Europium

Europium, ₆₃Eu
	Garis spektrum europium
Sifat umum
Nama, lambang	europium, Eu
Pengucapan	/êuropium/[1]; /èuropium/;
Penampilan	putih keperakan, dengan warna kuning pucat;[2] tetapi jarang terlihat tanpa perubahan warna oksida
Europium dalam tabel periodik
	samarium ← europium → gadolinium
Nomor atom (Z)	63
Golongan	golongan n/a
Periode	periode 6
Blok	blok-f
Kategori unsur	lantanida
Berat atom standar (Ar)	151,964±0,001; 151,96±0,01 (diringkas);
Konfigurasi elektron	[Xe] 4f7 6s2
Elektron per kelopak	2, 8, 18, 25, 8, 2
Sifat fisik
Fase pada STS (0 °C dan 101,325 kPa)	padat
Titik lebur	1099 K (826 °C, 1519 °F)
Titik didih	1802 K (1529 °C, 2784 °F)
Kepadatan mendekati s.k.	5,264 g/cm3
saat cair, pada t.l.	5,13 g/cm3
Kalor peleburan	9,21 kJ/mol
Kalor penguapan	176 kJ/mol
Kapasitas kalor molar	27,66 J/(mol·K)
Sifat atom
Bilangan oksidasi	0,[3] +2, +3 (oksida agak basa)
Elektronegativitas	Skala Pauling: 1,2
Energi ionisasi	ke-1: 547,1 kJ/mol ; ke-2: 1085 kJ/mol ; ke-3: 2404 kJ/mol
Jari-jari atom	empiris: 180 pm
Jari-jari kovalen	198±6 pm
Lain-lain
Kelimpahan alami	primordial
Struktur kristal	kubus berpusat badan (bcc)
Ekspansi kalor	poli: 35,0 µm/(m·K) (pada s.k.)
Konduktivitas termal	est. 13,9 W/(m·K)
Resistivitas listrik	poli: 0,900 µΩ·m (pada s.k.)
Arah magnet	paramagnetik[4]
Suseptibilitas magnetik molar	+34.000,0×10−6 cm3/mol[5]
Modulus Young	18,2 GPa
Modulus Shear	7,9 GPa
Modulus Bulk	8,3 GPa
Rasio Poisson	0,152
Skala Vickers	165–200 MPa
Nomor CAS	7440-53-1
Sejarah
Penamaan	dari Eropa
Penemuan dan isolasi pertama	E. Demarçay (1896, 1901)
Isotop europium yang utama
β−	152Gd

Europium adalah suatu unsur kimia dalam tabel periodik yang memiliki lambang Eu dan nomor atom 63.

Galeri

Europium

Referensi

"Hasil Pencarian". KBBI Daring. Diakses tanggal 17 Juli 2022.
Greenwood, Norman N.; Earnshaw, A. (1997), Chemistry of the Elements (edisi ke-2), Oxford: Butterworth-Heinemann, hlm. 112, ISBN 0-7506-3365-4
Yttrium and all lanthanides except Ce and Pm have been observed in the oxidation state 0 in bis(1,3,5-tri-t-butylbenzene) complexes, see Cloke, F. Geoffrey N. (1993). "Zero Oxidation State Compounds of Scandium, Yttrium, and the Lanthanides". Chem. Soc. Rev. 22: 17–24. doi:10.1039/CS9932200017. and Arnold, Polly L.; Petrukhina, Marina A.; Bochenkov, Vladimir E.; Shabatina, Tatyana I.; Zagorskii, Vyacheslav V.; Cloke (2003-12-15). "Arene complexation of Sm, Eu, Tm and Yb atoms: a variable temperature spectroscopic investigation". Journal of Organometallic Chemistry. 688 (1–2): 49–55. doi:10.1016/j.jorganchem.2003.08.028.
Lide, D. R., ed. (2005). "Magnetic susceptibility of the elements and inorganic compounds". CRC Handbook of Chemistry and Physics (PDF) (edisi ke-86). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5.
Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. hlm. E110. ISBN 0-8493-0464-4.

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.

[1] "Hasil Pencarian". KBBI Daring. Diakses tanggal 17 Juli 2022.

[2] Greenwood, Norman N.; Earnshaw, A. (1997), Chemistry of the Elements (edisi ke-2), Oxford: Butterworth-Heinemann, hlm. 112, ISBN 0-7506-3365-4

[Cloke1993-3] Yttrium and all lanthanides except Ce and Pm have been observed in the oxidation state 0 in bis(1,3,5-tri-t-butylbenzene) complexes, see Cloke, F. Geoffrey N. (1993). "Zero Oxidation State Compounds of Scandium, Yttrium, and the Lanthanides". Chem. Soc. Rev. 22: 17–24. doi:10.1039/CS9932200017. and Arnold, Polly L.; Petrukhina, Marina A.; Bochenkov, Vladimir E.; Shabatina, Tatyana I.; Zagorskii, Vyacheslav V.; Cloke (2003-12-15). "Arene complexation of Sm, Eu, Tm and Yb atoms: a variable temperature spectroscopic investigation". Journal of Organometallic Chemistry. 688 (1–2): 49–55. doi:10.1016/j.jorganchem.2003.08.028.

[magnet-4] Lide, D. R., ed. (2005). "Magnetic susceptibility of the elements and inorganic compounds". CRC Handbook of Chemistry and Physics (PDF) (edisi ke-86). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5.

[5] Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. hlm. E110. ISBN 0-8493-0464-4.