Holmiyum
67
Ho
Grup
yok
Periyot
6
Blok
f
Protonlar
Elektronlar
Nötronlar
67
67
98
Temel Özellikleri
Atom numarası
67
Atom ağırlığı
164,93032
Kütle Numarası
165
Kategori
Lantanit
Renk
Gümüşi
Radyoaktif
Hayir
From the Latin word Holmia meaning Stockholm
Kristal yapısı
Basit altıgen
Tarihi
Holmium was discovered by Swiss chemists Marc Delafontaine and Jacques-Louis Soret in 1878.
They noticed the aberrant spectrographic absorption bands of the then-unknown element.
Later in 1878, Per Teodor Cleve independently discovered the element while he was working on erbia earth.
They noticed the aberrant spectrographic absorption bands of the then-unknown element.
Later in 1878, Per Teodor Cleve independently discovered the element while he was working on erbia earth.
Enerji seviyesi başına Elektronlar
2, 8, 18, 29, 8, 2
Elektron dizilimi
[Xe] 4f11 6s2
Holmium has the highest magnetic strength of any naturally occurring element
Fiziksel Özellikleri
Faz
Katı
Yoğunluk
8,795 g/cm3
Ergime noktası
1734,15 K | 1461 °C | 2661,8 °F
Kaynama noktası
2993,15 K | 2720 °C | 4928 °F
Ergime ısısı
17 kJ/mol
Buharlaşma ısısı
265 kJ/mol
Isı kapasitesi
0,165 J/g·K
Dünya kabuğundaki bulunulabilirliği
0,00012%
Evrendeki bulunulabilirliği
5×10-8%
CAS Numarası
7440-60-0
PubChem CID Numarası
23988
Atom Özellikleri
Atom yarıçapı
176 pm
Kovalent yarıçapı
192 pm
Elektronegatifliği
1,23 (Pauling ölçeği)
İyonlaşma enerjisi
6,0215 eV
Atomik Hacim
18,7 cm3/mol
Isıl iletkenlik
0,162 W/cm·K
Yükseltgenme seviyeleri
3
Uygulamalar
Holmium is used to create the strongest artificially generated magnetic fields, when placed within high-strength magnets as a magnetic pole piece.
It is one of the colorants used for cubic zirconia and glass, providing yellow or red coloring.
Holmium isotopes are good neutron absorbers and are used in nuclear reactor control rods.
It is one of the colorants used for cubic zirconia and glass, providing yellow or red coloring.
Holmium isotopes are good neutron absorbers and are used in nuclear reactor control rods.
Holmium is considered to be of low toxicity
İzotoplar
Kararlı izotoplar
165HoKararsız izotoplar
140Ho, 141Ho, 142Ho, 143Ho, 144Ho, 145Ho, 146Ho, 147Ho, 148Ho, 149Ho, 150Ho, 151Ho, 152Ho, 153Ho, 154Ho, 155Ho, 156Ho, 157Ho, 158Ho, 159Ho, 160Ho, 161Ho, 162Ho, 163Ho, 164Ho, 166Ho, 167Ho, 168Ho, 169Ho, 170Ho, 171Ho, 172Ho, 173Ho, 174Ho, 175Ho