haf·ni·um

(hăf′nē-əm)

n. Symbol Hf

A brilliant, silvery, metallic element separated from ores of zirconium and used in nuclear reactor control rods, as a getter for oxygen and nitrogen, and in tungsten filament alloys. Atomic number 72; atomic weight 178.49; melting point 2,233°C; boiling point 4,603°C; specific gravity 13.31; valence 4. See Periodic Table.

[After Hafnia, Medieval Latin name for Copenhagen, Denmark.]

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

hafnium

(ˈhæfnɪəm)

(Elements & Compounds) a bright metallic element found in zirconium ores: used in tungsten filaments and as a neutron absorber in nuclear reactors. Symbol: Hf; atomic no: 72; atomic wt: 178.49; valency: 4; relative density: 13.31; melting pt: 2231±20°C; boiling pt: 4603°C

[C20: New Latin, named after Hafnia, Latin name of Copenhagen + -ium]

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

haf•ni•um

(ˈhæf ni əm, ˈhɑf-)

n.

a toxic metallic element found in most zirconium minerals. Symbol: Hf; at. wt.: 178.49; at. no.: 72; sp. gr.: 12.1.

[1923; < New Latin Hafn(ia) Copenhagen + -ium²]

haf·ni·um

(hăf′nē-əm)

Symbol Hf A bright, silvery metallic element that occurs in zirconium ores. Because hafnium absorbs neutrons better than any other metal and is resistant to corrosion, it is used to control nuclear reactions. Atomic number 72. See Periodic Table.

The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

ThesaurusAntonymsRelated WordsSynonymsLegend:

Noun

hafnium - a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons

atomic number 72, Hf

metal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.

Translations

hafnium

Hafnium

άφνιο

hafnio

hafnio

hafnium

hafnij

hafnium

hafnín

afnio

ハフニウム

hafnium

hafnis

hafnium

hafnium

hafn

háfnio

hafniu

гафний

hafnium

hafnij

hafnium

hafniyum

hafnium

[ˈhæfnɪəm] N → hafnio m

Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005

hafnium

n (Chem) → Hafnium nt

Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007

Mentioned in

References in periodicals archive

The latest report on the global Hafnium market suggests a positive growth rate in the coming years.

Global Hafnium Market 2019

Qureshi, Simultaneous Determination of Hafnium and Zirconium in Low Grade Uranium Ores using INAA J.

Liquid-Liquid Extraction of Uranium from Nitric Acid Solution Using N, N-Di(2-ethyl-hexyl) hexanamide (DOHA) in Dodecane as Extractant

Ban, "In-pile experiment of a new hafnium aluminide composite material to enable fast neutron testing in the advanced test reactor (INL/CON-10-17879)," in Proceedings of the ICAPP '10, San Diego, Calif, USA, 2010.

Preliminary Selection of Device Materials to Locally Transform Thermal into SFR Neutron Spectrum

The coatings in the form of single layer of hafnium nitride (HfN) have been developed for use in the electronic industry, which explains why there is few literature concerning the mechanical and tribological properties.

Machining With Cutting Tool Coated With Monolayer of HfN/Mecanizado con Herramienta de Corte Recubierta con Monocapa de HfN

It depends on precursors containing highly purified, rare metals such as hafnium, iridium or zirconium, very little of which actually makes their way into the finished product.

Curtailing inefficient semiconductor precursors

One such element, hafnium, is essential for the iPhone's transistors.

The all-American iPhone: political candidates opposed to free trade say Apple should make phones in the United States. let's see what that would look like

It was observed that (Aluminum, Arsenic, Barium, Bromine, Calcium, Cerium, Cobalt, Chromium, Cesium, Copper, Iron, Gallium, Hafnium, Lanthanum, Manganese, Molybdenum, Niobium, Neodymium, Nickel, Lead, Rubidium, Antimony, Scandium, Selenium, Silicon, Tin, Strontium, Samarium, Tantalum, Titanium, Uranium, Vanadium, Tungsten, Ytterbium, Zink and Zirconium) elements were present in all the coal samples under investigation.

Removal of trace elements from Thar coal to minimize its hazardous effect on the environment

Structural, optical and photocatalytic properties of hafnium doped zinc oxide nanophotocatalyst.

Preparation, characterisation and photocatalytic activity of La-doped ZnO nanopowders synthesised using auto-combustion

Hafnium is a metal included in group IV the in the periodic table, jointly with titanium and zirconium and is used widely in biological applications.

Insights into the binding of hafnium oxide nanoparticles to human serum albumin by various optical spectroscopy studies