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81 Post Transition Metal
Tl

Thallium

RIS 0.032
Velocity
Rank#53
Co-citedTc
Physical properties
Category Post Transition Metal
Block p-block
State Solid
Config [Xe] 4f14 5d10 6s2 6p1
Electronegativity 1.62
Density 11.85 g/cm³
Melting 577.0 K
Boiling 1746.0 K
Ionization 589.4 kJ/mol
Oxidation +1, +3
Discovered 1861 · William Crookes
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
2024 · 100th percentile for its age
International Journal of Environmental Analytical Chemistry · 2025 · 96th percentile for its age
Current Issues in Molecular Biology · 2025 · 96th percentile for its age
Top papers, last 5 years
2024 · 100th percentile for its age
International Journal of Environmental Analytical Chemistry · 2025 · 96th percentile for its age
Current Issues in Molecular Biology · 2025 · 96th percentile for its age
Newest papers
Talanta · 2026 · 97th percentile for its age
Clinical Toxicology · 2026 · 92nd percentile for its age
Geochimica et Cosmochimica Acta · 2026 · 92nd percentile for its age

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Thallium's history

Research intensity over time

Thallium's history

Thallium's research intensity, 1900 → today.

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Advanced visualization features

Thallium's associations

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

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