Iridium

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'S e eileamaid cheimigeach a tha ann an iridium le samhla Ir agus àireamh atamach 77.

Iridium
Iridium-2.jpg
Foidhle iridium
Clàr pillteach
HHe
LiBeBCNOFNe
NaMgAlSiPSClAr
KCaScTiVCrMnFeCoNiCuZnGaGeAsSeBrKr
RbSrYZrNbMoTcRuRhPdAgCdInSnSbTeIXe
CsBa*HfTaWReOsIrPtAuHgTlPbBiPoAtRn
FrRa**RfDbSgBhHsMtDsRgCnNhFlMcLvTsOg
*LaCePrNdPmSmEuGdTbDyHoErTmYbLu
**AcThPaUNpPuAmCmBkCfEsFmMdNoLr
Buadhan
SamhlaIr
Àireamh77
Buidheann9, còbalt
Ùine6
Blocad
SeòrsaMeatailt trastach
Buadhan stuthach
DathAirgead-geal
Teothachd leaghaidh2719 K ​(2446 °C, ​4435 °F)
Teothachd goilidh4403 K ​(4130 °C, ​7466 °F)
Buadhan atamach
Tomad atamach/Da192.217(3)[1]
Comh-dhealbhadh atamach[Xe] 4f14 5d7 6s2
Cor ogsaideachaidh0, +1, +2, +3, +4, +5, +6, +7, +8, +9
−1, −3
1mh lùth aidheonachaidh/kJ mol–1880
2mh lùth aidheonachaidh/kJ mol–11600

'S e meatailt trastach glè cruaidh, tearc agus dlùth ann am buidheann platanum a tha ann.

Chan eil ach dà iosatòp seasmhach agus nàdarra de dh'iridium, 191Ir agus 193Ir.

Eachdraidh

Ann an 1803 lorg Smithson Tennant iridium còmhla ri osmium ann an clach-platanum à Ameireaga a Deas.[2]Dh'ainmich e e air a' bhan-dhia Ghreugach Ἶρις, air sgàth a cho-thàthaidhean dathach.

Cleachdadh

Cleachdar iridium ann an aloidhean airson cathodan, anodan, rong-phlugan agus ann an catailis.

Iomraidhean

  1. Coimisean air Pailteas Iosatòpach agus Tomadan Atamach, Tomadan atamach bun-tomasach (Beurla)
  2. Tennant, Esq., FRS, Smithson (1804): “XVI. On two metals, found in the black powder remaining after the solution of platina,” ann an: Royal Society (Foills.): Phil. Trans. R. Soc. Lond., leabhar 94, td. 411–418. doi:10.1098/rstl.1804.0018.

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