File:Thulium_sublimed_dendritic_and_1cm3_cube.jpg · Wikimedia Commons · See Wikimedia Commons

EntityQ1853· pop 128· linked from 766 articles

tulio

Also known as Tm, element 69, 69Tm

elemento químico de la tabla periódica cuyo símbolo es Tm y su número atómico es 69

OverviewAI-generated

Thulium is a chemical element with the symbol Tm and atomic number 69. Its IUPAC name is thulium, and it is represented by the chemical formula Tm. The element has a mass of 168.934219 and an ionic radius of 1.09. It possesses an electronegativity of 1. The Unicode character for thulium is 銩.

The element was discovered in 1879. In chemical databases, it is identified by the PubChem CID 23961 and the InChIKey FRNOGLGSGLTDKL-UHFFFAOYSA-N. Its molecular weight is listed as 168.93422. Thulium has zero hydrogen bond donors and acceptors, with a topological polar surface area of 0 and a charge of 0. The canonical SMILES representation is [Tm].

Thulium is referenced by 766 other encyclopedia articles. PubMed contains 2600 records associated with the query thulium. The subject is categorized under the Commons category "Thulium" and has a corresponding gallery.

Synthesized by Vinony from 23 facts across 4 sources: Wikidata, PubChem, PubMed, Vinony graph. Generated from structured data (not the Wikipedia text) and checked against those facts — may still contain errors.

In the Vinony graph

Within Vinony's link graph, tulio is referenced by 766 other articles, and connects out to block, lanthanide and thulium(III) oxide.

It sits within the topics Chemical elements, Chemical elements with hexagonal close-packed structure and Commons link is on Wikidata.

Its subject is documented across 127 Wikipedia language editions.

Chemical data

Formula: Tm
Molecular weight: 168.93422 g/mol
IUPAC name: thulium
SMILES: [Tm]
InChIKey: FRNOGLGSGLTDKL-UHFFFAOYSA-N
Polar surface area: 0 Å²
H-bond donors: 0
H-bond acceptors: 0
Formal charge: 0

via PubChem

Research

2,600 papers

Pulsed Thulium:YAG Laser for Lithotripsy.ReviewEuropean urology focus · 2025Hernandez-Gaytan CA, Proietti S, Leonardis F et al.DOI: 10.1016/j.euf.2025.06.002
Thulium Fiber Versus Holmium:Yttrium-aluminum-garnet Laser for Endoscopic Enucleation of the Prostate: A Systematic Review and Meta-analysis.European urology focus · 2024Uleri A, Long Depaquit T, Farré A et al.DOI: 10.1016/j.euf.2024.06.005
Thulium fiber laser in urology: physics made simple.ReviewCurrent opinion in urology · 2022Taratkin M, Azilgareeva C, Cacciamani GE et al.DOI: 10.1097/MOU.0000000000000967
[Thulium or holmium laser or both: where will the journey take us?].ReviewAktuelle Urologie · 2024Becker B, Hook S, Gross AJ et al.DOI: 10.1055/a-2286-1379
Thulium Fiber Laser Behavior on Tissue During Upper- and Lower-Tract Endourology.ReviewCurrent urology reports · 2022Gkolezakis V, Rice P, Somani BK et al.DOI: 10.1007/s11934-022-01117-6
Thulium fibre laser lithotripsy, the new standard?BJU international · 2023Grasso M 3rdDOI: 10.1111/bju.15943
Thulium fiber laser utilization in urological surgery: A narrative review.ReviewInvestigative and clinical urology · 2021Khusid JA, Khargi R, Seiden B et al.DOI: 10.4111/icu.20200467
Thulium fiber laser: the new player for kidney stone treatment? A comparison with Holmium:YAG laser.ReviewWorld journal of urology · 2020Traxer O, Keller EXDOI: 10.1007/s00345-019-02654-5

via PubMed

Wikidata facts

Instance of: chemical element
Part of: period 6
Named after: Scandinavia
Mass: 168.934219
Image: Thulium sublimed dendritic and 1cm3 cube.jpg

Show 15 more facts

Commons category: Thulium
discoverer or inventor: Per Teodor Cleve
topic's main category: Category:Thulium
element symbol: Tm
atomic number: 69
Commons gallery: Thulium
described by source: Granat Encyclopedic Dictionary
ionic radius: 0.99
canonical SMILES: [Tm]
chemical formula: Tm
time of discovery or invention: 1879-00-00
electronegativity: 1
Unicode character: 銩
on focus list of Wikimedia project: Wikipedia:Vital articles/Level/4
topic has template: Template:Infobox thulium

Sources (5)

via Wikidata · CC0

Article · Español

El tulio es un elemento químico de la tabla periódica cuyo símbolo es Tm y su número atómico es 69. En 1879, el químico sueco Per Teodor Cleve separó del óxido de tierras raras erbia otros dos componentes hasta entonces desconocidos, a los que llamó y ; se trataba de los óxidos de holmio y de tulio, respectivamente. En 1911 se obtuvo por primera vez una muestra relativamente pura de tulio metálico. Su nombre procede del antiguo nombre griego de Escandinavia en latín, Thulium. El tulio es el segundo elemento menos abundante de los lantánidos, después del radiactivamente inestable prometio, que sólo se encuentra en en la Tierra. Es un metal fácil de trabajar con un lustre gris plateado brillante. Es bastante blando y se empaña lentamente en el aire. A pesar de su elevado precio y rareza, el tulio se utiliza como fuente de radiación en dispositivos portátiles de rayos X y en algunos láseres de estado sólido. No tiene ninguna función biológica importante y no es especialmente tóxico.

Abstract from DBpedia / Wikipedia · CC BY-SA