Praseodymium (IV) oxide

Crystal structure
__ Pr 4+      __ O 2−
General
Surname	Praseodymium (IV) oxide
other names	Praseodymium dioxide
Ratio formula	PrO 2
Brief description	brown-black solid
External identifiers / databases
CAS number 12036-05-4 EC number 234-838-5 ECHA InfoCard 100,031,658 PubChem 82846 Wikidata Q4332855
properties
Molar mass	172.91 g mol −1
Physical state	firmly
density	7.32 g cm −3
safety instructions
GHS hazard labeling no classification available
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Praseodymium (IV) oxide is an inorganic chemical compound of praseodymium from the group of oxides .

Extraction and presentation

Praseodymium (IV) oxide can be obtained from lower praseodymium oxides, especially from praseodymium (III, IV) oxide, by heating in oxygen at high pressure. Under normal pressure, the connection can be made by solvolytic disproportionation .

${\displaystyle {\ce {Pr6O11 -> 4 PrO2 + Pr2O3}}}$

properties

Praseodymium (IV) oxide is a brown-black solid. It splits off oxygen at temperatures above 200 ° C and has a crystal structure of the calcium fluoride type (a = 539.3 pm).

Individual evidence

1. ↑ ^{a b c d e} Georg Brauer (Ed.), With the collaboration of Marianne Baudler u. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 1081.
2. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.