https://traveller.m9s5ever.co.uk/index.php?action=history&feed=atom&title=Template%3AInfobox_tantalum
Template:Infobox tantalum - Revision history
2026-10-18T14:07:24Z
Revision history for this page on the wiki
MediaWiki 1.38.7
https://traveller.m9s5ever.co.uk/index.php?title=Template:Infobox_tantalum&diff=1856&oldid=prev
imported>JCW-CleanerBot: /* top */task, replaced: Acta Crystallographica Section B → Acta Crystallographica Section B:
2022-07-25T10:26:56Z
<p><span dir="auto"><span class="autocomment">top: </span><a href="/index.php?title=User:JCW-CleanerBot&action=edit&redlink=1" class="new" title="User:JCW-CleanerBot (page does not exist)">task</a>, replaced: Acta Crystallographica Section B → Acta Crystallographica Section B:</span></p>
<p><b>New page</b></p><div>{{Infobox element<br />
|number=73<br />
|symbol=Ta<br />
|name=tantalum<br />
|abundance=<br />
|abundance in earth's crust=<br />
|abundance in oceans=<br />
|abundance in solar system=<br />
|left=[[hafnium]]<br />
|right=[[tungsten]]<br />
|above=[[niobium|Nb]]<br />
|below=[[dubnium|Db]]<br />
|image name=Tantalum_single_crystal_and_1cm3_cube.jpg<br />
|appearance=gray blue<br />
|electrons per shell=2, 8, 18, 32, 11, 2<br />
|phase=<br />
|density gpcm3nrt=16.69<br />
|density gpcm3mp=15<br />
|melting point K=3290<br />
|melting point C=3017<br />
|melting point F=5463<br />
|boiling point K=5731<br />
|boiling point C=5458<br />
|boiling point F=9856<br />
|heat fusion=36.57<br />
|heat vaporization=753<br />
|heat capacity=25.36<br />
|vapor pressure 1=3297<br />
|vapor pressure 10=3597<br />
|vapor pressure 100=3957<br />
|vapor pressure 1 k=4395<br />
|vapor pressure 10 k=4939<br />
|vapor pressure 100 k=5634<br />
|vapor pressure comment=<br />
|crystal structure=body-centered cubic<br />
|crystal structure ref=<ref name="crystal structure">{{Cite journal | doi = 10.1107/S0567740873004140 | title = The crystal structure of β-tantalum | year = 1973 | last1 = Moseley | first1 = P. T. | last2 = Seabrook | first2 = C. J. | journal = Acta Crystallographica Section B: Structural Crystallography and Crystal Chemistry | volume = 29 | issue = 5 | pages = 1170–1171}}</ref><br />
|crystal structure comment=&alpha;-Ta<br />
|crystal structure 2=tetragonal<br />
|crystal structure 2 ref=<ref name="crystal structure"/><br />
|crystal structure 2 comment=&beta;-Ta<br />
|electronegativity=1.5<br />
|number of ionization energies=2<br />
|ionization energy 1=761<br />
|ionization energy 2=1500<br />
|atomic radius=146<br />
|covalent radius=170±8<br />
|magnetic ordering=[[paramagnetic]]<br />
|magnetic ordering ref=<ref name=magnet>{{cite book |url=https://web.archive.org/web/20110303222309/http://www-d0.fnal.gov/hardware/cal/lvps_info/engineering/elementmagn.pdf|chapter=Magnetic susceptibility of the elements and inorganic compounds| editor = Lide, D. R. | title = CRC Handbook of Chemistry and Physics | edition = 86th | location = Boca Raton (FL) | publisher = CRC Press | year = 2005 | isbn = 0-8493-0486-5 }}<br />
</ref><br />
|electrical resistivity unit prefix=n<br />
|electrical resistivity at 20=131<br />
|thermal conductivity=57.5<br />
|thermal expansion at 25=6.3<br />
|speed of sound rod at 20=3400<br />
|magnetic susceptibility= {{val|+154.0|e=−6}}<br />
|magnetic susceptibility ref= &#x20;(293&nbsp;K)<ref>{{Cite book|title=CRC, Handbook of Chemistry and Physics|last=Weast|first=Robert|publisher=Chemical Rubber Company Publishing|year=1984|isbn=0-8493-0464-4|location=Boca Raton, Florida|pages=E110}}</ref><br />
|Young's modulus=186<br />
|Shear modulus=69<br />
|Bulk modulus=200<br />
|Poisson ratio=0.34<br />
|Mohs hardness=6.5<br />
|Vickers hardness=870–1200<br />
|Brinell hardness=440–3430<br />
|CAS number=7440-25-7<br />
|isotopes=<br />
{{Infobox element/isotopes decay | mn=177 | sym=Ta<br />
|na=[[synthetic radioisotope|syn]] | hl=56.56&nbsp;h<br />
|dm=[[electron capture|ε]] | de=1.166 | link1=hafnium-177 | pn=177 | ps=Hf}}<br />
{{Infobox element/isotopes decay | mn=178 | sym=Ta<br />
|na=syn | hl=2.36&nbsp;h<br />
|dm=ε | de=1.910 | link1=hafnium-178 | pn=178 | ps=Hf}}<br />
{{Infobox element/isotopes decay | mn=179 | sym=Ta<br />
|na=syn | hl=1.82&nbsp;y<br />
|dm=ε | de=0.110 | link1=hafnium-179 | pn=179 | ps=Hf}}<br />
{{Infobox element/isotopes decay2 | mn=180 | sym=Ta<br />
|na=syn | hl=8.125&nbsp;h<br />
|dm1=ε | de1=0.854 | link1=hafnium-180 | pn1=180 | ps1=Hf<br />
|dm2=[[beta emission|β<sup>−</sup>]] | de2=0.708 | link2=Isotopes of tungsten | pn2=180 | ps2=W}}<br />
{{Infobox element/isotopes stable | mn=180[[Nuclear isomer|m]] | sym=Ta | na=0.012% | n=107 | firstlinks=yes}}<br />
{{infobox element/isotopes stable | mn=181 | sym=Ta | na=99.988% | n=108 | firstlinks=no }}<br />
{{Infobox element/isotopes decay | mn=182 | sym=Ta<br />
|na=syn | hl=114.43&nbsp;d<br />
|dm=β<sup>−</sup> | de=1.814 | link1=Isotopes of tungsten | pn=182 | ps=W}}<br />
{{Infobox element/isotopes decay | mn=183 | sym=Ta<br />
|na=syn | hl=5.1&nbsp;d<br />
|dm=β<sup>−</sup> | de=1.070 | link1=Isotopes of tungsten | pn=183 | ps=W}}<br />
|isotopes comment=<br />
|discovered by=[[Anders Gustaf Ekeberg]]<br />
|discovery date=1802<br />
|history comment label=Recognized as a distinct [[chemical element|element]] by<br />
|history comment=[[Heinrich Rose]] (1844)<br />
|QID=Q1123<br />
}}<!--<br />
<br />
--><noinclude><br />
{{Infobox element/element navigation|symbol=Ta}}<br />
{{template reference list}}<br />
{{documentation|1=Template:Infobox element/doc}}<br />
</noinclude></div>
imported>JCW-CleanerBot