Manganese (II, III) oxide

Crystal structure
	__ Mn 2+ __ Mn 3+ __ O 2−
General
Surname	Manganese (II, III) oxide
other names	Manganese Oxide; Trimanganese tetroxide; red manganese oxide;
Ratio formula	Mn 3 O 4
Brief description	dark red-brown to black odorless powder
External identifiers / databases
EC number	215-266-5
ECHA InfoCard	100,013,879
PubChem	14825
ChemSpider	14140
Wikidata	Q410985
properties
Molar mass	228.81 g mol −1
Physical state	firmly
density	4.86 g cm −3
Melting point	1705 ° C
boiling point	2847 ° C
solubility	almost insoluble in water
safety instructions
GHS labeling of hazardous substances Caution
H and P phrases	H: 315-319-335
	P: 261-305 + 351 + 338
MAK	0.2 mg m −3
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Manganese (II, III) oxide , also known as trimanganese tetroxide, is an oxide of manganese in which the metal occurs in oxidation states + II and + III. It belongs to the class of spinels , which have the general formula AB ₂ Ch ₄ . A is a metal in the + II oxidation state, B a metal in the + III oxidation state and Ch is a chalcogen in the -II oxidation state, usually oxygen or sulfur .

Occurrence

Manganese (II, III) oxide occurs naturally in the mineral hausmannite .

Extraction and presentation

Manganese (II, III) oxide is formed when manganese dioxide (MnO ₂ ) decomposes at high temperatures and when organo-manganese compounds such as methylcyclopentadienyl-manganese-tricarbonyl (MMT) are burned .

properties

Manganese (II, III) oxide crystallizes in a spinel structure that is tetragonally distorted by the Jahn-Teller effect .

use

Manganese (II, III) oxide is used as a feed additive as well as for the production of semiconductors and magnetic materials.

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g ^h Entry for CAS no. 1317-35-7 in the GESTIS substance database of the IFA , accessed on April 1, 2017 (JavaScript required)

↑ www.oehha.ca.gov ( Memento of the original from October 13, 2009 in the Internet Archive ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. (PDF; 24 kB) @1@ 2

^ AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 102nd edition. Walter de Gruyter, Berlin 2007, ISBN 978-3-11-017770-1 , pp. 1614-1615.

↑ http://eur-lex.europa.eu/ (PDF)

[GESTIS-1] ↑ ^a ^b ^c ^d ^e ^f ^g ^h Entry for CAS no. 1317-35-7 in the GESTIS substance database of the IFA , accessed on April 1, 2017 (JavaScript required)