MANGANESE(IV) OXIDE - (1313-13-9)

Introduction

Name: manganese(IV) oxide; manganese dioxide
* IUPAC
CAS Number: 1313-13-9
Chemical Formula: MnO2
Molar Mass: 86.936849 g
Mass Percent: Mn 63.193 %; O 36.806 % 

Classification

• inorganic

Uses/Function

• "...MnO2 is used in dry cells (flashlight "batteries") and as an oxidant in the chemical industry." 1

• "The mineral is the source of manganese and all its comp[oun]ds; largely used in manuf[acturing] manganese steel; oxidizer; in alkaline batteries (dry cells); for making amethyst glass, decolorizing glass; painting on porcelain, faience and majolica. The ppt [precipitate] is used in electrotechnics, pigments, browning gun barrels, drier for paints and varnishes, printing and dyeing textiles. " 2

Bonding

Bonding: ionic
Ionic Character: 57.27 %

Thermochemistry

ΔHf° (s): -124.29 kcal/mol 3 = -520.03 kJ/mol
S° (s): 12.68 cal/(mol•K) 4 = 53.05 J/(mol•K)
ΔGf° (s): -111.18 kcal/mol 5 = -465.18 kJ/mol

Reactions

For More Information

Sources

(1) - Swaddle, T.W. Inorganic Chemistry; Academic Press: San Diego, 1997; p 8.
(2) - The Merck Index: An Encyclopedia of Chemicals, Drugs, and Biologicals, 13th ed.; Budavari, S.; O'Neil, M.J.; Smith, A.; Heckelman, P. E.; Kinneary, J. F., Eds.; Merck & Co.: Whitehouse Station, NJ, 2001; entry 5753.
(3) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:4-9:94.
(4) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:4-9:94.
(5) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:4-9:94.
(6) - T > 502.192626279033
(7) - T < 1183.23387236455