خواص

CAS Number7429-91-6
PubChem CID23912
شعاع اتمی۱۷۸
حجم اتمی۱۹
عدد جرمی۱۶۲٫۵
بلوکf
نقطه جوش۲٬۵۶۷
Bulk Modulus
دستهلانتانیدها
ساختار کریستالیشش ضلعی ساده
رنگنقره ای
شعاع کووالانسی۱۹۲
چگالی۸٫۵۵
Electrical Resistivity
ساختار الکترونی[Xe] 4f10 6s2
الکترون های هر لایه2, 8, 18, 28, 8, 2
الکترونگاتیویته۱٫۲۲
Electrons66
گروهna
گرمای همجوشی۱۱٫۱
گرمای تبخیر۲۸۰
پتانسیل یونیزاسیون۵٫۹۳۹
Magnetic Ordering
Magnetic Susceptibility
جرم۱۶۲٫۵
Mass Number66
نقطه ذوب۱٬۴۰۷
نامدیسپروزیم
نوترون ها97
عدد اتمی163
حالات اکسید شدن2, 3
تناوب6
جنسجامد
Poisson Ratio
پروتون ها66
Shear Modulus
ظرفیت گرمایی ویژه۰٫۱۷
نمادDy
رسانایی گرما۰٫۱۰۷
Van der Waals radius
Young's Modulus
فراوانی
فراوانی در پوسته زمین0.00062%
فراوانی در جهان2×10-7%
Dy دیسپروزیم 66 162.5 6 f 66 1412.0 2567.0 [Xe] 4f10 6s2 2 8 18 28 8 2 8.55 0.00062% Silver Hexagonal 1.2 {"1":"573.0","2":"1130","3":"2200","4":"3990"} 573 50 3 1.8 19.0 230.0 0.173 10.7 178.K 0 Solid, Paramagnetic, Conductor, Lanthanide, Stable, Natural dis-PRO-si-em Soft, lustrous, silvery metal. Its uses are limited to the experimental and esoteric. Usually found with erbium, holmium and other rare earths in some minerals such as monazite sand, which is often 50% rare earth by weight. hFfR_qOSa-8 Dysprosium
Tellurium was discovered in Transylvania in 1782 by Franz-Joseph Müller von Reichenstein in a mineral containing tellurium and gold.

In 1789, another Hungarian scientist, Pál Kitaibel, also discovered the element independently in an ore from Deutsch-Pilsen which had been regarded as argentiferous molybdenite.

In 1798, it was named by Martin Heinrich Klaproth who earlier isolated it from the mineral calaverite. From the Latin word tellus, earth 66 1886 Paul Emile Lecoq de Boisbaudran France From the Greek word "dysprositos" meaning "hard to obtain"

ایزوتوپ‌های تلوریم

Standard Atomic Weight

162.500(1)

ایزوتوپ های پایدار

156Dy 158Dy 160Dy 161Dy 162Dy 163Dy 164Dy

ایزوتوپ های ناپایدار

138Dy 139Dy 140Dy 141Dy 142Dy 143Dy 144Dy 145Dy 146Dy 147Dy 148Dy 149Dy 150Dy 151Dy 152Dy 153Dy 154Dy 155Dy 157Dy 159Dy 165Dy 166Dy 167Dy 168Dy 169Dy 170Dy 171Dy 172Dy 173Dy

Tellurium and tellurium compounds are considered to be mildly toxic
In air, tellurium burns with a greenish-blue flames, forming the dioxide
The primary use of tellurium is in alloys, foremost in steel and copper to improve machinability.

Tellurium is used as a basic ingredient in blasting caps, and is added to cast iron for chill control.

It is used in vulcanizing rubber and in catalysts for petroleum cracking.

Tellurium is used as a coloring agent in ceramics.