Диспросий
66
Dy
Група
Неизвестно
Период
6
Блок
f
Протони
Електрони
Неутрони
66
66
97
Главни свойства
Атомен номер
66
Атомна маса
162.5
Масов номер
163
Категория
Лантаниди
Цвят
Сребърен
Радиоактивни
Не
From the Greek word dysprositos, meaning hard to get at
Кристална структура
Обикновен шестоъгълник
История
French chemist Paul Émile Lecoq de Boisbaudran, while working with holmium oxide, separated dysprosium oxide from it in Paris in 1886.
His procedure for isolating the dysprosium involved dissolving dysprosium oxide in acid, then adding ammonia to precipitate the hydroxide.
It was not isolated in pure form until the development of ion exchange techniques in the 1950s.
His procedure for isolating the dysprosium involved dissolving dysprosium oxide in acid, then adding ammonia to precipitate the hydroxide.
It was not isolated in pure form until the development of ion exchange techniques in the 1950s.
Електрон на обвивка
2, 8, 18, 28, 8, 2
Електронна конфигурация
[Xe] 4f10 6s2
Naturally occurring dysprosium is composed of 7 isotopes
Физични свойства
Фаза
Твърди
Плътност
8.55 g/cm3
Температура на топене
1680.15 K | 1407 °C | 2564.6 °F
Температура на кипене
2840.15 K | 2567 °C | 4652.6 °F
Топлина на сливането
11.1 kJ/mol
Топлина на изпаряване
280 kJ/mol
Специфичен топлинен капацитет
0.17 J/g·K
Изобилие в земната кора
0.00062%
Изобилие в вселената
2×10-7%
Номер на CAS
7429-91-6
Номер на PubChem CID
23912
Атомни свойства
Атомен радиус
178 pm
Ковалентен радиус
192 pm
Електроотрицателност
1.22 (Скала на Полинг)
Йонизационен потенциал
5.9389 eV
Моларен обем
19.0 cm3/mol
Топлопроводимост
0.107 W/cm·K
Оксидационни държави
2, 3
Приложения
Dysprosium oxide-nickel cermets are used in neutron-absorbing control rods in nuclear reactors.
Dysprosium is used in data storage applications such as compact discs and hard discs.
It is also used in dosimeters for measuring ionizing radiation.
Dysprosium iodide and dysprosium bromide are used in high intensity metal-halide lamps.
Dysprosium is used in data storage applications such as compact discs and hard discs.
It is also used in dosimeters for measuring ionizing radiation.
Dysprosium iodide and dysprosium bromide are used in high intensity metal-halide lamps.
Dysprosium is considered to be moderately toxic
Изотопи
Стабилни изотопи
156Dy, 158Dy, 160Dy, 161Dy, 162Dy, 163Dy, 164DyНестабилни изотопи
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