Praseodymium hexaboride

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{{chembox
| Watchedfields = changed
| verifiedrevid = 462088835
| ImageFile = CaHexaboride.jpg
| ImageSize =
| IUPACName =
| OtherNames = Praseodymium boride
|Section1={{Chembox Identifiers
| CASNo = 12008-27-4
| CASNo_Ref = {{cascite|correct|CAS}}
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
| ChemSpiderID = 21241507
| StdInChI_Ref = {{stdinchicite|correct|chemspider}}
| StdInChI = 1S/6B.Pr
| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}
| StdInChIKey = QHGDJAMSTQXPDI-UHFFFAOYSA-N
| PubChem =
| EC_number = 234-534-2
| SMILES =
}}
|Section2={{Chembox Properties
| Formula = LaB<sub>6</sub>
| MolarMass = 205.77 g/mol
| Appearance = black crystals
| Density = 4.84 g/cm<sup>3</sup>
| MeltingPt = 2610&nbsp;°C<ref>{{книга
|заглавие = Справочник химика |издание = 3-е изд., испр |ответственный = Редкол.: Никольский Б.П. и др. |место = Л.
|издательство = Химия |год = 1971 |том = 2 |страниц = 1168
}}</ref>
| BoilingPt =
}}
|Section3={{Chembox Structure
| CrystalStruct = Cubic
| SpaceGroup = P''m<span style="text-decoration: overline">3</span>m'' ; O<sub>h</sub>
}}
|Section7={{Chembox Hazards
| MainHazards =
| FlashPt =
| AutoignitionPt =
}}
}}

'''Praseodymium hexaboride''' is a binary inorganic compound of [[praseodymium]] and [[boron]] with the formula PrB<sub>6</sub>. 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:

:{{chem2|Pr + 6B -> PrB6}}

== Properties ==

Praseodymium hexaboride forms black crystals of the [[cubic crystal system]], with [[space group]] P m3m, cell parameters a = 0.4129 nm, Z = 1, and structure isotypical with [[calcium hexaboride]].<ref>{{книга
|заглавие = Справочник химика |издание = 2-е изд., испр |ответственный = Редкол.: Никольский Б.П. и др. |место = М.-Л.
|издательство = Химия |год = 1966 |том = 1 |страниц = 1072
}}</ref> The compound melts congruently at 2610&nbsp;°C.<ref>{{книга
|заглавие = Руководство по неорганическому синтезу: В 6-ти т. |ответственный = Ред. Брауэр Г. |место = М.
|издательство = Мир |год = 1985 |том = 4 |страниц = 447
}}</ref> At temperatures below 7&nbsp;K, a magnetic transition to an antiferromagnetic state occurs in the compound.<ref>{{статья
|автор = 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
|заглавие = Подавление спонтанной намагниченности в парамагнитной фазе PrB{{sub|6}}
|ссылка = http://conf.mirea.ru/CD2012/pdf/p2/39.pdf
|язык =
|издание = Материалы Международной научно-технической конференции
|год = 2012
|том =
|номер =
|страницы = 160-163
|doi =
|issn =
|archivedate = 2015-04-12
|archiveurl = https://web.archive.org/web/20150412194233/http://conf.mirea.ru/CD2012/pdf/p2/39.pdf
}}</ref><ref>{{статья
|автор = H. Hacker Jr., Y. Shimada, K. S. Chung
|заглавие = Magnetic properties of CeB{{sub|6}}, PrB{{sub|6}}, EuB{{sub|6}}, and GdB{{sub|6}}
|ссылка =
|язык =
|издание = Physica Status Solidi (a)
|год = 1971
|том = 4
|номер = 2
|страницы = 459–465
|doi = 10.1002/pssa.2210040221
|issn =
}}</ref><ref>{{статья
|автор = М.А. Анисимов, А.В. Богач, В.В. Глушков, С.В. Демишев, Н.А. Самарин, В.Б. Филипов, Н.Ю. Шицевалова, Н.Е. Случанко
|заглавие = Новая магнитная фаза в гексабориде празеодима
|ссылка = https://mipt.ru/upload/154/9-12-arphcxl1tgs.pdf
|язык =
|издание = Труды МФТИ. — . — Том , № (5)
|год = 2010
|том = 2
|номер = 1
|страницы = 9-12
|doi =
|issn =
|archivedate = 2014-07-19
|archiveurl = https://web.archive.org/web/20140719125430/http://mipt.ru/upload/154/9-12-arphcxl1tgs.pdf
}}</ref> It does not dissolve in water.

== Uses ==

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

== References ==
{{reflist}}

{{Praseodymium compounds}}
{{Borides}}

[[Category:praseodymium(III) compounds]]
[[Category:Borides]]

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