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77 Transition Metal
Ir

Iridium

RIS 0.018
Velocity
Rank#72
Co-citedRh
Physical properties
Category Transition Metal
Block d-block
State Solid
Config [Xe] 4f14 5d7 6s2
Electronegativity 2.2
Density 22.56 g/cm³
Melting 2719.0 K
Boiling 4701.0 K
Ionization 880.0 kJ/mol
Oxidation +1, +2, +3, +4, +5, +6
Discovered 1803 · Smithson Tennant
10-year trends

Research trends from the past decade for this element.

Research trends from the past decade: publication rate, citation momentum, emerging applications. A bird's-eye view of how the field has been evolving.

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Top papers of all time
Science · 2025 · 100th percentile for its age
Science · 2025 · 100th percentile for its age
ACS Catalysis · 2025 · 100th percentile for its age
Top papers, last 5 years
Science · 2025 · 100th percentile for its age
Science · 2025 · 100th percentile for its age
ACS Catalysis · 2025 · 100th percentile for its age
Newest papers
Journal of the American Chemical Society · 2026 · 99th percentile for its age
Energy Materials · 2026 · 99th percentile for its age
Nature Nanotechnology · 2026 · 99th percentile for its age

These are the nine that matter most. There are more — browse all of them free.

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Iridium's history

Research intensity over time

Iridium's history

Iridium's research intensity, 1900 → today.

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Advanced visualization features

Iridium's associations

These shapes are citation clusters: groups of papers that cite each other. They show why Iridium is moving, not just that it is.

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