Osmium (Os) is a transition metal with atomic number 76: a neutral osmium atom has 76 protons and 76 electrons. Atomic mass 190.23 u, electron configuration [Xe] 4f14 5d6 6s2. Osmium is the densest naturally occurring element at 22.587 g/cm3.
As of 2026-09-25 · the last 10 years
Research intensity has held steady at about 74% of the element's own all-time peak, which occurred in 1972, well before this window.
Research intensity ran from about 74% of the element's own all-time peak in 2016 to about 74% in 2026 — a rise to a mid-window peak followed by a fall back, and the all-time peak (1972) lies before this window. Over the same span its share of research attention across all elements held steady. Among the 118 elements, osmium has a larger-than-average research literature.
The number of papers involving the element rose from about 3,587 in 2016 to about 5,148 in 2025 (1.44x). That is slower than the literature as a whole grew over the same years, so the element lost ground in the wider body of research even as its own count rose.
The literature is composed of three distinct research communities, each where osmium plays a specific, often specialized role. The largest group, representing about 14% of the element's recent research, focuses on Osmium Arene Complexes as Photodynamic Therapy Agents. These papers synthesize osmium arene and polypyridyl complexes to serve as photosensitizers for photodynamic therapy and inducing cell death. Osmium is a minor presence in this much larger community, with under 1% of its papers involving osmium, yet it holds a steady share of the element's own work. A key 2022 paper in the Journal of the American Chemical Society on luminescent and photofunctional transition metal complexes, cited over 280 times, anchors this area, alongside a 2026 review in Progress in Materials Science on osmium-based materials for biomedical applications, cited about 7 times.
A second community, accounting for about 8% of recent research, uses Osmium Isotopes for Siderophile Element Constraints. Here, osmium isotopes and Re-Os geochronology track highly siderophile platinum-group elements to constrain mantle processes and metal mineralization. Osmium is again a minor presence in a much larger community, with under 1% of its papers involving the element. This share has remained steady. A 2022 Science Advances paper on Archean cratonic mantle recycled at a mid-ocean ridge, cited about 71 times, and a 2026 Geochimica et Cosmochimica Acta study on chromite and osmium isotope compositions, cited about 9 times, illustrate this geochemical focus.
The third material community, holding about 7% of the element's research, involves Osmium-Catalyzed Asymmetric Dihydroxylation in Organic Synthesis. These papers utilize osmium tetroxide and tetraaryl complexes for enantioselective dihydroxylation, distinct from the community's dominant palladium and nickel cross-coupling reactions. Osmium is a minor presence in this community as well, with under 1% of its papers involving the element. A 2022 Journal of the American Chemical Society paper on overcoming photochemical limitations in metallaphotoredox catalysis, cited over 110 times, and a 2024 JACS paper on photocatalytic activation of aryl diazos, cited about 62 times, highlight the element's role in these synthetic methods.
Overall, the composition of osmium research has remained stable, with all three named communities holding steady shares of the element's literature. The remaining 71% of research belongs to other communities too small to name individually. For a deeper look at the current standing of osmium research, see the Last 12 Months and Executive Brief reports.
What changed in the past year: new papers, shifting applications, emerging collaborators. See the momentum over a shorter window than the decade view.
Personal →See recent trends — Personal.
A by-topic status read of what changed and what's new — built for decision-makers, not search engines. Citation clusters, emerging applications, and the papers that matter most.
Professional →See the executive read — Professional.
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