rhodium

Also known as Rh, element 45, 45Rh

Rhodium is a chemical element; it has symbol Rh and atomic number 45. It is a very rare, dark silvery-white, hard, corrosion-resistant transition metal. It is a noble metal and a member of the platinum group. It has only one naturally occurring isotope, which is 103Rh. Naturally occurring rhodium is usually found as a free metal or as an alloy with similar metals and rarely as a chemical compound in minerals such as bowieite and rhodplumsite. It is one of the rarest and most valuable precious metals. Rhodium is a group 9 element (cobalt group). It is used for the enhancement of jewelry.

AI overview

Rhodium is a rare, silvery-white metal that belongs to the platinum group and is one of the most valuable precious metals on Earth. It is highly prized for its corrosion resistance and hardness, making it useful for enhancing the appearance and durability of jewelry.

AI-generated from the Wikipedia summary — may contain errors.

Chemical data

Formula: Rh
Molecular weight: 102.9055 g/mol
IUPAC name: rhodium
SMILES: [Rh]
InChIKey: MHOVAHRLVXNVSD-UHFFFAOYSA-N
Polar surface area: 0 Å²
H-bond donors: 0
H-bond acceptors: 0
Formal charge: 0

via PubChem

Research

10,311 papers

Rhodium at the chemistry-biology interface.ReviewDalton transactions (Cambridge, England : 2003) · 2018Ohata J , Ball ZT DOI: 10.1039/c8dt03032d
Homometallic Polynuclear Rhodium Complexes in Anticancer Drug Development.ReviewMini reviews in medicinal chemistry · 2025Kostova IDOI: 10.2174/0113895575416558250822093008
Platinum, palladium, and rhodium in airborne particulate matter.ReviewArhiv za higijenu rada i toksikologiju · 2019Rinkovec JDOI: 10.2478/aiht-2019-70-3293
Rhodium complexes as therapeutic agents.ReviewDalton transactions (Cambridge, England : 2003) · 2016Ma DL, Wang M, Mao Z et al.DOI: 10.1039/c5dt04338g
Rhodium-Catalyzed Synthesis of Organosulfur Compounds Involving S-S Bond Cleavage of Disulfides and Sulfur.ReviewMolecules (Basel, Switzerland) · 2020Arisawa M, Yamaguchi MDOI: 10.3390/molecules25163595
Rhodium-Catalyzed Atroposelective Click Cycloaddition of Azides and Alkynes.Angewandte Chemie (International ed. in English) · 2022Zeng L, Li J, Cui SDOI: 10.1002/anie.202205037
Rhodium(II)-Catalyzed C(sp(3) )-H Diamination of Arylcyclobutanes.Angewandte Chemie (International ed. in English) · 2022Liu X, Wang Z, Wang Q et al.DOI: 10.1002/anie.202205493
Rhodium and its compounds as potential agents in cancer treatment.ReviewCritical reviews in oncology/hematology · 2002Katsaros N, Anagnostopoulou ADOI: 10.1016/s1040-8428(01)00222-0

via PubMed

Wikidata facts

Mass: 102.90549
Image: Rhodium powder pressed melted.jpg

Show 21 more facts

Commons category: Rhodium
element symbol: Rh
atomic number: 45
NIOSH Pocket Guide ID: 0544
density: 12.41
immediately dangerous to life or health: 100
Commons gallery: Rhodium
melting point: 3571
boiling point: 6741
Unicode character: 銠
vapor pressure: 0
time-weighted average exposure limit: 0.1
canonical SMILES: [Rh]
chemical formula: Rh
electrical conductivity: 22300000
time of discovery or invention: 1803-00-00
electronegativity: 2.28
tensile modulus of elasticity: 275000
ionic radius: 0.55
oxidation state: 6
electron configuration: [Kr] 5s¹ 4d⁸

Sources (10)

via Wikidata · CC0

~15 min read

Article

16 sections

Contents

History
Characteristics
Chemical properties
Organorhodium compounds
Isotopes
Occurrence
Mining and price
Used nuclear fuels
Applications
Carbonylation
Ornamental uses
Other uses
Precautions
See also
References
External links

Rhodium is found in platinum or nickel ores with the other members of the platinum group metals. It was discovered in 1803 by William Hyde Wollaston in one such ore, and named for the rose color of one of its chlorine compounds.