Hackberry – Celtis occidentalis

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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.

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. ^ Справочник химика. Vol. 2 (3-е изд., испр ed.). Л.: Химия. 1971. {{cite book}}: Unknown parameter |agency= ignored (help)
  2. ^ Справочник химика. Vol. 1 (2-е изд., испр ed.). М.-Л.: Химия. 1966. {{cite book}}: Unknown parameter |agency= ignored (help)
  3. ^ Руководство по неорганическому синтезу: В 6-ти т. Vol. 4. М.: Мир. 1985. {{cite book}}: Unknown parameter |agency= ignored (help)
  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)CS1 maint: date and year (link) CS1 maint: multiple names: authors list (link)
  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)CS1 maint: date and year (link) CS1 maint: multiple names: authors list (link)
  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)CS1 maint: date and year (link) CS1 maint: multiple names: authors list (link)
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