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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 63 8359 7593 2413 2005 349 15287

Robert T. Downs publications per year

The chart shows the history of publications by Robert T. Downs between 1988 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Robert T. Downs published across 38 years, from 1988 to 2025, averaging 14.2 papers a year. Output peaked at 38 publications in 2016. 23 of the 539 publications appeared in the last two years.

No. of publications
10 20 30
Bar chart. Horizontal axis: year, 1988 to 2025. Vertical axis: number of publications, 0 to 38. Peak 38 publications in 2016. 1988: 1 publication 1989: 0 publications 1990: 2 publications 1991: 1 publication 1992: 2 publications 1993: 3 publications 1994: 8 publications 1995: 3 publications 1996: 8 publications 1997: 9 publications 1998: 7 publications 1999: 1 publication 2000: 8 publications 2001: 8 publications 2002: 2 publications 2003: 13 publications 2004: 8 publications 2005: 12 publications 2006: 16 publications 2007: 17 publications 2008: 23 publications 2009: 18 publications 2010: 13 publications 2011: 21 publications 2012: 20 publications 2013: 31 publications 2014: 21 publications 2015: 24 publications 2016: 38 publications 2017: 31 publications 2018: 30 publications 2019: 35 publications 2020: 21 publications 2021: 19 publications 2022: 18 publications 2023: 24 publications 2024: 14 publications 2025: 9 publications
1988 2025

539 publications in total across all disciplines

View publications per year as a table
Robert T. Downs: publications per year, 1988 to 2025
Year Publications
1988 1
1989 0
1990 2
1991 1
1992 2
1993 3
1994 8
1995 3
1996 8
1997 9
1998 7
1999 1
2000 8
2001 8
2002 2
2003 13
2004 8
2005 12
2006 16
2007 17
2008 23
2009 18
2010 13
2011 21
2012 20
2013 31
2014 21
2015 24
2016 38
2017 31
2018 30
2019 35
2020 21
2021 19
2022 18
2023 24
2024 14
2025 9
Total 539
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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.

No. of scientists
250 500 750 1,000 1,250
Bar chart with 63 bars. Horizontal axis: publications, 61–80 to 1,295+. Vertical axis: number of scientists, 0 to 1,350. Most scientists, 1,350, have 161–180 publications. The last bar groups every scientist with 1,295 publications or more. The highlighted bar, 341–360 publications, is where this scientist sits. 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
61–80 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.

View publications distribution as a table
Number of Chemistry scientists by publication count, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
Publications Scientists This scientist
61–80 66
81–100 302
101–120 623
121–140 918
141–160 1,218
161–180 1,350
181–200 1,344
201–220 1,281
221–240 1,216
241–260 1,100
261–280 979
281–300 939
301–320 764
321–340 643
341–360 628 349
361–380 522
381–400 459
401–420 397
421–440 327
441–460 270
461–480 265
481–500 252
501–520 201
521–540 185
541–560 148
561–580 148
581–600 132
601–620 114
621–640 104
641–660 91
661–680 92
681–700 73
701–720 57
721–740 54
741–760 67
761–780 45
781–800 46
801–820 39
821–840 32
841–860 36
861–880 29
881–900 26
901–920 24
921–940 14
941–960 23
961–980 28
981–1,000 15
1,001–1,020 29
1,021–1,040 12
1,041–1,060 19
1,061–1,080 12
1,081–1,100 6
1,101–1,120 8
1,121–1,140 12
1,141–1,160 5
1,161–1,180 6
1,181–1,200 14
1,201–1,220 7
1,221–1,240 2
1,241–1,260 6
1,261–1,280 4
1,281–1,294 6
1,295+ 100
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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.

No. of scientists
250 500 750 1,000
Bar chart with 61 bars. Horizontal axis: D-Index, 40–41 to 159+. Vertical axis: number of scientists, 0 to 1,051. Most scientists, 1,051, have 56–57 D-Index. The last bar groups every scientist with 159 D-Index or more. The highlighted bar, 62–63 D-Index, is where this scientist sits. 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
40–41 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.

View D-Index distribution as a table
Number of Chemistry scientists by D-index, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
D-Index Scientists This scientist
40–41 289
42–43 612
44–45 808
46–47 776
48–49 835
50–51 861
52–53 872
54–55 933
56–57 1,051
58–59 930
60–61 882
62–63 834 63
64–65 731
66–67 775
68–69 683
70–71 646
72–73 561
74–75 501
76–77 437
78–79 388
80–81 354
82–83 292
84–85 275
86–87 254
88–89 235
90–91 185
92–93 192
94–95 155
96–97 163
98–99 125
100–101 105
102–103 105
104–105 112
106–107 88
108–109 68
110–111 69
112–113 65
114–115 79
116–117 61
118–119 44
120–121 37
122–123 40
124–125 33
126–127 26
128–129 34
130–131 35
132–133 25
134–135 27
136–137 17
138–139 16
140–141 20
142–143 20
144–145 15
146–147 9
148–149 9
150–151 16
152–153 11
154–155 9
156–157 3
158 3
159+ 98
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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, 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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