnick;Jeff Janes;Sungjoon Kim;Jim Y. Chang

  • A quenchable superhard carbon phase synthesized by cold compression of carbon nanotubes

    Zhongwu Wang;Yusheng Zhao;Kimberly Tait;Kimberly Tait;Xiaozhou Liao

  • Multiple stages of aqueous alteration along fractures in mudstone and sandstone strata in Gale Crater, Mars

    A. S. Yen;D. W. Ming;D. T. Vaniman;R. Gellert

  • The pressure behavior of alpha cristobalite

    R. T. Downs;D. C. Palmer

  • High-pressure x-ray diffraction and Raman spectroscopic studies of the tetragonal spinel CoFe 2 O 4

    Zhongwu Wang;Zhongwu Wang;Robert T Downs;V. Pischedda;R. Shetty

  • High pressure single-crystal micro X-ray diffraction analysis with GSE_ADA/RSV software

    Przemyslaw Dera;Kirill Zhuravlev;Vitali Prakapenka;Mark L. Rivers

  • Goethite, α-FeO(OH), from single-crystal data

    Hexiong Yang;Ren Lu;Robert T. Downs;Gelu Costin

  • High-Temperature and High-Pressure Crystal Chemistry

    Robert M. Hazen;Robert T. Downs

  • Discovery of the recoverable high-pressure iron oxide Fe4O5

    Barbara Lavina;Przemyslaw Dera;Eunja Kim;Yue Meng

  • High-Temperature–High- Pressure Diffractometry

    R. J. Angel;R. T. Downs;L. W. Finger

  • Power law relationships between bond length, bond strength and electron density distributions

    G. V. Gibbs;F. C. Hill;M. B. Boisen;R. T. Downs

Frequent Co-Authors

Robert M. Hazen
Robert M. Hazen Carnegie Institution for Science
David F. Blake
David F. Blake Ames Research Center
Steve J. Chipera
Steve J. Chipera Planetary Science Institute
Allan H. Treiman
Allan H. Treiman Lunar and Planetary Institute
A. S. Yen
A. S. Yen Jet Propulsion Lab
Richard V. Morris
Richard V. Morris Langley Research Center
John P. Grotzinger
John P. Grotzinger California Institute of Technology
David J. Des Marais
David J. Des Marais Ames Research Center
Jack D. Farmer
Jack D. Farmer Arizona State University
Joy A. Crisp
Joy A. Crisp Jet Propulsion Lab

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