Praseodymium hexaboride

Last updated
Praseodymium hexaboride
CaHexaboride.jpg
Names
Other names
Praseodymium boride
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.031.382 OOjs UI icon edit-ltr-progressive.svg
EC Number
  • 234-534-2
PubChem CID
  • InChI=1S/6B.Pr Yes check.svgY
    Key: QHGDJAMSTQXPDI-UHFFFAOYSA-N Yes check.svgY
  • [B].[B].[B].[B].[B].[B].[Pr]
Properties
PrB6
Molar mass 205.77 g/mol
Appearanceblack crystals
Density 4.84 g/cm3
Melting point 2610 °C [1]
Structure
Cubic
Pm3m ; Oh
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Praseodymium hexaboride is a binary inorganic compound of praseodymium and boron with the formula PrB6. It forms black crystals that are insoluble in water.

Contents

Preparation

Praseodymium hexaboride can be prepared from the reaction of stoichiometric quantities of praseodymium and boron:

Pr + 6B → PrB6

Properties

Praseodymium hexaboride forms black crystals of the cubic crystal system, with space group Pm3m, cell parameters a = 0.4129 nm, Z = 1, and structure isotypical with calcium hexaboride. [2] The compound melts congruently at 2610 °C. [3] At temperatures below 7 K, a magnetic transition to an antiferromagnetic state occurs in the compound. [4] [5] [6] It does not dissolve in water.

Uses

Praseodymium hexaboride is used as a component of alloys for cathodes of high-power electronic devices.

References

  1. ↑ Никольский Б.П. и др., ed. (1971). Справочник химика. Vol. 2 (3-е изд., испр ed.). Л.: Химия.
  2. ↑ Никольский Б.П. и др., ed. (1966). Справочник химика. Vol. 1 (2-е изд., испр ed.). М.-Л.: Химия.
  3. ↑ Брауэр Г., ed. (1985). Руководство по неорганическому синтезу: В 6-ти т. Vol. 4. М.: Мир.
  4. ↑ М.А. Анисимов; А.В. Кузнецов; А.В. Богач; В.В. Глушков; С.В. Демишев; Н.А. Самарин; Н.Ю. Шицевалова; А.В. Левченко; В.Б. Филипов; Н.Е. Случанко (2012). "Подавление спонтанной намагниченности в парамагнитной фазе PrB6" (PDF) (Материалы Международной научно-технической конференции ed.): 160–163. Archived from the original (PDF) on 2015-04-12.{{cite journal}}: Cite journal requires |journal= (help)
  5. ↑ H. Hacker Jr.; Y. Shimada; K. S. Chung (1971). "Magnetic properties of CeB6, PrB6, EuB6, and GdB6". 4 (2) (Physica Status Solidi A ed.): 459–465. doi:10.1002/pssa.2210040221.{{cite journal}}: Cite journal requires |journal= (help)
  6. ↑ М.А. Анисимов; А.В. Богач; В.В. Глушков; С.В. Демишев; Н.А. Самарин; В.Б. Филипов; Н.Ю. Шицевалова; Н.Е. Случанко (2010). "Новая магнитная фаза в гексабориде празеодима" (PDF). 2 (1) (Труды МФТИ. — . — Том , № (5) ed.): 9–12. Archived from the original (PDF) on 2014-07-19.{{cite journal}}: Cite journal requires |journal= (help)
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